Example usage for java.io File exists

Introduction

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

Prototype

public boolean exists() 

Source Link

Document

Tests whether the file or directory denoted by this abstract pathname exists.

Usage

From source file:act.installer.reachablesexplorer.PatentFinder.java

public static void main(String[] args) throws Exception {
    CLIUtil cliUtil = new CLIUtil(Loader.class, HELP_MESSAGE, OPTION_BUILDERS);
    CommandLine cl = cliUtil.parseCommandLine(args);

    String host = cl.getOptionValue(OPTION_DB_HOST, DEFAULT_HOST);
    Integer port = Integer.parseInt(cl.getOptionValue(OPTION_DB_PORT, DEFAULT_PORT.toString()));
    String targetDB = cl.getOptionValue(OPTION_TARGET_DB, DEFAULT_TARGET_DATABASE);
    String collection = cl.getOptionValue(OPTION_TARGET_REACHABLES_COLLECTION, DEFAULT_TARGET_COLLECTION);
    LOGGER.info("Connecting to %s:%d/%s, using collection %s", host, port, targetDB, collection);

    Loader loader = new Loader(host, port, UNUSED_SOURCE_DB, targetDB, collection, UNUSED_SEQUENCES_COLLECTION,
            UNUSED_ASSETS_DIR);/* w w w .  j av  a 2 s .  c o  m*/

    File indexesTopDir = new File(cl.getOptionValue(OPTION_PATENT_INDEX_DIR, DEFAULT_PATENT_INDEX_LOCATION));
    if (!indexesTopDir.exists() || !indexesTopDir.isDirectory()) {
        cliUtil.failWithMessage("Index top-level directory at %s is not a directory",
                indexesTopDir.getAbsolutePath());
    }

    LOGGER.info("Using index top level dir: %s", indexesTopDir.getAbsolutePath());

    PatentFinder finder = new PatentFinder();
    try (Searcher searcher = Searcher.Factory.getInstance().build(indexesTopDir)) {
        finder.run(loader, searcher);
    }
}

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From source file:com.linkedin.helix.examples.ExampleProcess.java

public static void main(String[] args) throws Exception {
    String zkConnectString = "localhost:2181";
    String clusterName = "storage-integration-cluster";
    String instanceName = "localhost_8905";
    String file = null;/*from   w ww.j  a  v  a 2 s.  co m*/
    String stateModelValue = "MasterSlave";
    int delay = 0;
    boolean skipZeroArgs = true;// false is for dev testing
    if (!skipZeroArgs || args.length > 0) {
        CommandLine cmd = processCommandLineArgs(args);
        zkConnectString = cmd.getOptionValue(zkServer);
        clusterName = cmd.getOptionValue(cluster);

        String host = cmd.getOptionValue(hostAddress);
        String portString = cmd.getOptionValue(hostPort);
        int port = Integer.parseInt(portString);
        instanceName = host + "_" + port;

        file = cmd.getOptionValue(configFile);
        if (file != null) {
            File f = new File(file);
            if (!f.exists()) {
                System.err.println("static config file doesn't exist");
                System.exit(1);
            }
        }

        stateModelValue = cmd.getOptionValue(stateModel);
        if (cmd.hasOption(transDelay)) {
            try {
                delay = Integer.parseInt(cmd.getOptionValue(transDelay));
                if (delay < 0) {
                    throw new Exception("delay must be positive");
                }
            } catch (Exception e) {
                e.printStackTrace();
                delay = 0;
            }
        }
    }
    // Espresso_driver.py will consume this
    System.out.println("Starting Process with ZK:" + zkConnectString);

    ExampleProcess process = new ExampleProcess(zkConnectString, clusterName, instanceName, file,
            stateModelValue, delay);

    process.start();
    Thread.currentThread().join();
}

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From source file:image.writer.ImageWriterExample2.java

