Example usage for java.nio.file StandardOpenOption READ

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StandardOpenOption READ

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Usage

From source file:edu.harvard.iq.dataverse.dataaccess.TabularSubsetGenerator.java

public Object[] subsetObjectVector(File tabfile, int column, int varcount, int casecount, int columntype,
        boolean compatmode) throws IOException {

    Object[] retVector = null;//from  w  w  w.  j ava 2 s.co m

    boolean isString = false;
    boolean isDouble = false;
    boolean isLong = false;
    boolean isFloat = false;

    //Locale loc = new Locale("en", "US");

    if (columntype == COLUMN_TYPE_STRING) {
        isString = true;
        retVector = new String[casecount];
    } else if (columntype == COLUMN_TYPE_DOUBLE) {
        isDouble = true;
        retVector = new Double[casecount];
    } else if (columntype == COLUMN_TYPE_LONG) {
        isLong = true;
        retVector = new Long[casecount];
    } else if (columntype == COLUMN_TYPE_FLOAT) {
        isFloat = true;
        retVector = new Float[casecount];
    } else {
        throw new IOException("Unsupported column type: " + columntype);
    }

    File rotatedImageFile = getRotatedImage(tabfile, varcount, casecount);
    long[] columnEndOffsets = extractColumnOffsets(rotatedImageFile, varcount, casecount);
    long columnOffset = 0;
    long columnLength = 0;

    if (column > 0) {
        columnOffset = columnEndOffsets[column - 1];
        columnLength = columnEndOffsets[column] - columnEndOffsets[column - 1];
    } else {
        columnOffset = varcount * 8;
        columnLength = columnEndOffsets[0] - varcount * 8;
    }

    FileChannel fc = (FileChannel.open(Paths.get(rotatedImageFile.getAbsolutePath()), StandardOpenOption.READ));
    fc.position(columnOffset);
    int MAX_COLUMN_BUFFER = 8192;

    ByteBuffer in = ByteBuffer.allocate(MAX_COLUMN_BUFFER);

    if (columnLength < MAX_COLUMN_BUFFER) {
        in.limit((int) (columnLength));
    }

    long bytesRead = 0;
    long bytesReadTotal = 0;
    int caseindex = 0;
    int byteoffset = 0;
    byte[] leftover = null;

    while (bytesReadTotal < columnLength) {
        bytesRead = fc.read(in);
        byte[] columnBytes = in.array();
        int bytecount = 0;

        while (bytecount < bytesRead) {
            if (columnBytes[bytecount] == '\n') {
                /*
                String token = new String(columnBytes, byteoffset, bytecount-byteoffset, "UTF8");
                        
                if (leftover != null) {
                String leftoverString = new String (leftover, "UTF8");
                token = leftoverString + token;
                leftover = null;
                }
                */
                /* 
                 * Note that the way I was doing it at first - above - 
                 * was not quite the correct way - because I was creating UTF8
                 * strings from the leftover bytes, and the bytes in the 
                 * current buffer *separately*; which means, if a multi-byte
                 * UTF8 character got split in the middle between one buffer
                 * and the next, both chunks of it would become junk 
                 * characters, on each side!
                 * The correct way of doing it, of course, is to create a
                 * merged byte buffer, and then turn it into a UTF8 string. 
                 *      -- L.A. 4.0
                 */
                String token = null;

                if (leftover == null) {
                    token = new String(columnBytes, byteoffset, bytecount - byteoffset, "UTF8");
                } else {
                    byte[] merged = new byte[leftover.length + bytecount - byteoffset];

                    System.arraycopy(leftover, 0, merged, 0, leftover.length);
                    System.arraycopy(columnBytes, byteoffset, merged, leftover.length, bytecount - byteoffset);
                    token = new String(merged, "UTF8");
                    leftover = null;
                    merged = null;
                }

                if (isString) {
                    if ("".equals(token)) {
                        // An empty string is a string missing value!
                        // An empty string in quotes is an empty string!
                        retVector[caseindex] = null;
                    } else {
                        // Strip the outer quotes:
                        token = token.replaceFirst("^\\\"", "");
                        token = token.replaceFirst("\\\"$", "");

                        // We need to restore the special characters that 
                        // are stored in tab files escaped - quotes, new lines 
                        // and tabs. Before we do that however, we need to 
                        // take care of any escaped backslashes stored in 
                        // the tab file. I.e., "foo\t" should be transformed 
                        // to "foo<TAB>"; but "foo\\t" should be transformed 
                        // to "foo\t". This way new lines and tabs that were
                        // already escaped in the original data are not 
                        // going to be transformed to unescaped tab and 
                        // new line characters!

                        String[] splitTokens = token.split(Matcher.quoteReplacement("\\\\"), -2);

                        // (note that it's important to use the 2-argument version 
                        // of String.split(), and set the limit argument to a
                        // negative value; otherwise any trailing backslashes 
                        // are lost.)

                        for (int i = 0; i < splitTokens.length; i++) {
                            splitTokens[i] = splitTokens[i].replaceAll(Matcher.quoteReplacement("\\\""), "\"");
                            splitTokens[i] = splitTokens[i].replaceAll(Matcher.quoteReplacement("\\t"), "\t");
                            splitTokens[i] = splitTokens[i].replaceAll(Matcher.quoteReplacement("\\n"), "\n");
                            splitTokens[i] = splitTokens[i].replaceAll(Matcher.quoteReplacement("\\r"), "\r");
                        }
                        // TODO: 
                        // Make (some of?) the above optional; for ex., we 
                        // do need to restore the newlines when calculating UNFs;
                        // But if we are subsetting these vectors in order to 
                        // create a new tab-delimited file, they will 
                        // actually break things! -- L.A. Jul. 28 2014

                        token = StringUtils.join(splitTokens, '\\');

                        // "compatibility mode" - a hack, to be able to produce
                        // unfs identical to those produced by the "early" 
                        // unf5 jar; will be removed in production 4.0. 
                        // -- L.A. (TODO: ...)
                        if (compatmode && !"".equals(token)) {
                            if (token.length() > 128) {
                                if ("".equals(token.trim())) {
                                    // don't ask... 
                                    token = token.substring(0, 129);
                                } else {
                                    token = token.substring(0, 128);
                                    //token = String.format(loc, "%.128s", token);
                                    token = token.trim();
                                    //dbgLog.info("formatted and trimmed: "+token);
                                }
                            } else {
                                if ("".equals(token.trim())) {
                                    // again, don't ask; 
                                    // - this replicates some bugginness 
                                    // that happens inside unf5;
                                    token = "null";
                                } else {
                                    token = token.trim();
                                }
                            }
                        }

                        retVector[caseindex] = token;
                    }
                } else if (isDouble) {
                    try {
                        // TODO: verify that NaN and +-Inf are 
                        // handled correctly here! -- L.A.
                        // Verified: new Double("nan") works correctly, 
                        // resulting in Double.NaN;
                        // Double("[+-]Inf") doesn't work however; 
                        // (the constructor appears to be expecting it
                        // to be spelled as "Infinity", "-Infinity", etc. 
                        if ("inf".equalsIgnoreCase(token) || "+inf".equalsIgnoreCase(token)) {
                            retVector[caseindex] = java.lang.Double.POSITIVE_INFINITY;
                        } else if ("-inf".equalsIgnoreCase(token)) {
                            retVector[caseindex] = java.lang.Double.NEGATIVE_INFINITY;
                        } else if (token == null || token.equals("")) {
                            // missing value:
                            retVector[caseindex] = null;
                        } else {
                            retVector[caseindex] = new Double(token);
                        }
                    } catch (NumberFormatException ex) {
                        dbgLog.warning("NumberFormatException thrown for " + token + " as Double");

                        retVector[caseindex] = null; // missing value
                        // TODO: ?
                    }
                } else if (isLong) {
                    try {
                        retVector[caseindex] = new Long(token);
                    } catch (NumberFormatException ex) {
                        retVector[caseindex] = null; // assume missing value
                    }
                } else if (isFloat) {
                    try {
                        if ("inf".equalsIgnoreCase(token) || "+inf".equalsIgnoreCase(token)) {
                            retVector[caseindex] = java.lang.Float.POSITIVE_INFINITY;
                        } else if ("-inf".equalsIgnoreCase(token)) {
                            retVector[caseindex] = java.lang.Float.NEGATIVE_INFINITY;
                        } else if (token == null || token.equals("")) {
                            // missing value:
                            retVector[caseindex] = null;
                        } else {
                            retVector[caseindex] = new Float(token);
                        }
                    } catch (NumberFormatException ex) {
                        dbgLog.warning("NumberFormatException thrown for " + token + " as Float");
                        retVector[caseindex] = null; // assume missing value (TODO: ?)
                    }
                }
                caseindex++;

                if (bytecount == bytesRead - 1) {
                    byteoffset = 0;
                } else {
                    byteoffset = bytecount + 1;
                }
            } else {
                if (bytecount == bytesRead - 1) {
                    // We've reached the end of the buffer; 
                    // This means we'll save whatever unused bytes left in 
                    // it - i.e., the bytes between the last new line 
                    // encountered and the end - in the leftover buffer. 

