Example usage for java.io RandomAccessFile RandomAccessFile

List of usage examples for java.io RandomAccessFile RandomAccessFile

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Introduction

In this page you can find the example usage for java.io RandomAccessFile RandomAccessFile.

Prototype

public RandomAccessFile(File file, String mode) throws FileNotFoundException

Source Link

Document

Creates a random access file stream to read from, and optionally to write to, the file specified by the File argument.

Usage

From source file:com.l2jfree.gameserver.geodata.pathfinding.geonodes.GeoPathFinding.java

private void LoadPathNodeFile(byte rx, byte ry) {
    String fname = "./data/pathnode/" + rx + "_" + ry + ".pn";
    short regionoffset = getRegionOffset(rx, ry);
    _log.info("PathFinding Engine: - Loading: " + fname + " -> region offset: " + regionoffset + "X: " + rx
            + " Y: " + ry);
    File Pn = new File(fname);
    int node = 0, size, index = 0;
    FileChannel roChannel = null;
    try {//from   www . ja va  2s  .c  om
        // Create a read-only memory-mapped file
        roChannel = new RandomAccessFile(Pn, "r").getChannel();
        size = (int) roChannel.size();
        MappedByteBuffer nodes;
        if (Config.FORCE_GEODATA) //Force O/S to Loads this buffer's content into physical memory.
            //it is not guarantee, because the underlying operating system may have paged out some of the buffer's data
            nodes = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, size).load();
        else
            nodes = roChannel.map(FileChannel.MapMode.READ_ONLY, 0, size);

        // Indexing pathnode files, so we will know where each block starts
        IntBuffer indexs = IntBuffer.allocate(65536);

        while (node < 65536) {
            byte layer = nodes.get(index);
            indexs.put(node++, index);
            index += layer * 10 + 1;
        }
        _pathNodesIndex.set(regionoffset, indexs);
        _pathNodes.set(regionoffset, nodes);
    } catch (Exception e) {
        _log.warn("Failed to Load PathNode File: " + fname + "\n", e);
    } finally {
        try {
            if (roChannel != null)
                roChannel.close();
        } catch (Exception e) {
        }
    }

}

From source file:edu.harvard.i2b2.patientMapping.ui.PatientIDConversionJFrame.java

private void jConvertButtonActionPerformed(java.awt.event.ActionEvent evt) {
    int inputIndex = jInputComboBox.getSelectedIndex() + 1;
    int outputIndex = jOutputComboBox.getSelectedIndex() + 1;

    if ((inputIndex == 2 && outputIndex != 2) || (inputIndex == 4 && outputIndex != 5)) {
        Display.getDefault().syncExec(new Runnable() {
            public void run() {
                MessageBox messageBox = new MessageBox(new Shell(), SWT.ICON_WARNING | SWT.OK);

                messageBox.setText("Not valid selections");
                messageBox.setMessage("Input and output pair selected is not valid.");
                messageBox.open();//from   w ww. j  a v  a  2  s .  com

            }
        });
        return;
    }
    //jConvertButton.setCursor(new Cursor(Cursor.WAIT_CURSOR));
    String inputFile = this.jInputFilePathTextField.getText();
    if (inputFile == null || inputFile.equalsIgnoreCase("")) {
        JOptionPane.showMessageDialog(this, "Please select a input file.");
        return;
    }

    final String outputFile = this.jOutputFilePathTextField.getText();
    if (outputFile == null || outputFile.equalsIgnoreCase("")) {
        JOptionPane.showMessageDialog(this, "Please select an output file.");
        return;
    }

    final File oDelete = new File(outputFile);

    Display.getDefault().syncExec(new Runnable() {
        public void run() {
            if (oDelete != null && oDelete.exists()) {
                MessageBox messageBox = new MessageBox(new Shell(), SWT.ICON_WARNING | SWT.YES | SWT.NO);

                messageBox.setText("Warning");
                messageBox.setMessage(outputFile + " already exists,\nDo you want to replace it?");
                int buttonID = messageBox.open();
                switch (buttonID) {
                case SWT.YES:
                    oDelete.delete();
                    break;
                case SWT.NO:
                    return;
                case SWT.CANCEL:
                    // does nothing ...
                }
            }
        }
    });
    log.info("Selected output file: " + outputFile);

