Example usage for com.google.common.io ByteSource openBufferedStream

Introduction

In this page you can find the example usage for com.google.common.io ByteSource openBufferedStream.

Prototype

public InputStream openBufferedStream() throws IOException 

Source Link

Document

Opens a new buffered InputStream for reading from this source.

Usage

From source file:com.google.devtools.build.lib.vfs.FileSystemUtils.java

/**
 * Reads at most {@code limit} bytes from {@code inputFile} and returns it as a byte array.
 *
 * @throws IOException if there was an error.
 */// w w w .  java2  s  .c  o m
public static byte[] readContentWithLimit(Path inputFile, int limit) throws IOException {
    Preconditions.checkArgument(limit >= 0, "limit needs to be >=0, but it is %s", limit);
    ByteSource byteSource = asByteSource(inputFile);
    byte[] buffer = new byte[limit];
    try (InputStream inputStream = byteSource.openBufferedStream()) {
        int read = ByteStreams.read(inputStream, buffer, 0, limit);
        return read == limit ? buffer : Arrays.copyOf(buffer, read);
    }
}

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From source file:org.asoem.greyfish.utils.persistence.JavaPersister.java

private <T> T deserialize(final ByteSource byteSource, final Class<T> clazz)
        throws IOException, ClassNotFoundException {
    final InputStream input = byteSource.openBufferedStream();
    boolean threw = true;
    try {/* w  ww.j  a  va2s . com*/
        final T object = deserialize(input, clazz);
        threw = false;
        return object;
    } finally {
        Closeables.close(input, threw);
    }
}

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From source file:com.zxy.commons.hystrix.web.HystrixInitializer.java

/**
 * webspringproperties??/*w ww .  ja v  a  2s  .  c om*/
 * 
 * @return Properties
*/
private Properties load() {
    Properties properties = new Properties();
    InputStream inputStream = null;
    try {
        final URL url = Resources.getResource("hystrix.properties");
        final ByteSource byteSource = Resources.asByteSource(url);

        inputStream = byteSource.openBufferedStream();
        properties.load(inputStream);
        // properties.list(System.out);
    } catch (Exception e) {
        // do nothing
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException ioException) {
                // do nothing
            }
        }
    }
    return properties;
}

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From source file:de.l3s.concatgz.io.FileBackedBytesWritable.java

@Override
public void write(DataOutput dataOutput) throws IOException {
    if (stream == null)
        return;//w  ww  .jav a  2s .  c o  m
    ByteSource bytes = stream.asByteSource();
    long size = bytes.size();
    dataOutput.writeLong(size);
    byte[] buffer = new byte[BUFFER_SIZE];
    InputStream stream = bytes.openBufferedStream();
    int read = stream.read(buffer);
    while (read != -1) {
        if (read > 0)
            dataOutput.write(buffer, 0, read);
        read = stream.read(buffer);
    }
    stream.close();
}

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From source file:com.zenika.doclipser.api.DockerConfig.java

private Properties readPropertyFile(URL url) {
    final ByteSource byteSource = Resources.asByteSource(url);
    final Properties properties = new Properties();
    InputStream inputStream = null;
    try {//w ww  .ja  v  a 2s. co m
        inputStream = byteSource.openBufferedStream();
        properties.load(inputStream);
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (final IOException ioException) {
                ioException.printStackTrace();
            }
        }
    }
    return properties;
}

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From source file:com.fasterxml.jackson.tools.Jackson.java

private void run() {
    ByteSource inputSource = Files.asByteSource(inputFile);
    ByteSink outputSink = Files.asByteSink(outputFile);
    InputStream input;/*from   ww  w . j a  v a  2 s .  c  o m*/
    OutputStream output;
    try {
        input = inputSource.openBufferedStream();
        output = outputSink.openBufferedStream();
        convert(input, output);
    } catch (IOException e) {
        System.err.format("Exception in conversion %s%n", e.getMessage());
        System.exit(1);
    }
}

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From source file:com.zxy.commons.lang.conf.AbstractConfigProperties.java