                    // *EXCEPT*, there may be a case of a very long String
                    // that is actually longer than MAX_COLUMN_BUFFER, in 
                    // which case it is possible that we've read through
                    // an entire buffer of bytes without finding any 
                    // new lines... in this case we may need to add this
                    // entire byte buffer to an already existing leftover 
                    // buffer!
                    if (leftover == null) {
                        leftover = new byte[(int) bytesRead - byteoffset];
                        System.arraycopy(columnBytes, byteoffset, leftover, 0, (int) bytesRead - byteoffset);
                    } else {
                        if (byteoffset != 0) {
                            throw new IOException(
                                    "Reached the end of the byte buffer, with some leftover left from the last read; yet the offset is not zero!");
                        }
                        byte[] merged = new byte[leftover.length + (int) bytesRead];

                        System.arraycopy(leftover, 0, merged, 0, leftover.length);
                        System.arraycopy(columnBytes, byteoffset, merged, leftover.length, (int) bytesRead);
                        //leftover = null;
                        leftover = merged;
                        merged = null;
                    }
                    byteoffset = 0;

                }
            }
            bytecount++;
        }

        bytesReadTotal += bytesRead;
        in.clear();
        if (columnLength - bytesReadTotal < MAX_COLUMN_BUFFER) {
            in.limit((int) (columnLength - bytesReadTotal));
        }
    }

    fc.close();

    if (caseindex != casecount) {
        throw new IOException("Faile to read " + casecount + " tokens for column " + column);
        //System.out.println("read "+caseindex+" tokens instead of expected "+casecount+".");
    }

    return retVector;
}

---

From source file:AndroidUninstallStock.java

public static LinkedList<String> getLibsInApk(Path apk) throws IOException {
    LinkedList<String> libs = new LinkedList<String>();
    try (JarInputStream jar = new JarInputStream(
            Files.newInputStream(apk, new StandardOpenOption[] { StandardOpenOption.READ }))) {
        JarEntry jent;//from   www .  j av  a  2 s. c o m
        int pos;
        while ((jent = jar.getNextJarEntry()) != null) {
            if (!jent.isDirectory() && ((pos = jent.getName().indexOf("lib/")) == 0 || pos == 1)) {
                libs.add(jent.getName());
            }
        }
    }
    return libs;
}

---

From source file:org.apache.nifi.controller.StandardFlowService.java

@Override
public void copyCurrentFlow(final OutputStream os) throws IOException {
    readLock.lock();//from  www .  j  a v  a2s .  c om
    try {
        if (!Files.exists(flowXml) || Files.size(flowXml) == 0) {
            return;
        }

        try (final InputStream in = Files.newInputStream(flowXml, StandardOpenOption.READ);
                final InputStream gzipIn = new GZIPInputStream(in)) {
            FileUtils.copy(gzipIn, os);
        }
    } finally {
        readLock.unlock();
    }
}

---

From source file:net.sf.jabref.logic.xmp.XMPUtil.java

/**
 * see XMPUtil.hasMetadata(InputStream)/*from   www .  ja va  2  s .c  o m*/
 */
public static boolean hasMetadata(Path path, JabRefPreferences prefs) {
    try (InputStream inputStream = Files.newInputStream(path, StandardOpenOption.READ)) {
        return hasMetadata(inputStream, prefs);
    } catch (IOException e) {
        LOGGER.error("XMP reading failed", e);
        return false;
    }
}

---

From source file:com.github.wshackle.java4cpp.J4CppMain.java

public static void main(String[] args) throws IOException, ClassNotFoundException {
    main_completed = false;//  w ww . j  a va  2 s. co m

    Options options = new Options();
    options.addOption(Option.builder("?").desc("Print this message").longOpt("help").build());
    options.addOption(Option.builder("n").hasArg().desc("C++ namespace for newly generated classes.")
            .longOpt("namespace").build());
    options.addOption(
            Option.builder("c").hasArgs().desc("Single Java class to extract.").longOpt("classes").build());
    options.addOption(
            Option.builder("p").hasArgs().desc("Java Package prefix to extract").longOpt("packages").build());
    options.addOption(Option.builder("o").hasArg().desc("Output C++ source file.").longOpt("output").build());
    options.addOption(Option.builder("j").hasArg().desc("Input jar file").longOpt("jar").build());
    options.addOption(Option.builder("h").hasArg().desc("Output C++ header file.").longOpt("header").build());
    options.addOption(Option.builder("l").hasArg()
            .desc("Maximum limit on classes to extract from jars.[default=200]").longOpt("limit").build());
    options.addOption(Option.builder("v").desc("enable verbose output").longOpt("verbose").build());
    options.addOption(Option.builder().hasArg().desc("Classes per output file.[default=10]")
            .longOpt(CLASSESPEROUTPUT).build());
    options.addOption(Option.builder().hasArgs().desc(
            "Comma seperated list of nativeclass=javaclass native where nativeclass will be generated as an extension/implementation of the java class.")
            .longOpt("natives").build());
    options.addOption(Option.builder().hasArg()
            .desc("library name for System.loadLibrary(...) for native extension classes")
            .longOpt("loadlibname").build());
    String output = null;
    String header = null;
    String jar = null;
    Set<String> classnamesToFind = null;
    Set<String> packageprefixes = null;
    String loadlibname = null;

    Map<String, String> nativesNameMap = null;
    Map<String, Class> nativesClassMap = null;
    int limit = DEFAULT_LIMIT;
    int classes_per_file = 10;
    List<Class> classes = new ArrayList<>();

    String limitstring = Integer.toString(limit);

    try {
        // parse the command line arguments
        System.out.println("args = " + Arrays.toString(args));
        CommandLine line = new DefaultParser().parse(options, args);
        loadlibname = line.getOptionValue("loadlibname");
        verbose = line.hasOption("verbose");
        if (line.hasOption(CLASSESPEROUTPUT)) {
            String cpoStr = line.getOptionValue(CLASSESPEROUTPUT);
            try {
                int cpoI = Integer.valueOf(cpoStr);
                classes_per_file = cpoI;
            } catch (Exception e) {
                System.err.println("Option for " + CLASSESPEROUTPUT + "=\"" + cpoStr + "\"");
                printHelpAndExit(options, args);
            }
        }

        if (line.hasOption("natives")) {
            String natives[] = line.getOptionValues("natives");
            if (verbose) {
                System.out.println("natives = " + Arrays.toString(natives));
            }
            nativesNameMap = new HashMap<>();
            nativesClassMap = new HashMap<>();
            for (int i = 0; i < natives.length; i++) {
                int eq_index = natives[i].indexOf('=');
                String nativeClassName = natives[i].substring(0, eq_index).trim();
                String javaClassName = natives[i].substring(eq_index + 1).trim();
                Class javaClass = null;
                try {
                    javaClass = Class.forName(javaClassName);
                } catch (ClassNotFoundException e) {
                    //e.printStackTrace();
                    System.err.println("Class for " + javaClassName
                            + " not found. (It may be found later in jar if specified.)");
                }
                nativesNameMap.put(javaClassName, nativeClassName);
                if (javaClass != null) {
                    nativesClassMap.put(nativeClassName, javaClass);
                    if (!classes.contains(javaClass)) {
                        classes.add(javaClass);
                    }
                }
            }
        }
        //            // validate that block-size has been set
        //            if (line.hasOption("block-size")) {
        //                // print the value of block-size
        //                if(verbose) System.out.println(line.getOptionValue("block-size"));
        //            }
        jar = line.getOptionValue("jar", jar);
        if (verbose) {
            System.out.println("jar = " + jar);
        }
        if (null != jar) {
            if (jar.startsWith("~/")) {
                jar = new File(new File(getHomeDir()), jar.substring(2)).getCanonicalPath();
            }
            if (jar.startsWith("./")) {
                jar = new File(new File(getCurrentDir()), jar.substring(2)).getCanonicalPath();
            }
            if (jar.startsWith("../")) {
                jar = new File(new File(getCurrentDir()).getParentFile(), jar.substring(3)).getCanonicalPath();
            }
        }
        if (line.hasOption("classes")) {
            classnamesToFind = new HashSet<String>();
            String classStrings[] = line.getOptionValues("classes");
            if (verbose) {
                System.out.println("classStrings = " + Arrays.toString(classStrings));
            }
            classnamesToFind.addAll(Arrays.asList(classStrings));
            if (verbose) {
                System.out.println("classnamesToFind = " + classnamesToFind);
            }
        }
        //                if (!line.hasOption("namespace")) {
        //                    if (classname != null && classname.length() > 0) {
        //                        namespace = classname.toLowerCase().replace(".", "_");
        //                    } else if (jar != null && jar.length() > 0) {
        //                        int lastSep = jar.lastIndexOf(File.separator);
        //                        int start = Math.max(0, lastSep + 1);
        //                        int period = jar.indexOf('.', start + 1);
        //                        int end = Math.max(start + 1, period);
        //                        namespace = jar.substring(start, end).toLowerCase();
        //                        namespace = namespace.replace(" ", "_");
        //                        if (namespace.indexOf("-") > 0) {
        //                            namespace = namespace.substring(0, namespace.indexOf("-"));
        //                        }
        //                    }
        //                }

        namespace = line.getOptionValue("namespace", namespace);
        if (verbose) {
            System.out.println("namespace = " + namespace);
        }
        if (null != namespace) {
            output = namespace + ".cpp";
        }
        output = line.getOptionValue("output", output);
        if (verbose) {
            System.out.println("output = " + output);
        }
        if (null != output) {
            if (output.startsWith("~/")) {
                output = System.getProperty("user.home") + output.substring(1);
            }
            header = output.substring(0, output.lastIndexOf('.')) + ".h";
        } else {
            output = "out.cpp";
        }
        header = line.getOptionValue("header", header);
        if (verbose) {
            System.out.println("header = " + header);
        }
        if (null != header) {
            if (header.startsWith("~/")) {
                header = System.getProperty("user.home") + header.substring(1);
            }
        } else {
            header = "out.h";
        }

        if (line.hasOption("packages")) {
            packageprefixes = new HashSet<String>();
            packageprefixes.addAll(Arrays.asList(line.getOptionValues("packages")));
        }
        if (line.hasOption("limit")) {
            limitstring = line.getOptionValue("limit", Integer.toString(DEFAULT_LIMIT));
            limit = Integer.valueOf(limitstring);
        }
        if (line.hasOption("help")) {
            printHelpAndExit(options, args);
        }
    } catch (ParseException exp) {
        if (verbose) {
            System.out.println("Unexpected exception:" + exp.getMessage());
        }
        printHelpAndExit(options, args);
    }

    Set<Class> excludedClasses = new HashSet<>();
    Set<String> foundClassNames = new HashSet<>();
    excludedClasses.add(Object.class);
    excludedClasses.add(String.class);
    excludedClasses.add(void.class);
    excludedClasses.add(Void.class);
    excludedClasses.add(Class.class);
    excludedClasses.add(Enum.class);
    Set<String> packagesSet = new TreeSet<>();
    List<URL> urlsList = new ArrayList<>();
    String cp = System.getProperty("java.class.path");
    if (verbose) {
        System.out.println("System.getProperty(\"java.class.path\") = " + cp);
    }
    if (null != cp) {
        for (String cpe : cp.split(File.pathSeparator)) {
            if (verbose) {
                System.out.println("class path element = " + cpe);
            }
            File f = new File(cpe);
            if (f.isDirectory()) {
                urlsList.add(new URL("file:" + f.getCanonicalPath() + File.separator));
            } else if (cpe.endsWith(".jar")) {
                urlsList.add(new URL("jar:file:" + f.getCanonicalPath() + "!/"));
            }
        }
    }
    cp = System.getenv("CLASSPATH");
    if (verbose) {
        System.out.println("System.getenv(\"CLASSPATH\") = " + cp);
    }
    if (null != cp) {
        for (String cpe : cp.split(File.pathSeparator)) {
            if (verbose) {
                System.out.println("class path element = " + cpe);
            }
            File f = new File(cpe);
            if (f.isDirectory()) {
                urlsList.add(new URL("file:" + f.getCanonicalPath() + File.separator));
            } else if (cpe.endsWith(".jar")) {
                urlsList.add(new URL("jar:file:" + f.getCanonicalPath() + "!/"));
            }
        }
    }
    if (verbose) {
        System.out.println("urlsList = " + urlsList);
    }

    if (null != jar && jar.length() > 0) {
        Path jarPath = FileSystems.getDefault().getPath(jar);
        ZipInputStream zip = new ZipInputStream(Files.newInputStream(jarPath, StandardOpenOption.READ));