    //if (fileName != null && fileName.trim().length() > 0) {
    log.info("Selected input file: " + inputFile);

    PatientIDConversionFactory converter = new PatientIDConversionFactory();
    if ((inputIndex == 1 && (outputIndex == 2 || outputIndex == 3))
            || (inputIndex == 3 && (outputIndex == 5 || outputIndex == 6))) {
        converter.sitename(jSiteTextField.getText());
    }
    FileReader fr;
    BufferedReader inbr = null;
    RandomAccessFile f = null;
    //append(f, resultFile.toString());
    jConvertButton.setCursor(new Cursor(Cursor.WAIT_CURSOR));
    try {
        f = new RandomAccessFile(outputFile, "rw");
        fr = new FileReader(new File(inputFile));
        inbr = new BufferedReader(fr);
        //String line = inbr.readLine();
        /*if(!line.startsWith("@@i2b2 patient mapping file@@")) {
           java.awt.EventQueue.invokeLater(new Runnable() {
          public void run() {
             //setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
             JOptionPane.showMessageDialog(jLabel1, "The file is not in a valid format.", "Error importing", JOptionPane.ERROR_MESSAGE);
          }
           });
           //JOptionPane.showMessageDialog(null, "The file is not a valid.", "Error importing", JOptionPane.ERROR_MESSAGE);
           return;
        }*/
        String line = inbr.readLine();
        //log.info("column name: "+line);         

        int rowCount = 0;

        while (line != null) {
            log.info(line);
            String outputline = "";
            /*String[] cols = line.split(",");
            String id;
            if(cols.length < 2) {
               id = "";
            }
            else {
               id = converter.convert(cols[1], 1, 1);               
            }*/
            outputline = converter.convertLine(line, inputIndex, outputIndex);
            append(f, outputline);//cols[0]+","+id+"\n");
            rowCount++;
            line = inbr.readLine();
        }

        log.info("From " + inputIndex + " to " + outputIndex + " total lines: " + rowCount);
        inbr.close();
        f.close();
    } catch (Exception e) {
        e.printStackTrace();
        if (inbr != null) {
            try {
                inbr.close();
            } catch (Exception e1) {
            }
        }

        if (f != null) {
            try {
                f.close();
            } catch (Exception e1) {
            }
        }
    }

    jConvertButton.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
}

From source file:com.nary.Debug.java

private void intPrintln(String Line) {
    if (!bOn)//from   w ww.ja va 2  s. com
        return;

    String D = com.nary.util.Date.formatNow("dd/MM/yy HH:mm.ss: ") + Line;

    //--[ Write it out to the System Console
    if (bSystemOut)
        System.out.println(D);

    //--[ Write it out to the Servlet Log
    if (servletContext != null)
        servletContext.log(Line);

    D += "\r\n";

    //--[ Write it out to file
    if (bFile) {
        try {

            if (OutFile == null) {
                //-- Log file is closed; lets open it up
                if (filename == null) {
                    return; // we're screwed--give up
                }
                OutFile = new RandomAccessFile(filename, "rw");
                logFileSize = OutFile.length();
                OutFile.seek(logFileSize);
                OutFile.writeBytes("\r\n]--- Logging Started ------[\r\n");
            }

            //-- Write out the line to the logfile
            OutFile.writeBytes(D);
            logFileSize += D.length();

            if (logFileSize > maxLogFileSize)
                rotateLogFile();

        } catch (IOException E) {
            if (OutFile != null) {
                try {
                    OutFile.close();
                } catch (IOException ignore) {
                }
            }
            OutFile = null;
        }
    }
}

From source file:com.phonegap.FileUtils.java

/**
 * Write contents of file.//from w ww .  ja  va2 s . c o m
 * 
 * @param filename         The name of the file.
 * @param data            The contents of the file.
 * @param offset         The position to begin writing the file.         
 * @throws FileNotFoundException, IOException
 */
public long write(String filename, String data, long offset) throws FileNotFoundException, IOException {
    RandomAccessFile file = new RandomAccessFile(filename, "rw");
    file.seek(offset);
    file.writeBytes(data);
    file.close();

    return data.length();
}

From source file:com.vtls.opensource.jhove.JHOVEDocumentFactory.java

/**
 * Populate the representation information for JHOVE Document from a specific File.
 * @param representation a RepInfo // ww  w  . ja  va 2 s  .  c o  m
 * @param file  a File containing the representation information
 * @throws IOException
 */
private void populateRepresentation(RepInfo representation, File file) throws IOException {
    // Iterate through the modules and process.
    Iterator iterator = m_module_list.iterator();
    while (iterator.hasNext()) {
        Module module = (Module) iterator.next();
        module.setBase(m_jhove);
        module.setVerbosity(Module.MINIMUM_VERBOSITY);