/**
 * Command-line interface// www.  j a va2s . com
 * @param args command-line arguments
 */
public static void main(String[] args) {
    try {
        File targetDir;
        if (args.length >= 1) {
            targetDir = new File(args[0]);
        } else {
            targetDir = new File(".");
        }
        if (!targetDir.exists()) {
            System.err.println("Target Directory does not exist: " + targetDir);
        }
        File outputFile = new File(targetDir, "eps-example2.tif");
        ImageWriterExample2 app = new ImageWriterExample2();
        app.generateBitmapUsingJava2D(outputFile, "image/tiff");
        System.out.println("File written: " + outputFile.getCanonicalPath());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:cc.twittertools.search.local.RunQueries.java

@SuppressWarnings("static-access")
public static void main(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(//from   ww  w. jav  a 2  s  .  c  o m
            OptionBuilder.withArgName("path").hasArg().withDescription("index location").create(INDEX_OPTION));
    options.addOption(OptionBuilder.withArgName("num").hasArg().withDescription("number of results to return")
            .create(NUM_RESULTS_OPTION));
    options.addOption(OptionBuilder.withArgName("file").hasArg()
            .withDescription("file containing topics in TREC format").create(QUERIES_OPTION));
    options.addOption(OptionBuilder.withArgName("similarity").hasArg()
            .withDescription("similarity to use (BM25, LM)").create(SIMILARITY_OPTION));
    options.addOption(
            OptionBuilder.withArgName("string").hasArg().withDescription("runtag").create(RUNTAG_OPTION));
    options.addOption(new Option(VERBOSE_OPTION, "print out complete document"));

    CommandLine cmdline = null;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        System.exit(-1);
    }

    if (!cmdline.hasOption(QUERIES_OPTION) || !cmdline.hasOption(INDEX_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(RunQueries.class.getName(), options);
        System.exit(-1);
    }

    File indexLocation = new File(cmdline.getOptionValue(INDEX_OPTION));
    if (!indexLocation.exists()) {
        System.err.println("Error: " + indexLocation + " does not exist!");
        System.exit(-1);
    }

    String runtag = cmdline.hasOption(RUNTAG_OPTION) ? cmdline.getOptionValue(RUNTAG_OPTION) : DEFAULT_RUNTAG;

    String topicsFile = cmdline.getOptionValue(QUERIES_OPTION);

    int numResults = 1000;
    try {
        if (cmdline.hasOption(NUM_RESULTS_OPTION)) {
            numResults = Integer.parseInt(cmdline.getOptionValue(NUM_RESULTS_OPTION));
        }
    } catch (NumberFormatException e) {
        System.err.println("Invalid " + NUM_RESULTS_OPTION + ": " + cmdline.getOptionValue(NUM_RESULTS_OPTION));
        System.exit(-1);
    }

    String similarity = "LM";
    if (cmdline.hasOption(SIMILARITY_OPTION)) {
        similarity = cmdline.getOptionValue(SIMILARITY_OPTION);
    }

    boolean verbose = cmdline.hasOption(VERBOSE_OPTION);

    PrintStream out = new PrintStream(System.out, true, "UTF-8");

    IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
    IndexSearcher searcher = new IndexSearcher(reader);

    if (similarity.equalsIgnoreCase("BM25")) {
        searcher.setSimilarity(new BM25Similarity());
    } else if (similarity.equalsIgnoreCase("LM")) {
        searcher.setSimilarity(new LMDirichletSimilarity(2500.0f));
    }

    QueryParser p = new QueryParser(Version.LUCENE_43, StatusField.TEXT.name, IndexStatuses.ANALYZER);

    TrecTopicSet topics = TrecTopicSet.fromFile(new File(topicsFile));
    for (TrecTopic topic : topics) {
        Query query = p.parse(topic.getQuery());
        Filter filter = NumericRangeFilter.newLongRange(StatusField.ID.name, 0L, topic.getQueryTweetTime(),
                true, true);