        URL jarUrl = new URL("jar:file:" + jarPath.toFile().getCanonicalPath() + "!/");
        urlsList.add(jarUrl);
        URL[] urls = urlsList.toArray(new URL[urlsList.size()]);
        if (verbose) {
            System.out.println("urls = " + Arrays.toString(urls));
        }
        URLClassLoader cl = URLClassLoader.newInstance(urls);
        for (ZipEntry entry = zip.getNextEntry(); entry != null; entry = zip.getNextEntry()) {
            // This ZipEntry represents a class. Now, what class does it represent?
            String entryName = entry.getName();
            if (verbose) {
                System.out.println("entryName = " + entryName);
            }

            if (!entry.isDirectory() && entryName.endsWith(".class")) {

                if (entryName.indexOf('$') >= 0) {
                    continue;
                }
                String classFileName = entry.getName().replace('/', '.');
                String className = classFileName.substring(0, classFileName.length() - ".class".length());
                if (classnamesToFind != null && classnamesToFind.size() > 0
                        && !classnamesToFind.contains(className)) {
                    if (verbose) {
                        System.out.println("skipping className=" + className + " because it does not found in="
                                + classnamesToFind);
                    }
                    continue;
                }
                try {
                    Class clss = cl.loadClass(className);
                    if (null != nativesClassMap && null != nativesNameMap
                            && nativesNameMap.containsKey(className)) {
                        nativesClassMap.put(nativesNameMap.get(className), clss);
                        if (!classes.contains(clss)) {
                            classes.add(clss);
                        }
                    }
                    if (packageprefixes != null && packageprefixes.size() > 0) {
                        if (null == clss.getPackage()) {
                            continue;
                        }
                        final String pkgName = clss.getPackage().getName();
                        boolean matchFound = false;
                        for (String prefix : packageprefixes) {
                            if (pkgName.startsWith(prefix)) {
                                matchFound = true;
                                break;
                            }
                        }
                        if (!matchFound) {
                            continue;
                        }
                    }
                    Package p = clss.getPackage();
                    if (null != p) {
                        packagesSet.add(clss.getPackage().getName());
                    }
                    if (!classes.contains(clss) && isAddableClass(clss, excludedClasses)) {
                        if (null != classnamesToFind && classnamesToFind.contains(className)
                                && !foundClassNames.contains(className)) {
                            foundClassNames.add(className);
                            if (verbose) {
                                System.out.println("foundClassNames = " + foundClassNames);
                            }
                        }
                        //                        if(verbose) System.out.println("clss = " + clss);
                        classes.add(clss);
                        //                        Class superClass = clss.getSuperclass();
                        //                        while (null != superClass
                        //                                && !classes.contains(superClass)
                        //                                && isAddableClass(superClass, excludedClasses)) {
                        //                            classes.add(superClass);
                        //                            superClass = superClass.getSuperclass();
                        //                        }
                    }
                } catch (ClassNotFoundException | NoClassDefFoundError ex) {
                    System.err.println(
                            "Caught " + ex.getClass().getName() + ":" + ex.getMessage() + " for className="
                                    + className + ", entryName=" + entryName + ", jarPath=" + jarPath);
                }
            }
        }
    }
    if (null != classnamesToFind) {
        if (verbose) {
            System.out.println("Checking classnames arguments");
        }
        for (String classname : classnamesToFind) {
            if (verbose) {
                System.out.println("classname = " + classname);
            }
            if (foundClassNames.contains(classname)) {
                if (verbose) {
                    System.out.println("foundClassNames.contains(" + classname + ")");
                }
                continue;
            }
            try {
                if (classes.contains(Class.forName(classname))) {
                    if (verbose) {
                        System.out.println("Classes list already contains:  " + classname);
                    }
                    continue;
                }
            } catch (Exception e) {

            }

            if (null != classname && classname.length() > 0) {
                urlsList.add(new URL("file://" + System.getProperty("user.dir") + "/"));

                URL[] urls = urlsList.toArray(new URL[urlsList.size()]);
                if (verbose) {
                    System.out.println("urls = " + Arrays.toString(urls));
                }
                URLClassLoader cl = URLClassLoader.newInstance(urls);
                Class c = null;
                try {
                    c = cl.loadClass(classname);
                } catch (ClassNotFoundException e) {
                    System.err.println("Class " + classname + " not found ");
                }
                if (verbose) {
                    System.out.println("c = " + c);
                }
                if (null == c) {
                    try {
                        c = ClassLoader.getSystemClassLoader().loadClass(classname);
                    } catch (ClassNotFoundException e) {
                        if (verbose) {
                            System.out.println("System ClassLoader failed to find " + classname);
                        }
                    }
                }
                if (null != c) {
                    classes.add(c);
                } else {
                    System.err.println("Class " + classname + " not found");
                }
            }
        }
        if (verbose) {
            System.out.println("Finished checking classnames arguments");
        }
    }
    if (classes == null || classes.size() < 1) {
        if (null == nativesClassMap || nativesClassMap.keySet().size() < 1) {
            System.err.println("No Classes specified or found.");
            System.exit(1);
        }
    }
    if (verbose) {
        System.out.println("Classes found = " + classes.size());
    }
    if (classes.size() > limit) {
        System.err.println("limit=" + limit);
        System.err.println(
                "Too many classes please use -c or -p options to limit classes or -l to increase limit.");
        if (verbose) {
            System.out.println("packagesSet = " + packagesSet);
        }
        System.exit(1);
    }
    List<Class> newClasses = new ArrayList<Class>();
    for (Class clss : classes) {
        Class superClass = clss.getSuperclass();
        while (null != superClass && !classes.contains(superClass) && !newClasses.contains(superClass)
                && isAddableClass(superClass, excludedClasses)) {
            newClasses.add(superClass);
            superClass = superClass.getSuperclass();
        }
        try {
            Field fa[] = clss.getDeclaredFields();
            for (Field f : fa) {
                if (Modifier.isPublic(f.getModifiers())) {
                    Class fClass = f.getType();
                    if (!classes.contains(fClass) && !newClasses.contains(fClass)
                            && isAddableClass(fClass, excludedClasses)) {
                        newClasses.add(fClass);
                    }
                }
            }
        } catch (NoClassDefFoundError e) {
            e.printStackTrace();
        }
        for (Method m : clss.getDeclaredMethods()) {
            if (m.isSynthetic()) {
                continue;
            }
            if (!Modifier.isPublic(m.getModifiers()) || Modifier.isAbstract(m.getModifiers())) {
                continue;
            }
            Class retType = m.getReturnType();
            if (verbose) {
                System.out.println("Checking dependancies for Method = " + m);
            }
            if (!classes.contains(retType) && !newClasses.contains(retType)
                    && isAddableClass(retType, excludedClasses)) {
                newClasses.add(retType);
                superClass = retType.getSuperclass();
                while (null != superClass && !classes.contains(superClass) && !newClasses.contains(superClass)
                        && isAddableClass(superClass, excludedClasses)) {
                    newClasses.add(superClass);
                    superClass = superClass.getSuperclass();
                }
            }
            for (Class paramType : m.getParameterTypes()) {
                if (!classes.contains(paramType) && !newClasses.contains(paramType)
                        && isAddableClass(paramType, excludedClasses)) {
                    newClasses.add(paramType);
                    superClass = paramType.getSuperclass();
                    while (null != superClass && !classes.contains(superClass)
                            && !newClasses.contains(superClass) && !excludedClasses.contains(superClass)) {
                        newClasses.add(superClass);
                        superClass = superClass.getSuperclass();
                    }
                }
            }
        }
    }
    if (null != nativesClassMap) {
        for (Class clss : nativesClassMap.values()) {
            if (null != clss) {
                Class superClass = clss.getSuperclass();
                while (null != superClass && !classes.contains(superClass) && !newClasses.contains(superClass)
                        && !excludedClasses.contains(superClass)) {
                    newClasses.add(superClass);
                    superClass = superClass.getSuperclass();
                }
            }
        }
    }
    if (verbose) {
        System.out.println("Dependency classes needed = " + newClasses.size());
    }
    classes.addAll(newClasses);
    List<Class> newOrderClasses = new ArrayList<>();
    for (Class clss : classes) {
        if (newOrderClasses.contains(clss)) {
            continue;
        }
        Class superClass = clss.getSuperclass();
        Stack<Class> stack = new Stack<>();
        while (null != superClass && !newOrderClasses.contains(superClass)
                && !superClass.equals(java.lang.Object.class)) {
            stack.push(superClass);
            superClass = superClass.getSuperclass();
        }
        while (!stack.empty()) {
            newOrderClasses.add(stack.pop());
        }
        newOrderClasses.add(clss);
    }
    classes = newOrderClasses;
    if (verbose) {
        System.out.println("Total number of classes = " + classes.size());
        System.out.println("classes = " + classes);
    }