        // m_logger.info(module.toString());
        RepInfo persistent = (RepInfo) representation.clone();

        if (module.hasFeature("edu.harvard.hul.ois.jhove.canValidate")) {
            try {
                module.applyDefaultParams();
                if (module.isRandomAccess()) {
                    RandomAccessFile ra_file = new RandomAccessFile(file, "r");
                    module.parse(ra_file, persistent);
                    ra_file.close();
                } else {
                    InputStream stream = new FileInputStream(file);
                    int parse = module.parse(stream, persistent, 0);
                    while (parse != 0) {
                        stream.close();
                        stream = new FileInputStream(file);
                        parse = module.parse(stream, persistent, parse);
                    }
                    stream.close();
                }

                if (persistent.getWellFormed() == RepInfo.TRUE)
                    representation.copy(persistent);
                else
                    representation.setSigMatch(persistent.getSigMatch());
            } catch (Exception e) {
                continue;
            }
        }
    }
}

From source file:com.whizzosoftware.hobson.bootstrap.api.hub.OSGIHubManager.java

@Override
public LogContent getLog(String userId, String hubId, long startIndex, long endIndex) {
    String path = getLogFilePath();

    try (RandomAccessFile file = new RandomAccessFile(path, "r")) {
        long fileLength = file.length();

        if (startIndex == -1) {
            startIndex = fileLength - endIndex - 1;
            endIndex = fileLength - 1;/* w ww.j a  v a2  s . c  o  m*/
        }
        if (endIndex == -1) {
            endIndex = fileLength - 1;
        }
        if (startIndex > fileLength - 1) {
            throw new HobsonRuntimeException("Requested start index is greater than file length");
        }
        if (endIndex > fileLength - 1) {
            throw new HobsonRuntimeException("Requested end index is greater than file length");
        }

        // jump to start point in file
        file.seek(startIndex);

        // read in appropriate number of bytes
        byte buffer[] = new byte[(int) (endIndex - startIndex)];
        file.read(buffer);

        return new LogContent(startIndex, endIndex, buffer);
    } catch (IOException e) {
        throw new HobsonRuntimeException("Unable to read log file", e);
    }
}

From source file:com.diffplug.gradle.FileMisc.java

/** Concats the first files and writes them to the last file. */
public static void concat(Iterable<File> toMerge, File dst) throws IOException {
    try (FileChannel dstChannel = FileChannel.open(dst.toPath(), StandardOpenOption.CREATE,
            StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE)) {
        for (File file : toMerge) {
            try (RandomAccessFile raf = new RandomAccessFile(file, "r")) {
                FileChannel channel = raf.getChannel();
                dstChannel.write(channel.map(FileChannel.MapMode.READ_ONLY, 0, raf.length()));
            }//  w  ww  .  j a  v  a 2 s.  co  m
        }
    }
}

From source file:dk.statsbiblioteket.util.LineReaderTest.java

public void dumpSequentialRA() throws Exception {
    RandomAccessFile ra = new RandomAccessFile(logfile, "r");
    for (int i = 0; i < LINES; i++) {
        ra.readLine();/*ww w.j a  v a2 s .c  o  m*/
    }
    Profiler profiler = new Profiler();
    profiler.setExpectedTotal(SEQUENTIAL_RUNS);
    for (int i = 0; i < SEQUENTIAL_RUNS; i++) {
        ra.seek(0);
        for (int j = 0; j < LINES; j++) {
            ra.readLine();
        }
        profiler.beat();
    }
    System.out.println("Performed " + SEQUENTIAL_RUNS + " full RA reads at "
            + Math.round(profiler.getBps(false)) + " reads/second");
}