        TopDocs rs = searcher.search(query, filter, numResults);

        int i = 1;
        for (ScoreDoc scoreDoc : rs.scoreDocs) {
            Document hit = searcher.doc(scoreDoc.doc);
            out.println(String.format("%s Q0 %s %d %f %s", topic.getId(),
                    hit.getField(StatusField.ID.name).numericValue(), i, scoreDoc.score, runtag));
            if (verbose) {
                out.println("# " + hit.toString().replaceAll("[\\n\\r]+", " "));
            }
            i++;
        }
    }
    reader.close();
    out.close();
}

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From source file:de.petendi.ethereum.secure.proxy.Application.java

public static void main(String[] args) {

    try {//from w ww  . ja  v  a 2  s. c o m
        cmdLineResult = new CmdLineResult();
        cmdLineResult.parseArguments(args);
    } catch (CmdLineException e) {
        System.out.println(e.getMessage());
        System.out.println("Usage:");
        cmdLineResult.printExample();
        System.exit(-1);
        return;
    }

    File workingDirectory = new File(System.getProperty("user.home"));
    if (cmdLineResult.getWorkingDirectory().length() > 0) {
        workingDirectory = new File(cmdLineResult.getWorkingDirectory()).getAbsoluteFile();
    }

    ArgumentList argumentList = new ArgumentList();
    argumentList.setWorkingDirectory(workingDirectory);
    File certificate = new File(workingDirectory, "seccoco-secured/cert.p12");
    if (certificate.exists()) {
        char[] passwd = null;
        if (cmdLineResult.getPassword() != null) {
            System.out.println("Using password from commandline argument - DON'T DO THIS IN PRODUCTION !!");
            passwd = cmdLineResult.getPassword().toCharArray();
        } else {
            Console console = System.console();
            if (console != null) {
                passwd = console.readPassword("[%s]", "Enter application password:");
            } else {
                System.out.print("No suitable console found for entering password");
                System.exit(-1);
            }
        }
        argumentList.setTokenPassword(passwd);
    }
    try {
        SeccocoFactory seccocoFactory = new SeccocoFactory("seccoco-secured", argumentList);
        seccoco = seccocoFactory.create();
    } catch (InitializationException e) {
        System.out.println(e.getMessage());
        System.exit(-1);
    }
    try {
        System.out.println("Connecting to Ethereum RPC at " + cmdLineResult.getUrl());
        URL url = new URL(cmdLineResult.getUrl());
        HashMap<String, String> headers = new HashMap<String, String>();
        headers.put("Content-Type", "application/json");
        String additionalHeaders = cmdLineResult.getAdditionalHeaders();
        if (additionalHeaders != null) {
            StringTokenizer tokenizer = new StringTokenizer(additionalHeaders, ",");
            while (tokenizer.hasMoreTokens()) {
                String keyValue = tokenizer.nextToken();
                StringTokenizer innerTokenizer = new StringTokenizer(keyValue, ":");
                headers.put(innerTokenizer.nextToken(), innerTokenizer.nextToken());
            }
        }
        settings = new Settings(cmdLineResult.isExposeWhisper(), headers);
        jsonRpcHttpClient = new JsonRpcHttpClient(url);
        jsonRpcHttpClient.setRequestListener(new JsonRpcRequestListener());

        jsonRpcHttpClient.invoke("eth_protocolVersion", null, Object.class, headers);
        if (cmdLineResult.isExposeWhisper()) {
            jsonRpcHttpClient.invoke("shh_version", null, Object.class, headers);
        }
        System.out.println("Connection succeeded");
    } catch (Throwable e) {
        System.out.println("Connection failed: " + e.getMessage());
        System.exit(-1);
    }
    SpringApplication app = new SpringApplication(Application.class);
    app.setBanner(new Banner() {
        @Override
        public void printBanner(Environment environment, Class<?> aClass, PrintStream printStream) {
            //send the Spring Boot banner to /dev/null
        }
    });
    app.run(new String[] {});
}