    String forward_header = header.substring(0, header.lastIndexOf('.')) + "_fwd.h";
    Map<String, String> map = new HashMap<>();
    map.put(JAR, jar != null ? jar : "");
    map.put("%CLASSPATH_PREFIX%",
            getCurrentDir() + ((jar != null)
                    ? (File.pathSeparator + ((new File(jar).getCanonicalPath()).replace("\\", "\\\\")))
                    : ""));
    map.put("%FORWARD_HEADER%", forward_header);
    map.put("%HEADER%", header);
    map.put("%PATH_SEPERATOR%", File.pathSeparator);
    String tabs = "";
    String headerDefine = forward_header.substring(Math.max(0, forward_header.indexOf(File.separator)))
            .replace(".", "_");
    map.put(HEADER_DEFINE, headerDefine);
    map.put(NAMESPACE, namespace);
    if (null != nativesClassMap) {
        for (Entry<String, Class> e : nativesClassMap.entrySet()) {
            final Class javaClass = e.getValue();
            final String nativeClassName = e.getKey();
            try (PrintWriter pw = new PrintWriter(new FileWriter(nativeClassName + ".java"))) {
                if (javaClass.isInterface()) {
                    pw.println("public class " + nativeClassName + " implements " + javaClass.getCanonicalName()
                            + ", AutoCloseable{");
                } else {
                    pw.println("public class " + nativeClassName + " extends " + javaClass.getCanonicalName()
                            + " implements AutoCloseable{");
                }
                if (null != loadlibname && loadlibname.length() > 0) {
                    pw.println(TAB_STRING + "static {");
                    pw.println(TAB_STRING + TAB_STRING + "System.loadLibrary(\"" + loadlibname + "\");");
                    pw.println(TAB_STRING + "}");
                    pw.println();
                }
                pw.println(TAB_STRING + "public " + nativeClassName + "() {");
                pw.println(TAB_STRING + "}");
                pw.println();
                pw.println(TAB_STRING + "private long nativeAddress=0;");
                pw.println(TAB_STRING + "private boolean nativeDeleteOnClose=false;");
                pw.println();

                pw.println(TAB_STRING + "protected " + nativeClassName + "(final long nativeAddress) {");
                pw.println(TAB_STRING + TAB_STRING + "this.nativeAddress = nativeAddress;");
                pw.println(TAB_STRING + "}");

                pw.println(TAB_STRING + "private native void nativeDelete();");
                pw.println();
                pw.println(TAB_STRING + "@Override");
                pw.println(TAB_STRING + "public synchronized void  close() {");
                //                        pw.println(TAB_STRING + TAB_STRING + "if(nativeAddress != 0 && nativeDeleteOnClose) {");
                pw.println(TAB_STRING + TAB_STRING + "nativeDelete();");
                //                        pw.println(TAB_STRING + TAB_STRING + "}");
                //                        pw.println(TAB_STRING + TAB_STRING + "nativeAddress=0;");
                //                        pw.println(TAB_STRING + TAB_STRING + "nativeDeleteOnClose=false;");
                pw.println(TAB_STRING + "}");

                pw.println();
                pw.println(TAB_STRING + "protected void finalizer() {");
                pw.println(TAB_STRING + TAB_STRING + "close();");
                pw.println(TAB_STRING + "}");

                pw.println();
                Method ma[] = javaClass.getDeclaredMethods();
                for (Method m : ma) {
                    int modifiers = m.getModifiers();
                    if (Modifier.isAbstract(modifiers) && Modifier.isPublic(modifiers)
                            && !Modifier.isStatic(modifiers)
                            //                                && !m.isDefault()
                            && !m.isSynthetic()) {
                        pw.println();
                        pw.println(TAB_STRING + "@Override");
                        String params = "";
                        for (int i = 0; i < m.getParameterTypes().length; i++) {
                            params += m.getParameterTypes()[i].getCanonicalName() + " param" + i;
                            if (i < m.getParameterTypes().length - 1) {
                                params += ",";
                            }
                        }
                        pw.println(TAB_STRING + "native public " + m.getReturnType().getCanonicalName() + " "
                                + m.getName() + "(" + params + ");");
                        //                                    + IntStream.range(0, m.getParameterTypes().length)
                        //                                    .mapToObj(i -> m.getParameterTypes()[i].getCanonicalName() + " param" + i)
                        //                                    .collect(Collectors.joining(",")) + ");");
                    }
                }
                pw.println("}");
            }
        }
    }
    try (PrintWriter pw = new PrintWriter(new FileWriter(forward_header))) {
        tabs = "";
        processTemplate(pw, map, "header_fwd_template_start.h", tabs);
        Class lastClass = null;
        for (int class_index = 0; class_index < classes.size(); class_index++) {
            Class clss = classes.get(class_index);
            String clssOnlyName = getCppClassName(clss);
            tabs = openClassNamespace(clss, pw, tabs, lastClass);
            tabs += TAB_STRING;
            pw.println(tabs + "class " + clssOnlyName + ";");
            tabs = tabs.substring(0, tabs.length() - 1);
            Class nextClass = (class_index < (classes.size() - 1)) ? classes.get(class_index + 1) : null;
            tabs = closeClassNamespace(clss, pw, tabs, nextClass);
            lastClass = clss;
        }
        processTemplate(pw, map, "header_fwd_template_end.h", tabs);
    }
    headerDefine = header.substring(Math.max(0, header.indexOf(File.separator))).replace(".", "_");
    map.put(HEADER_DEFINE, headerDefine);
    map.put(NAMESPACE, namespace);
    if (classes_per_file < 1) {
        classes_per_file = classes.size();
    }
    final int num_class_segments = (classes.size() > 1)
            ? ((classes.size() + classes_per_file - 1) / classes_per_file)
            : 1;
    String fmt = "%d";
    if (num_class_segments > 10) {
        fmt = "%02d";
    }
    if (num_class_segments > 100) {
        fmt = "%03d";
    }
    String header_file_base = header;
    if (header_file_base.endsWith(".h")) {
        header_file_base = header_file_base.substring(0, header_file_base.length() - 2);
    } else if (header_file_base.endsWith(".hh")) {
        header_file_base = header_file_base.substring(0, header_file_base.length() - 3);
    } else if (header_file_base.endsWith(".hpp")) {
        header_file_base = header_file_base.substring(0, header_file_base.length() - 4);
    }
    try (PrintWriter pw = new PrintWriter(new FileWriter(header))) {
        tabs = "";
        processTemplate(pw, map, HEADER_TEMPLATE_STARTH, tabs);
        for (int segment_index = 0; segment_index < num_class_segments; segment_index++) {
            String header_segment_file = header_file_base + String.format(fmt, segment_index) + ".h";
            pw.println("#include \"" + header_segment_file + "\"");
        }
        if (null != nativesClassMap) {
            tabs = TAB_STRING;
            for (Entry<String, Class> e : nativesClassMap.entrySet()) {
                final Class javaClass = e.getValue();
                final String nativeClassName = e.getKey();
                pw.println();
                pw.println(tabs + "class " + nativeClassName + "Context;");
                pw.println();
                map.put(CLASS_NAME, nativeClassName);
                map.put("%BASE_CLASS_FULL_NAME%",
                        "::" + namespace + "::" + getModifiedClassName(javaClass).replace(".", "::"));
                map.put(OBJECT_CLASS_FULL_NAME, "::" + namespace + "::java::lang::Object");
                processTemplate(pw, map, HEADER_CLASS_STARTH, tabs);
                tabs += TAB_STRING;
                pw.println(tabs + nativeClassName + "Context *context;");
                pw.println(tabs + nativeClassName + "();");
                pw.println(tabs + "~" + nativeClassName + "();");
                Method methods[] = javaClass.getDeclaredMethods();
                for (int j = 0; j < methods.length; j++) {
                    Method method = methods[j];
                    int modifiers = method.getModifiers();
                    if (!Modifier.isPublic(modifiers)) {
                        continue;
                    }
                    if (Modifier.isAbstract(modifiers) && Modifier.isPublic(modifiers)
                            && !Modifier.isStatic(modifiers)
                            //                                && !method.isDefault()
                            && !method.isSynthetic()) {
                        pw.println(tabs + getNativeMethodCppDeclaration(method, javaClass));
                    }
                }
                pw.println(tabs + "void initContext(" + nativeClassName + "Context *ctx,bool isref);");
                pw.println(tabs + "void deleteContext();");
                tabs = tabs.substring(TAB_STRING.length());
                pw.println(tabs + "}; // end class " + nativeClassName);
            }
        }
        tabs = "";
        processTemplate(pw, map, HEADER_TEMPLATE_ENDH, tabs);
    }
    for (int segment_index = 0; segment_index < num_class_segments; segment_index++) {
        String header_segment_file = header_file_base + String.format(fmt, segment_index) + ".h";
        try (PrintWriter pw = new PrintWriter(new FileWriter(header_segment_file))) {
            tabs = "";
            //processTemplate(pw, map, HEADER_TEMPLATE_STARTH, tabs);
            pw.println("// Never include this file (" + header_segment_file + ") directly. include " + header
                    + " instead.");
            pw.println();
            Class lastClass = null;
            final int start_segment_index = segment_index * classes_per_file;
            final int end_segment_index = Math.min(segment_index * classes_per_file + classes_per_file,
                    classes.size());
            List<Class> classesSegList = classes.subList(start_segment_index, end_segment_index);
            pw.println();
            pw.println(tabs + "// start_segment_index = " + start_segment_index);
            pw.println(tabs + "// start_segment_index = " + end_segment_index);
            pw.println(tabs + "// segment_index = " + segment_index);
            pw.println(tabs + "// classesSegList=" + classesSegList);
            pw.println();
            for (int class_index = 0; class_index < classesSegList.size(); class_index++) {
                Class clss = classesSegList.get(class_index);
                pw.println();
                pw.println(tabs + "// class_index = " + class_index + " clss=" + clss);
                pw.println();
                String clssName = clss.getCanonicalName();
                tabs = openClassNamespace(clss, pw, tabs, lastClass);
                String clssOnlyName = getCppClassName(clss);
                map.put(CLASS_NAME, clssOnlyName);
                map.put("%BASE_CLASS_FULL_NAME%", classToCppBase(clss));
                map.put(OBJECT_CLASS_FULL_NAME, getCppRelativeName(Object.class, clss));
                tabs += TAB_STRING;
                processTemplate(pw, map, HEADER_CLASS_STARTH, tabs);
                tabs += TAB_STRING;

                Constructor constructors[] = clss.getDeclaredConstructors();
                if (!hasNoArgConstructor(constructors)) {
                    if (Modifier.isAbstract(clss.getModifiers()) || clss.isInterface()) {
                        pw.println(tabs + "protected:");
                        pw.println(tabs + clssOnlyName + "() {};");
                        pw.println(tabs + "public:");
                    } else {
                        if (constructors.length > 0) {
                            pw.println(tabs + "protected:");
                        }
                        pw.println(tabs + clssOnlyName + "();");
                        if (constructors.length > 0) {
                            pw.println(tabs + "public:");
                        }
                    }
                }
                for (Constructor c : constructors) {
                    if (c.getParameterTypes().length == 0 && Modifier.isProtected(c.getModifiers())) {
                        pw.println(tabs + "protected:");
                        pw.println(tabs + clssOnlyName + "();");
                        pw.println(tabs + "public:");
                    }
                    if (checkConstructor(c, clss, classes)) {
                        continue;
                    }

                    if (c.getParameterTypes().length == 1 && clss.isAssignableFrom(c.getParameterTypes()[0])) {
                        continue;
                    }
                    if (!Modifier.isPublic(c.getModifiers())) {
                        continue;
                    }
                    if (c.getParameterTypes().length == 1) {
                        if (c.getParameterTypes()[0].getName().equals(clss.getName())) {
                            //                                    if(verbose) System.out.println("skipping constructor.");
                            continue;
                        }
                    }

                    if (!checkParameters(c.getParameterTypes(), classes)) {
                        continue;
                    }
                    pw.println(
                            tabs + clssOnlyName + getCppParamDeclarations(c.getParameterTypes(), clss) + ";");
                    if (isConstructorToMakeEasy(c, clss)) {
                        pw.println(tabs + clssOnlyName
                                + getEasyCallCppParamDeclarations(c.getParameterTypes(), clss) + ";");
                    }
                }

                pw.println(tabs + "~" + clssOnlyName + "();");
                Field fa[] = clss.getDeclaredFields();
                for (int findex = 0; findex < fa.length; findex++) {
                    Field field = fa[findex];
                    if (addGetterMethod(field, clss, classes)) {
                        pw.println(tabs + getCppFieldGetterDeclaration(field, clss));
                    }
                    if (addSetterMethod(field, clss, classes)) {
                        pw.println(tabs + getCppFieldSetterDeclaration(field, clss));
                    }
                }
                Method methods[] = clss.getDeclaredMethods();
                for (int j = 0; j < methods.length; j++) {
                    Method method = methods[j];
                    if (!checkMethod(method, classes)) {
                        continue;
                    }
                    if ((method.getModifiers() & Modifier.PUBLIC) == Modifier.PUBLIC) {
                        pw.println(tabs + getCppDeclaration(method, clss));
                    }
                    if (isArrayStringMethod(method)) {
                        pw.println(tabs + getCppModifiers(method.getModifiers())
                                + getCppType(method.getReturnType(), clss) + " " + fixMethodName(method)
                                + "(int argc,const char **argv);");
                    }
                    if (isMethodToMakeEasy(method)) {
                        pw.println(tabs + getEasyCallCppDeclaration(method, clss));
                    }
                }
                tabs = tabs.substring(TAB_STRING.length());
                pw.println(tabs + "}; // end class " + clssOnlyName);
                tabs = tabs.substring(0, tabs.length() - 1);
                Class nextClass = (class_index < (classesSegList.size() - 1))
                        ? classesSegList.get(class_index + 1)
                        : null;
                tabs = closeClassNamespace(clss, pw, tabs, nextClass);
                pw.println();
                lastClass = clss;
            }
            //processTemplate(pw, map, HEADER_TEMPLATE_ENDH, tabs);
        }
    }
    for (int segment_index = 0; segment_index < num_class_segments; segment_index++) {
        String output_segment_file = output;
        if (output_segment_file.endsWith(".cpp")) {
            output_segment_file = output_segment_file.substring(0, output_segment_file.length() - 4);
        } else if (output_segment_file.endsWith(".cc")) {
            output_segment_file = output_segment_file.substring(0, output_segment_file.length() - 3);
        }
        output_segment_file += "" + String.format(fmt, segment_index) + ".cpp";
        try (PrintWriter pw = new PrintWriter(new FileWriter(output_segment_file))) {
            tabs = "";
            if (segment_index < 1) {
                processTemplate(pw, map, "cpp_template_start_first.cpp", tabs);
            } else {
                processTemplate(pw, map, CPP_TEMPLATE_STARTCPP, tabs);
            }
            final int start_segment_index = segment_index * classes_per_file;
            final int end_segment_index = Math.min(segment_index * classes_per_file + classes_per_file,
                    classes.size());
            List<Class> classesSegList = classes.subList(start_segment_index, end_segment_index);
            pw.println();
            pw.println(tabs + "// start_segment_index = " + start_segment_index);
            pw.println(tabs + "// start_segment_index = " + end_segment_index);
            pw.println(tabs + "// segment_index = " + segment_index);
            pw.println(tabs + "// classesSegList=" + classesSegList);
            pw.println();
            Class lastClass = null;
            for (int class_index = 0; class_index < classesSegList.size(); class_index++) {
                Class clss = classesSegList.get(class_index);
                pw.println();
                pw.println(tabs + "// class_index = " + class_index + " clss=" + clss);
                pw.println();
                String clssName = clss.getCanonicalName();
                tabs = openClassNamespace(clss, pw, tabs, lastClass);
                String clssOnlyName = getCppClassName(clss);
                map.put(CLASS_NAME, clssOnlyName);
                map.put("%BASE_CLASS_FULL_NAME%", classToCppBase(clss));

                map.put(FULL_CLASS_NAME, clssName);
                String fcjs = classToJNISignature(clss);
                fcjs = fcjs.substring(1, fcjs.length() - 1);
                map.put(FULL_CLASS_JNI_SIGNATURE, fcjs);
                if (verbose) {
                    System.out.println("fcjs = " + fcjs);
                }
                map.put(OBJECT_CLASS_FULL_NAME, getCppRelativeName(Object.class, clss));
                map.put("%INITIALIZE_CONTEXT%", "");
                map.put("%INITIALIZE_CONTEXT_REF%", "");
                processTemplate(pw, map, CPP_START_CLASSCPP, tabs);
                Constructor constructors[] = clss.getDeclaredConstructors();

                if (!hasNoArgConstructor(constructors)) {
                    if (!Modifier.isAbstract(clss.getModifiers()) && !clss.isInterface()) {
                        pw.println(tabs + clssOnlyName + "::" + clssOnlyName + "() : " + classToCppBase(clss)
                                + "((jobject)NULL,false) {");
                        map.put(JNI_SIGNATURE, "()V");
                        map.put(CONSTRUCTOR_ARGS, "");
                        processTemplate(pw, map, CPP_NEWCPP, tabs);
                        pw.println(tabs + "}");
                        pw.println();
                    }

                }
                for (Constructor c : constructors) {
                    if (checkConstructor(c, clss, classes)) {
                        continue;
                    }
                    Class[] paramClasses = c.getParameterTypes();
                    pw.println(tabs + clssOnlyName + "::" + clssOnlyName
                            + getCppParamDeclarations(paramClasses, clss) + " : " + classToCppBase(clss)
                            + "((jobject)NULL,false) {");
                    tabs = tabs + TAB_STRING;
                    map.put(JNI_SIGNATURE, "(" + getJNIParamSignature(paramClasses) + ")V");
                    map.put(CONSTRUCTOR_ARGS,
                            (paramClasses.length > 0 ? "," : "") + getCppParamNames(paramClasses));
                    processTemplate(pw, map, CPP_NEWCPP, tabs);
                    tabs = tabs.substring(0, tabs.length() - 1);
                    pw.println(tabs + "}");
                    pw.println();
                    if (isConstructorToMakeEasy(c, clss)) {
                        pw.println(tabs + clssOnlyName + "::" + clssOnlyName
                                + getEasyCallCppParamDeclarations(c.getParameterTypes(), clss) + " : "
                                + classToCppBase(clss) + "((jobject)NULL,false) {");
                        processTemplate(pw, map, "cpp_start_easy_constructor.cpp", tabs);
                        for (int paramIndex = 0; paramIndex < paramClasses.length; paramIndex++) {
                            Class paramClasse = paramClasses[paramIndex];
                            String parmName = getParamNameIn(paramClasse, paramIndex);
                            if (isString(paramClasse)) {
                                pw.println(tabs + "jstring " + parmName + " = env->NewStringUTF(easyArg_"
                                        + paramIndex + ");");
                            } else if (isPrimitiveArray(paramClasse)) {
                                String callString = getMethodCallString(paramClasse.getComponentType());
                                pw.println(tabs + getCppArrayType(paramClasse.getComponentType()) + " "
                                        + classToParamNameDecl(paramClasse, paramIndex) + "= env->New"
                                        + callString + "Array(easyArg_" + paramIndex + "_length);");
                                pw.println(tabs + "env->Set" + callString + "ArrayRegion("
                                        + classToParamNameDecl(paramClasse, paramIndex) + ",0,easyArg_"
                                        + paramIndex + "_length,easyArg_" + paramIndex + ");");
                            } else {
                                pw.println(tabs + getCppType(paramClasse, clss) + " "
                                        + classToParamNameDecl(paramClasse, paramIndex) + "= easyArg_"
                                        + paramIndex + ";");
                            }
                        }
                        processTemplate(pw, map, "cpp_new_easy_internals.cpp", tabs);
                        for (int paramIndex = 0; paramIndex < paramClasses.length; paramIndex++) {
                            Class paramClasse = paramClasses[paramIndex];
                            String parmName = getParamNameIn(paramClasse, paramIndex);
                            if (isString(paramClasse)) {
                                pw.println(tabs + "jobjectRefType ref_" + paramIndex
                                        + " = env->GetObjectRefType(" + parmName + ");");
                                pw.println(tabs + "if(ref_" + paramIndex + " == JNIGlobalRefType) {");
                                pw.println(tabs + TAB_STRING + "env->DeleteGlobalRef(" + parmName + ");");
                                pw.println(tabs + "}");
                            } else if (isPrimitiveArray(paramClasse)) {
                                String callString = getMethodCallString(paramClasse.getComponentType());
                                pw.println(tabs + "env->Get" + callString + "ArrayRegion("
                                        + classToParamNameDecl(paramClasse, paramIndex) + ",0,easyArg_"
                                        + paramIndex + "_length,easyArg_" + paramIndex + ");");
                                pw.println(tabs + "jobjectRefType ref_" + paramIndex
                                        + " = env->GetObjectRefType(" + parmName + ");");
                                pw.println(tabs + "if(ref_" + paramIndex + " == JNIGlobalRefType) {");
                                pw.println(tabs + TAB_STRING + "env->DeleteGlobalRef(" + parmName + ");");
                                pw.println(tabs + "}");
                            } else {

                            }
                        }
                        processTemplate(pw, map, "cpp_end_easy_constructor.cpp", tabs);
                        pw.println(tabs + "}");
                    }
                }

                pw.println();
                pw.println(tabs + "// Destructor for " + clssName);
                pw.println(tabs + clssOnlyName + "::~" + clssOnlyName + "() {");
                pw.println(tabs + "\t// Place-holder for later extensibility.");
                pw.println(tabs + "}");
                pw.println();
                Field fa[] = clss.getDeclaredFields();
                for (int findex = 0; findex < fa.length; findex++) {
                    Field field = fa[findex];
                    if (addGetterMethod(field, clss, classes)) {
                        pw.println();
                        pw.println(tabs + "// Field getter for " + field.getName());
                        pw.println(getCppFieldGetterDefinitionStart(tabs, clssOnlyName, field, clss));
                        map.put("%FIELD_NAME%", field.getName());
                        map.put(JNI_SIGNATURE, classToJNISignature(field.getType()));
                        Class returnClass = field.getType();
                        map.put(METHOD_ONFAIL, getOnFailString(returnClass, clss));
                        map.put(METHOD_ARGS, "");
                        map.put("%METHOD_RETURN%", isVoid(returnClass) ? "" : "return");
                        map.put("%METHOD_CALL_TYPE%", getMethodCallString(returnClass));
                        map.put("%METHOD_RETURN_TYPE%", getCppType(returnClass, clss));
                        map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclare(returnClass));
                        String retStore = isVoid(returnClass) ? ""
                                : "retVal= (" + getMethodReturnVarType(returnClass) + ") ";
                        map.put("%METHOD_RETURN_STORE%", retStore);
                        map.put("%METHOD_RETURN_GET%", getMethodReturnGet(tabs, returnClass, clss));