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From source file:com.linkedin.restli.tools.data.FilterSchemaGenerator.java

public static void main(String[] args) {
    CommandLine cl = null;// w ww.  jav a  2  s. c  o  m
    try {
        final CommandLineParser parser = new GnuParser();
        cl = parser.parse(_options, args);
    } catch (ParseException e) {
        _log.error("Invalid arguments: " + e.getMessage());
        reportInvalidArguments();
    }

    final String[] directoryArgs = cl.getArgs();
    if (directoryArgs.length != 2) {
        reportInvalidArguments();
    }

    final File sourceDirectory = new File(directoryArgs[0]);
    if (!sourceDirectory.exists()) {
        _log.error(sourceDirectory.getPath() + " does not exist");
        System.exit(1);
    }
    if (!sourceDirectory.isDirectory()) {
        _log.error(sourceDirectory.getPath() + " is not a directory");
        System.exit(1);
    }
    final URI sourceDirectoryURI = sourceDirectory.toURI();

    final File outputDirectory = new File(directoryArgs[1]);
    if (outputDirectory.exists() && !sourceDirectory.isDirectory()) {
        _log.error(outputDirectory.getPath() + " is not a directory");
        System.exit(1);
    }

    final boolean isAvroMode = cl.hasOption('a');
    final String predicateExpression = cl.getOptionValue('e');
    final Predicate predicate = PredicateExpressionParser.parse(predicateExpression);

    final Collection<File> sourceFiles = FileUtil.listFiles(sourceDirectory, null);
    int exitCode = 0;
    for (File sourceFile : sourceFiles) {
        try {
            final ValidationOptions val = new ValidationOptions();
            val.setAvroUnionMode(isAvroMode);

            final SchemaParser schemaParser = new SchemaParser();
            schemaParser.setValidationOptions(val);

            schemaParser.parse(new FileInputStream(sourceFile));
            if (schemaParser.hasError()) {
                _log.error("Error parsing " + sourceFile.getPath() + ": " + schemaParser.errorMessageBuilder());
                exitCode = 1;
                continue;
            }

            final DataSchema originalSchema = schemaParser.topLevelDataSchemas().get(0);
            if (!(originalSchema instanceof NamedDataSchema)) {
                _log.error(sourceFile.getPath() + " does not contain valid NamedDataSchema");
                exitCode = 1;
                continue;
            }

            final SchemaParser filterParser = new SchemaParser();
            filterParser.setValidationOptions(val);

            final NamedDataSchema filteredSchema = Filters.removeByPredicate((NamedDataSchema) originalSchema,
                    predicate, filterParser);
            if (filterParser.hasError()) {
                _log.error("Error applying predicate: " + filterParser.errorMessageBuilder());
                exitCode = 1;
                continue;
            }

            final String relativePath = sourceDirectoryURI.relativize(sourceFile.toURI()).getPath();
            final String outputFilePath = outputDirectory.getPath() + File.separator + relativePath;
            final File outputFile = new File(outputFilePath);
            final File outputFileParent = outputFile.getParentFile();
            outputFileParent.mkdirs();
            if (!outputFileParent.exists()) {
                _log.error("Unable to write filtered schema to " + outputFileParent.getPath());
                exitCode = 1;
                continue;
            }

            FileOutputStream fout = new FileOutputStream(outputFile);
            String schemaJson = SchemaToJsonEncoder.schemaToJson(filteredSchema, JsonBuilder.Pretty.INDENTED);
            fout.write(schemaJson.getBytes(RestConstants.DEFAULT_CHARSET));
            fout.close();
        } catch (IOException e) {
            _log.error(e.getMessage());
            exitCode = 1;
        }
    }

    System.exit(exitCode);
}

---

From source file:FileDemo.java

public static void main(String args[]) {
    File f1 = new File("/java/COPYRIGHT");
    System.out.println("File Name: " + f1.getName());
    System.out.println("Path: " + f1.getPath());
    System.out.println("Abs Path: " + f1.getAbsolutePath());
    System.out.println("Parent: " + f1.getParent());
    System.out.println(f1.exists() ? "exists" : "does not exist");
    System.out.println(f1.canWrite() ? "is writeable" : "is not writeable");
    System.out.println(f1.canRead() ? "is readable" : "is not readable");
    System.out.println("is " + (f1.isDirectory() ? "" : "not" + " a directory"));
    System.out.println(f1.isFile() ? "is normal file" : "might be a named pipe");
    System.out.println(f1.isAbsolute() ? "is absolute" : "is not absolute");
    System.out.println("File last modified: " + f1.lastModified());
    System.out.println("File size: " + f1.length() + " Bytes");
}