                        if (Modifier.isStatic(field.getModifiers())) {
                            processTemplate(pw, map, "cpp_static_getfield.cpp", tabs);
                        } else {
                            processTemplate(pw, map, "cpp_getfield.cpp", tabs);
                        }

                        pw.println(tabs + "}");
                    }
                    if (addSetterMethod(field, clss, classes)) {
                        pw.println();
                        pw.println(tabs + "// Field setter for " + field.getName());
                        pw.println(getCppFieldSetterDefinitionStart(tabs, clssOnlyName, field, clss));
                        map.put("%FIELD_NAME%", field.getName());
                        map.put(JNI_SIGNATURE, classToJNISignature(field.getType()));
                        Class returnClass = void.class;
                        map.put(METHOD_ONFAIL, getOnFailString(returnClass, clss));
                        Class[] paramClasses = new Class[] { field.getType() };
                        String methodArgs = getCppParamNames(paramClasses);
                        map.put(METHOD_ARGS, (paramClasses.length > 0 ? "," : "") + methodArgs);
                        map.put("%METHOD_RETURN%", isVoid(returnClass) ? "" : "return");
                        map.put("%METHOD_CALL_TYPE%", getMethodCallString(field.getType()));
                        map.put("%METHOD_RETURN_TYPE%", getCppType(returnClass, clss));
                        map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclare(returnClass));
                        String retStore = isVoid(returnClass) ? ""
                                : "retVal= (" + getMethodReturnVarType(returnClass) + ") ";
                        map.put("%METHOD_RETURN_STORE%", retStore);
                        map.put("%METHOD_RETURN_GET%", getMethodReturnGet(tabs, returnClass, clss));

                        if (Modifier.isStatic(field.getModifiers())) {
                            processTemplate(pw, map, "cpp_static_setfield.cpp", tabs);
                        } else {
                            processTemplate(pw, map, "cpp_setfield.cpp", tabs);
                        }

                        pw.println(tabs + "}");
                    }
                }
                Method methods[] = clss.getDeclaredMethods();
                for (int j = 0; j < methods.length; j++) {
                    Method method = methods[j];

                    if (checkMethod(method, classes)) {
                        pw.println();
                        pw.println(getCppMethodDefinitionStart(tabs, clssOnlyName, method, clss));
                        map.put(METHOD_NAME, method.getName());
                        if (fixMethodName(method).contains("equals2")) {
                            if (verbose) {
                                System.out.println("debug me");
                            }
                        }
                        map.put("%JAVA_METHOD_NAME%", method.getName());
                        Class[] paramClasses = method.getParameterTypes();
                        String methodArgs = getCppParamNames(paramClasses);
                        map.put(METHOD_ARGS, (paramClasses.length > 0 ? "," : "") + methodArgs);
                        Class returnClass = method.getReturnType();
                        map.put(JNI_SIGNATURE, "(" + getJNIParamSignature(paramClasses) + ")"
                                + classToJNISignature(returnClass));
                        map.put(METHOD_ONFAIL, getOnFailString(returnClass, clss));
                        map.put("%METHOD_RETURN%", isVoid(returnClass) ? "" : "return");
                        map.put("%METHOD_CALL_TYPE%", getMethodCallString(returnClass));
                        map.put("%METHOD_RETURN_TYPE%", getCppType(returnClass, clss));
                        map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclare(returnClass));
                        String retStore = isVoid(returnClass) ? ""
                                : "retVal= (" + getMethodReturnVarType(returnClass) + ") ";
                        map.put("%METHOD_RETURN_STORE%", retStore);
                        map.put("%METHOD_RETURN_GET%", getMethodReturnGet(tabs, returnClass, clss));
                        tabs += TAB_STRING;
                        if (!Modifier.isStatic(method.getModifiers())) {
                            processTemplate(pw, map, CPP_METHODCPP, tabs);
                        } else {
                            processTemplate(pw, map, CPP_STATIC_METHODCPP, tabs);
                        }
                        tabs = tabs.substring(0, tabs.length() - TAB_STRING.length());
                        pw.println(tabs + "}");
                        if (isArrayStringMethod(method)) {
                            map.put(METHOD_RETURN_STORE,
                                    isVoid(returnClass) ? "" : getCppType(returnClass, clss) + " returnVal=");
                            map.put(METHOD_RETURN_GET, isVoid(returnClass) ? "return ;" : "return returnVal;");
                            processTemplate(pw, map, CPP_EASY_STRING_ARRAY_METHODCPP, tabs);
                        } else if (isMethodToMakeEasy(method)) {
                            pw.println();
                            pw.println(tabs + "// Easy call alternative for " + method.getName());
                            pw.println(getEasyCallCppMethodDefinitionStart(tabs, clssOnlyName, method, clss));
                            tabs += TAB_STRING;
                            map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclareOut(returnClass, clss));
                            processTemplate(pw, map, "cpp_start_easy_method.cpp", tabs);
                            for (int paramIndex = 0; paramIndex < paramClasses.length; paramIndex++) {
                                Class paramClasse = paramClasses[paramIndex];
                                String parmName = getParamNameIn(paramClasse, paramIndex);
                                if (isString(paramClasse)) {
                                    pw.println(tabs + "jstring " + parmName + " = env->NewStringUTF(easyArg_"
                                            + paramIndex + ");");
                                } else if (isPrimitiveArray(paramClasse)) {
                                    String callString = getMethodCallString(paramClasse.getComponentType());
                                    pw.println(tabs + getCppArrayType(paramClasse.getComponentType()) + " "
                                            + classToParamNameDecl(paramClasse, paramIndex) + "= env->New"
                                            + callString + "Array(easyArg_" + paramIndex + "_length);");
                                    pw.println(tabs + "env->Set" + callString + "ArrayRegion("
                                            + classToParamNameDecl(paramClasse, paramIndex) + ",0,easyArg_"
                                            + paramIndex + "_length,easyArg_" + paramIndex + ");");
                                } else {
                                    pw.println(tabs + getCppType(paramClasse, clss) + " "
                                            + classToParamNameDecl(paramClasse, paramIndex) + "= easyArg_"
                                            + paramIndex + ";");
                                }
                            }
                            String methodArgsIn = getCppParamNamesIn(paramClasses);
                            String retStoreOut = isVoid(returnClass) ? ""
                                    : "retVal= (" + getMethodReturnOutVarType(returnClass, clss) + ") ";

                            pw.println(tabs + retStoreOut + fixMethodName(method) + "(" + methodArgsIn + ");");
                            for (int paramIndex = 0; paramIndex < paramClasses.length; paramIndex++) {
                                Class paramClasse = paramClasses[paramIndex];
                                String parmName = getParamNameIn(paramClasse, paramIndex);
                                if (isString(paramClasse)) {
                                    pw.println(tabs + "jobjectRefType ref_" + paramIndex
                                            + " = env->GetObjectRefType(" + parmName + ");");
                                    pw.println(tabs + "if(ref_" + paramIndex + " == JNIGlobalRefType) {");
                                    pw.println(tabs + TAB_STRING + "env->DeleteGlobalRef(" + parmName + ");");
                                    pw.println(tabs + "}");
                                } else if (isPrimitiveArray(paramClasse)) {
                                    String callString = getMethodCallString(paramClasse.getComponentType());
                                    pw.println(tabs + "env->Get" + callString + "ArrayRegion("
                                            + classToParamNameDecl(paramClasse, paramIndex) + ",0,easyArg_"
                                            + paramIndex + "_length,easyArg_" + paramIndex + ");");
                                    pw.println(tabs + "jobjectRefType ref_" + paramIndex
                                            + " = env->GetObjectRefType(" + parmName + ");");
                                    pw.println(tabs + "if(ref_" + paramIndex + " == JNIGlobalRefType) {");
                                    pw.println(tabs + TAB_STRING + "env->DeleteGlobalRef(" + parmName + ");");
                                    pw.println(tabs + "}");
                                } else {

                                }
                            }
                            processTemplate(pw, map, "cpp_end_easy_method.cpp", tabs);
                            if (!isVoid(returnClass)) {
                                pw.println(tabs + "return retVal;");
                            }
                            tabs = tabs.substring(TAB_STRING.length());
                            pw.println(tabs + "}");
                            pw.println();
                        }
                    }
                }
                processTemplate(pw, map, CPP_END_CLASSCPP, tabs);
                tabs = tabs.substring(0, tabs.length() - 1);
                Class nextClass = (class_index < (classesSegList.size() - 1))
                        ? classesSegList.get(class_index + 1)
                        : null;
                tabs = closeClassNamespace(clss, pw, tabs, nextClass);
                lastClass = clss;
            }

            if (segment_index < 1) {
                if (null != nativesClassMap) {
                    for (Entry<String, Class> e : nativesClassMap.entrySet()) {
                        final Class javaClass = e.getValue();
                        final String nativeClassName = e.getKey();
                        map.put(CLASS_NAME, nativeClassName);
                        map.put(FULL_CLASS_NAME, nativeClassName);
                        map.put(FULL_CLASS_JNI_SIGNATURE, nativeClassName);
                        map.put("%BASE_CLASS_FULL_NAME%",
                                "::" + namespace + "::" + getModifiedClassName(javaClass).replace(".", "::"));
                        map.put(OBJECT_CLASS_FULL_NAME, "::" + namespace + "::java::lang::Object");
                        map.put("%INITIALIZE_CONTEXT%", "context=NULL; initContext(NULL,false);");
                        map.put("%INITIALIZE_CONTEXT_REF%", "context=NULL; initContext(objref.context,true);");
                        tabs += TAB_STRING;