---

From source file:de.fraunhofer.iosb.ilt.stc.Copier.java

/**
 * @param args the command line arguments
 * @throws de.fraunhofer.iosb.ilt.sta.ServiceFailureException
 * @throws java.net.URISyntaxException//from w ww.  j a  v a 2 s  . co m
 * @throws java.net.MalformedURLException
 */
public static void main(String[] args)
        throws ServiceFailureException, URISyntaxException, MalformedURLException, IOException {
    String configFileName = "configuration.json";
    if (args.length > 0) {
        configFileName = args[0];
    }
    File configFile = new File(configFileName);
    if (configFile.isFile() && configFile.exists()) {
        Copier copier = new Copier(configFile);
        copier.start();
    } else {
        LOGGER.info("No configuration found, generating sample.");
        JsonElement sampleConfig = new Copier().getConfigEditor(null, null).getConfig();
        Gson gson = new GsonBuilder().setPrettyPrinting().create();
        String configString = gson.toJson(sampleConfig);
        FileUtils.writeStringToFile(configFile, configString, "UTF-8");

        LOGGER.info("Sample configuration written to {}.", configFile);
    }
}

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From source file:lunarion.cluster.quickstart.ExampleProcess.java

public static void main(String[] args) throws Exception {
    String zkConnectString = "localhost:2181";
    String clusterName = "storage-integration-cluster";
    String instanceName = "localhost_8905";
    String file = null;/* w  ww.j  a v  a2 s .  co  m*/
    String stateModelValue = "MasterSlave";
    int delay = 0;
    boolean skipZeroArgs = true;// false is for dev testing
    if (!skipZeroArgs || args.length > 0) {
        CommandLine cmd = processCommandLineArgs(args);
        zkConnectString = cmd.getOptionValue(zkServer);
        clusterName = cmd.getOptionValue(cluster);

        String host = cmd.getOptionValue(hostAddress);
        String portString = cmd.getOptionValue(hostPort);
        int port = Integer.parseInt(portString);
        instanceName = host + "_" + port;

        file = cmd.getOptionValue(configFile);
        if (file != null) {
            File f = new File(file);
            if (!f.exists()) {
                System.err.println("static config file doesn't exist");
                System.exit(1);
            }
        }

        stateModelValue = cmd.getOptionValue(stateModel);
        if (cmd.hasOption(transDelay)) {
            try {
                delay = Integer.parseInt(cmd.getOptionValue(transDelay));
                if (delay < 0) {
                    throw new Exception("delay must be positive");
                }
            } catch (Exception e) {
                e.printStackTrace();
                delay = 0;
            }
        }
    }
    // Espresso_driver.py will consume this
    System.out.println("Starting Process with ZK:" + zkConnectString);

    ExampleProcess process = new ExampleProcess(zkConnectString, clusterName, instanceName, file,
            stateModelValue, delay);

    process.start();

    Runtime.getRuntime().addShutdownHook(new HelixManagerShutdownHook(process.getManager()));

    Thread.currentThread().join();
}

---

From source file:D20140128.ApacheXMLGraphicsTest.EPSColorsExample.java

/**
 * Command-line interface/*from  w  w  w. j  a  v  a2 s.  c o m*/
 *
 * @param args command-line arguments
 */
public static void main(String[] args) {
    try {
        File targetDir;
        if (args.length >= 1) {
            targetDir = new File(args[0]);
        } else {
            targetDir = new File(".");
        }
        if (!targetDir.exists()) {
            System.err.println("Target Directory does not exist: " + targetDir);
        }
        generateEPSusingJava2D(new File(targetDir, "eps-example-colors.eps"));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

---

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