                        processTemplate(pw, map, CPP_START_CLASSCPP, tabs);
                        pw.println();
                        pw.println(tabs + nativeClassName + "::" + nativeClassName + "() : "
                                + getModifiedClassName(javaClass).replace(".", "::")
                                + "((jobject)NULL,false) {");
                        tabs += TAB_STRING;
                        pw.println(tabs + "context=NULL;");
                        pw.println(tabs + "initContext(NULL,false);");
                        map.put(JNI_SIGNATURE, "()V");
                        map.put(CONSTRUCTOR_ARGS, "");
                        processTemplate(pw, map, "cpp_new_native.cpp", tabs);
                        tabs = tabs.substring(TAB_STRING.length());
                        pw.println(tabs + "}");
                        pw.println();
                        pw.println(tabs + "// Destructor for " + nativeClassName);
                        pw.println(tabs + nativeClassName + "::~" + nativeClassName + "() {");
                        pw.println(tabs + TAB_STRING + "if(NULL != context) {");
                        pw.println(tabs + TAB_STRING + TAB_STRING + "deleteContext();");
                        pw.println(tabs + TAB_STRING + "}");
                        pw.println(tabs + TAB_STRING + "context=NULL;");
                        pw.println(tabs + "}");
                        pw.println();
                        //                            pw.println(tabs + "public:");
                        //                            pw.println(tabs + nativeClassName + "();");
                        //                            pw.println(tabs + "~" + nativeClassName + "();");
                        tabs = tabs.substring(TAB_STRING.length());
                        //                            Method methods[] = javaClass.getDeclaredMethods();
                        //                            for (int j = 0; j < methods.length; j++) {
                        //                                Method method = methods[j];
                        //                                int modifiers = method.getModifiers();
                        //                                if (!Modifier.isPublic(modifiers)) {
                        //                                    continue;
                        //                                }
                        //                                pw.println(tabs + getCppDeclaration(method, javaClass));
                        //                            }
                        //                            pw.println(tabs + "}; // end class " + nativeClassName);
                        processTemplate(pw, map, CPP_END_CLASSCPP, tabs);
                    }
                }
                processTemplate(pw, map, "cpp_template_end_first.cpp", tabs);
                tabs = "";
                if (null != nativesClassMap) {
                    pw.println("using namespace " + namespace + ";");
                    pw.println("#ifdef __cplusplus");
                    pw.println("extern \"C\" {");
                    pw.println("#endif");
                    int max_method_count = 0;
                    tabs = "";
                    for (Entry<String, Class> e : nativesClassMap.entrySet()) {
                        final Class javaClass = e.getValue();
                        final String nativeClassName = e.getKey();
                        map.put(CLASS_NAME, nativeClassName);
                        map.put(FULL_CLASS_NAME, nativeClassName);
                        map.put("%BASE_CLASS_FULL_NAME%",
                                "::" + namespace + "::" + getModifiedClassName(javaClass).replace(".", "::"));
                        map.put(OBJECT_CLASS_FULL_NAME, "::" + namespace + "::java::lang::Object");
                        map.put(FULL_CLASS_JNI_SIGNATURE, nativeClassName);
                        map.put(METHOD_ONFAIL, "return;");
                        Method methods[] = javaClass.getDeclaredMethods();
                        if (max_method_count < methods.length) {
                            max_method_count = methods.length;
                        }
                        for (int j = 0; j < methods.length; j++) {
                            Method method = methods[j];
                            int modifiers = method.getModifiers();
                            if (!Modifier.isPublic(modifiers)) {
                                continue;
                            }
                            if (Modifier.isAbstract(modifiers) && Modifier.isPublic(modifiers)
                                    && !Modifier.isStatic(modifiers)
                                    //                                        && !method.isDefault()
                                    && !method.isSynthetic()) {
                                Class[] paramClasses = method.getParameterTypes();
                                String methodArgs = getCppParamNames(paramClasses);
                                map.put(METHOD_ARGS, methodArgs);
                                map.put(METHOD_NAME, method.getName());
                                Class returnClass = method.getReturnType();
                                String retStore = isVoid(returnClass) ? ""
                                        : "retVal= (" + getMethodReturnVarType(returnClass) + ") ";
                                map.put(METHOD_ONFAIL, getOnFailString(returnClass, javaClass));
                                map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclare(returnClass));
                                map.put("%METHOD_RETURN_STORE%", retStore);
                                map.put("%METHOD_RETURN_GET%",
                                        getMethodReturnGet(tabs, returnClass, javaClass));
                                pw.println();
                                String paramDecls = getCppParamDeclarations(paramClasses, javaClass);
                                String argsToAdd = method.getParameterTypes().length > 0
                                        ? "," + paramDecls.substring(1, paramDecls.length() - 1)
                                        : "";
                                pw.println("JNIEXPORT " + getCppType(returnClass, javaClass) + " JNICALL Java_"
                                        + nativeClassName + "_" + method.getName()
                                        + "(JNIEnv *env, jobject jthis" + argsToAdd + ") {");
                                tabs = TAB_STRING;
                                processTemplate(pw, map, "cpp_native_wrap.cpp", tabs);
                                tabs = tabs.substring(TAB_STRING.length());
                                pw.println("}");
                                pw.println();
                            }
                        }
                        pw.println("JNIEXPORT void JNICALL Java_" + nativeClassName
                                + "_nativeDelete(JNIEnv *env, jobject jthis) {");
                        tabs += TAB_STRING;
                        map.put(METHOD_ONFAIL, getOnFailString(void.class, javaClass));
                        processTemplate(pw, map, "cpp_native_delete.cpp", tabs);
                        tabs = tabs.substring(TAB_STRING.length());
                        pw.println(tabs + "}");
                        pw.println();
                    }
                    pw.println("#ifdef __cplusplus");
                    pw.println("} // end extern \"C\"");
                    pw.println("#endif");
                    map.put("%MAX_METHOD_COUNT%", Integer.toString(max_method_count + 1));
                    processTemplate(pw, map, "cpp_start_register_native.cpp", tabs);
                    for (Entry<String, Class> e : nativesClassMap.entrySet()) {
                        final Class javaClass = e.getValue();
                        final String nativeClassName = e.getKey();
                        map.put(CLASS_NAME, nativeClassName);
                        map.put(FULL_CLASS_NAME, nativeClassName);
                        map.put("%BASE_CLASS_FULL_NAME%",
                                "::" + namespace + "::" + getModifiedClassName(javaClass).replace(".", "::"));
                        map.put(OBJECT_CLASS_FULL_NAME, "::" + namespace + "::java::lang::Object");
                        processTemplate(pw, map, "cpp_start_register_native_class.cpp", tabs);
                        tabs += TAB_STRING;
                        Method methods[] = javaClass.getDeclaredMethods();
                        int method_number = 0;
                        for (int j = 0; j < methods.length; j++) {
                            Method method = methods[j];
                            int modifiers = method.getModifiers();
                            if (!Modifier.isPublic(modifiers)) {
                                continue;
                            }
                            if (Modifier.isAbstract(modifiers) && Modifier.isPublic(modifiers)
                                    && !Modifier.isStatic(modifiers)
                                    //                                        && !method.isDefault()
                                    && !method.isSynthetic()) {
                                map.put("%METHOD_NUMBER%", Integer.toString(method_number));
                                map.put(METHOD_NAME, method.getName());

                                map.put(JNI_SIGNATURE, "(" + getJNIParamSignature(method.getParameterTypes())
                                        + ")" + classToJNISignature(method.getReturnType()));
                                processTemplate(pw, map, "cpp_register_native_item.cpp", tabs);
                                method_number++;
                            }
                        }
                        map.put("%METHOD_NUMBER%", Integer.toString(method_number));
                        map.put(METHOD_NAME, "nativeDelete");
                        map.put(JNI_SIGNATURE, "()V");
                        processTemplate(pw, map, "cpp_register_native_item.cpp", tabs);
                        map.put("%NUM_NATIVE_METHODS%", Integer.toString(method_number));
                        processTemplate(pw, map, "cpp_end_register_native_class.cpp", tabs);
                        tabs = tabs.substring(TAB_STRING.length());
                    }
                    processTemplate(pw, map, "cpp_end_register_native.cpp", tabs);
                } else {
                    pw.println("// No Native classes : registerNativMethods not needed.");
                    pw.println("static void registerNativeMethods(JNIEnv *env) {}");
                }

            } else {
                processTemplate(pw, map, CPP_TEMPLATE_ENDCPP, tabs);
            }
        }
        if (null != nativesClassMap) {
            tabs = "";
            for (Entry<String, Class> e : nativesClassMap.entrySet()) {
                String nativeClassName = e.getKey();
                File nativeClassHeaderFile = new File(
                        namespace.toLowerCase() + "_" + nativeClassName.toLowerCase() + ".h");
                map.put("%NATIVE_CLASS_HEADER%", nativeClassHeaderFile.getName());
                map.put(CLASS_NAME, nativeClassName);
                if (nativeClassHeaderFile.exists()) {
                    if (verbose) {
                        System.out.println("skipping " + nativeClassHeaderFile.getCanonicalPath()
                                + " since it already exists.");
                    }
                } else {
                    try (PrintWriter pw = new PrintWriter(new FileWriter(nativeClassHeaderFile))) {
                        processTemplate(pw, map, "header_native_imp.h", tabs);
                    }
                }
                File nativeClassCppFile = new File(
                        namespace.toLowerCase() + "_" + nativeClassName.toLowerCase() + ".cpp");
                if (nativeClassCppFile.exists()) {
                    if (verbose) {
                        System.out.println("skipping " + nativeClassCppFile.getCanonicalPath()
                                + " since it already exists.");
                    }
                } else {
                    try (PrintWriter pw = new PrintWriter(new FileWriter(nativeClassCppFile))) {
                        processTemplate(pw, map, "cpp_native_imp_start.cpp", tabs);
                        Class javaClass = e.getValue();
                        Method methods[] = javaClass.getDeclaredMethods();
                        int method_number = 0;
                        for (int j = 0; j < methods.length; j++) {
                            Method method = methods[j];
                            int modifiers = method.getModifiers();
                            if (!Modifier.isPublic(modifiers)) {
                                continue;
                            }
                            if (Modifier.isAbstract(modifiers) && Modifier.isPublic(modifiers)
                                    && !Modifier.isStatic(modifiers)
                                    //                                        && !method.isDefault()
                                    && !method.isSynthetic()) {
                                Class[] paramClasses = method.getParameterTypes();
                                //                                    String methodArgs = getCppParamNames(paramClasses);
                                String paramDecls = getCppParamDeclarations(paramClasses, javaClass);
                                String methodArgs = method.getParameterTypes().length > 0
                                        ? paramDecls.substring(1, paramDecls.length() - 1)
                                        : "";
                                map.put(METHOD_ARGS, methodArgs);
                                map.put(METHOD_NAME, method.getName());
                                Class returnClass = method.getReturnType();
                                String retStore = isVoid(returnClass) ? ""
                                        : "retVal= (" + getMethodReturnVarType(returnClass) + ") ";
                                map.put(METHOD_ONFAIL, getOnFailString(returnClass, javaClass));
                                map.put("%RETURN_TYPE%", getCppType(returnClass, javaClass));
                                map.put("%RETURN_VAR_DECLARE%", getMethodReturnVarDeclare(returnClass));
                                map.put("%METHOD_RETURN_STORE%", retStore);
                                map.put("%METHOD_RETURN_GET%",
                                        getMethodReturnGet(tabs, returnClass, javaClass));
                                processTemplate(pw, map, "cpp_native_imp_stub.cpp", tabs);
                            }
                        }
                        processTemplate(pw, map, "cpp_native_imp_end.cpp", tabs);
                    }
                }
            }
        }
    }

    main_completed = true;
}

---

From source file:org.apache.nifi.processors.standard.TailFile.java

private FileChannel createReader(final File file, final long position) {
    final FileChannel reader;

    try {//from   ww  w.j a  va 2 s.  c o m
        reader = FileChannel.open(file.toPath(), StandardOpenOption.READ);
    } catch (final IOException ioe) {
        getLogger().warn(
                "Unable to open file {}; will attempt to access file again after the configured Yield Duration has elapsed: {}",
                new Object[] { file, ioe });
        return null;
    }

    getLogger().debug("Created FileChannel {} for {}", new Object[] { reader, file });

    try {
        reader.position(position);
    } catch (final IOException ioe) {
        getLogger().error("Failed to read from {} due to {}", new Object[] { file, ioe });

        try {
            reader.close();
            getLogger().debug("Closed FileChannel {}", new Object[] { reader });
        } catch (final IOException ioe2) {
        }

        return null;
    }

    return reader;
}

---

From source file:org.apache.hadoop.hive.ql.QTestUtil.java

public static void setupMetaStoreTableColumnStatsFor30TBTPCDSWorkload(HiveConf conf) {
    Connection conn = null;//from  www .j  a v a2 s  . c  om
    ArrayList<Statement> statements = new ArrayList<Statement>(); // list of Statements, PreparedStatements

    try {
        Properties props = new Properties(); // connection properties
        props.put("user", conf.get("javax.jdo.option.ConnectionUserName"));
        props.put("password", conf.get("javax.jdo.option.ConnectionPassword"));
        conn = DriverManager.getConnection(conf.get("javax.jdo.option.ConnectionURL"), props);
        ResultSet rs = null;
        Statement s = conn.createStatement();

        if (LOG.isDebugEnabled()) {
            LOG.debug("Connected to metastore database ");
        }

        String mdbPath = AbstractCliConfig.HIVE_ROOT + "/data/files/tpcds-perf/metastore_export/";

        // Setup the table column stats
        BufferedReader br = new BufferedReader(new FileReader(new File(
                AbstractCliConfig.HIVE_ROOT + "/metastore/scripts/upgrade/derby/022-HIVE-11107.derby.sql")));
        String command;

        s.execute("DROP TABLE APP.TABLE_PARAMS");
        s.execute("DROP TABLE APP.TAB_COL_STATS");
        // Create the column stats table
        while ((command = br.readLine()) != null) {
            if (!command.endsWith(";")) {
                continue;
            }
            if (LOG.isDebugEnabled()) {
                LOG.debug("Going to run command : " + command);
            }
            try {
                PreparedStatement psCommand = conn.prepareStatement(command.substring(0, command.length() - 1));
                statements.add(psCommand);
                psCommand.execute();
                if (LOG.isDebugEnabled()) {
                    LOG.debug("successfully completed " + command);
                }
            } catch (SQLException e) {
                LOG.info("Got SQL Exception " + e.getMessage());
            }
        }
        br.close();

        java.nio.file.Path tabColStatsCsv = FileSystems.getDefault().getPath(mdbPath, "csv",
                "TAB_COL_STATS.txt.bz2");
        java.nio.file.Path tabParamsCsv = FileSystems.getDefault().getPath(mdbPath, "csv",
                "TABLE_PARAMS.txt.bz2");

        // Set up the foreign key constraints properly in the TAB_COL_STATS data
        String tmpBaseDir = System.getProperty(TEST_TMP_DIR_PROPERTY);
        java.nio.file.Path tmpFileLoc1 = FileSystems.getDefault().getPath(tmpBaseDir, "TAB_COL_STATS.txt");
        java.nio.file.Path tmpFileLoc2 = FileSystems.getDefault().getPath(tmpBaseDir, "TABLE_PARAMS.txt");

        class MyComp implements Comparator<String> {
            @Override
            public int compare(String str1, String str2) {
                if (str2.length() != str1.length()) {
                    return str2.length() - str1.length();
                }
                return str1.compareTo(str2);
            }
        }

        final SortedMap<String, Integer> tableNameToID = new TreeMap<String, Integer>(new MyComp());

        rs = s.executeQuery("SELECT * FROM APP.TBLS");
        while (rs.next()) {
            String tblName = rs.getString("TBL_NAME");
            Integer tblId = rs.getInt("TBL_ID");
            tableNameToID.put(tblName, tblId);

            if (LOG.isDebugEnabled()) {
                LOG.debug("Resultset : " + tblName + " | " + tblId);
            }
        }

        final Map<String, Map<String, String>> data = new HashMap<>();
        rs = s.executeQuery("select TBLS.TBL_NAME, a.COLUMN_NAME, a.TYPE_NAME from  "
                + "(select COLUMN_NAME, TYPE_NAME, SDS.SD_ID from APP.COLUMNS_V2 join APP.SDS on SDS.CD_ID = COLUMNS_V2.CD_ID) a"
                + " join APP.TBLS on  TBLS.SD_ID = a.SD_ID");
        while (rs.next()) {
            String tblName = rs.getString(1);
            String colName = rs.getString(2);
            String typeName = rs.getString(3);
            Map<String, String> cols = data.get(tblName);
            if (null == cols) {
                cols = new HashMap<>();
            }
            cols.put(colName, typeName);
            data.put(tblName, cols);
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(
                new BZip2CompressorInputStream(Files.newInputStream(tabColStatsCsv, StandardOpenOption.READ))));

        Stream<String> replaced = reader.lines().parallel().map(str -> {
            String[] splits = str.split(",");
            String tblName = splits[0];
            String colName = splits[1];
            Integer tblID = tableNameToID.get(tblName);
            StringBuilder sb = new StringBuilder(
                    "default@" + tblName + "@" + colName + "@" + data.get(tblName).get(colName) + "@");
            for (int i = 2; i < splits.length; i++) {
                sb.append(splits[i] + "@");
            }
            // Add tbl_id and empty bitvector
            return sb.append(tblID).append("@").toString();
        });

        Files.write(tmpFileLoc1, (Iterable<String>) replaced::iterator);
        replaced.close();
        reader.close();

        BufferedReader reader2 = new BufferedReader(new InputStreamReader(
                new BZip2CompressorInputStream(Files.newInputStream(tabParamsCsv, StandardOpenOption.READ))));
        final Map<String, String> colStats = new ConcurrentHashMap<>();
        Stream<String> replacedStream = reader2.lines().parallel().map(str -> {
            String[] splits = str.split("_@");
            String tblName = splits[0];
            Integer tblId = tableNameToID.get(tblName);
            Map<String, String> cols = data.get(tblName);
            StringBuilder sb = new StringBuilder();
            sb.append("{\"COLUMN_STATS\":{");
            for (String colName : cols.keySet()) {
                sb.append("\"" + colName + "\":\"true\",");
            }
            sb.append("},\"BASIC_STATS\":\"true\"}");
            colStats.put(tblId.toString(), sb.toString());

            return tblId.toString() + "@" + splits[1];
        });

        Files.write(tmpFileLoc2, (Iterable<String>) replacedStream::iterator);
        Files.write(tmpFileLoc2,
                (Iterable<String>) colStats.entrySet().stream()
                        .map(map -> map.getKey() + "@COLUMN_STATS_ACCURATE@" + map.getValue())::iterator,
                StandardOpenOption.APPEND);

        replacedStream.close();
        reader2.close();
        // Load the column stats and table params with 30 TB scale
        String importStatement1 = "CALL SYSCS_UTIL.SYSCS_IMPORT_TABLE(null, '" + "TAB_COL_STATS" + "', '"
                + tmpFileLoc1.toAbsolutePath().toString() + "', '@', null, 'UTF-8', 1)";
        String importStatement2 = "CALL SYSCS_UTIL.SYSCS_IMPORT_TABLE(null, '" + "TABLE_PARAMS" + "', '"
                + tmpFileLoc2.toAbsolutePath().toString() + "', '@', null, 'UTF-8', 1)";
        try {
            PreparedStatement psImport1 = conn.prepareStatement(importStatement1);
            if (LOG.isDebugEnabled()) {
                LOG.debug("Going to execute : " + importStatement1);
            }
            statements.add(psImport1);
            psImport1.execute();
            if (LOG.isDebugEnabled()) {
                LOG.debug("successfully completed " + importStatement1);
            }
            PreparedStatement psImport2 = conn.prepareStatement(importStatement2);
            if (LOG.isDebugEnabled()) {
                LOG.debug("Going to execute : " + importStatement2);
            }
            statements.add(psImport2);
            psImport2.execute();
            if (LOG.isDebugEnabled()) {
                LOG.debug("successfully completed " + importStatement2);
            }
        } catch (SQLException e) {
            LOG.info("Got SQL Exception  " + e.getMessage());
        }
    } catch (FileNotFoundException e1) {
        LOG.info("Got File not found Exception " + e1.getMessage());
    } catch (IOException e1) {
        LOG.info("Got IOException " + e1.getMessage());
    } catch (SQLException e1) {
        LOG.info("Got SQLException " + e1.getMessage());
    } finally {
        // Statements and PreparedStatements
        int i = 0;
        while (!statements.isEmpty()) {
            // PreparedStatement extend Statement
            Statement st = statements.remove(i);
            try {
                if (st != null) {
                    st.close();
                    st = null;
                }
            } catch (SQLException sqle) {
            }
        }

        //Connection
        try {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        } catch (SQLException sqle) {
        }
    }
}

---

From source file:org.neo4j.io.pagecache.PageCacheTest.java

@Test(timeout = SEMI_LONG_TIMEOUT_MILLIS)
public void mustIgnoreCertainOpenOptions() throws Exception {
    getPageCache(fs, maxPages, pageCachePageSize, PageCacheTracer.NULL);
    try (PagedFile pf = pageCache.map(file("a"), filePageSize, StandardOpenOption.READ,
            StandardOpenOption.WRITE, StandardOpenOption.APPEND, StandardOpenOption.SPARSE);
            PageCursor cursor = pf.io(0, PF_SHARED_WRITE_LOCK)) {
        assertTrue(cursor.next());//  w  w w  .  j  a v  a2  s  .co  m
    }
}

---

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