/**
 * ?Properties/*from w w w.j  a  va  2s  .  co m*/
 * 
 * @return Properties
 * @throws IOException
 */
@SuppressWarnings("PMD.EmptyCatchBlock")
private Properties load() throws IOException {
    //      final URL url = Resources.getResource(resource);
    final URL url = getPath();
    final ByteSource byteSource = Resources.asByteSource(url);
    final Properties properties = new Properties();
    InputStream inputStream = null;
    try {
        inputStream = byteSource.openBufferedStream();
        properties.load(inputStream);
        //         properties.list(System.out);
    } finally {
        if (inputStream != null) {
            try {
                inputStream.close();
            } catch (IOException ioException) {
                // do nothing
            }
        }
    }
    return properties;
}

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From source file:org.codice.ddf.spatial.geocoding.extract.GeoNamesFileExtractor.java

/**
 * Download a GeoNames .zip file from a remote location
 *
 * @param resource         - the name of the zip file to download ( ex. AD )
 * @param response         - the response from the get request
 * @param inputStream      - the InputStream from the web connection
 * @param progressCallback -  the callback to receive updates about the progress, may be
 *                         null if you don't want any updates
 * @throws GeoNamesRemoteDownloadException when the connection could not be established or the
 *                                         file could not be downloaded.
 *//*from  w w w.jav a2  s.co m*/
private InputStream getInputStreamFromUrl(String resource, Response response, InputStream inputStream,
        ProgressCallback progressCallback) throws GeoNamesRemoteDownloadException {
    int responseCode = 0;

    try (FileBackedOutputStream fileOutputStream = new FileBackedOutputStream(BUFFER_SIZE);) {

        responseCode = response.getStatus();

        int totalFileSize = response.getLength();

        if (inputStream == null) {
            throw new GeoNamesRemoteDownloadException(
                    "Unable to get input stream from " + url + ".  Server responded with : " + responseCode);
        }

        double totalBytesRead = 0.0;
        int bytesRead = -1;
        byte[] buffer = new byte[BUFFER_SIZE];

        while ((bytesRead = inputStream.read(buffer)) != -1) {
            fileOutputStream.write(buffer, 0, bytesRead);
            totalBytesRead += bytesRead;
            if (progressCallback != null) {
                progressCallback.updateProgress((int) ((totalBytesRead / totalFileSize) * 50));
            }
        }

        if (progressCallback != null) {
            progressCallback.updateProgress(50);
        }

        ByteSource byteSource = fileOutputStream.asByteSource();
        fileOutputStream.flush();
        inputStream.close();
        closeConnection();

        return byteSource.openBufferedStream();

    } catch (IOException e) {
        throw new GeoNamesRemoteDownloadException("Unable to download " + resource + " from " + url
                + ".  Server responded with : " + responseCode, e);
    }
}

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From source file:org.codice.ddf.spatial.geocoding.extract.GeoNamesFileExtractor.java

/**
 * Unzips a file and returns the output as a new InputStream
 *
 * @param resource    - the name of the resource file to be unzipped
 * @param inputStream - the InputStream for the file to be unzipped
 * @return - the unzipped file as an InputStream
 * @throws GeoEntryExtractionException when the given file fails to be unzipped.
 *///from w w w . j  a v  a2s.com
private InputStream unZipInputStream(String resource, InputStream inputStream)
        throws GeoEntryExtractionException {
    try (FileBackedOutputStream bufferedOutputStream = new FileBackedOutputStream(BUFFER_SIZE);
            ZipInputStream zipInputStream = new ZipInputStream(inputStream);) {

        ZipEntry zipEntry;
        while ((zipEntry = zipInputStream.getNextEntry()) != null) {

            // GeoNames <filename>.zip files will contain <filename>.txt and readme.txt
            if (!zipEntry.getName().equals("readme.txt")) {

                byte data[] = new byte[BUFFER_SIZE];
                int bytesRead;
                while ((bytesRead = zipInputStream.read(data, 0, BUFFER_SIZE)) != -1) {
                    bufferedOutputStream.write(data, 0, bytesRead);
                }

                ByteSource zipByteSource = bufferedOutputStream.asByteSource();
                bufferedOutputStream.flush();
                fileSize = zipByteSource.size();
                return zipByteSource.openBufferedStream();
            }
        }

    } catch (IOException e) {
        throw new GeoEntryExtractionException("Unable to unzip " + resource, e);
    }

    throw new GeoEntryExtractionException("Unable to unzip " + resource);
}

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From source file:de.nx42.maps4cim.header.HeaderEditor.java

public void writeChanges(File dest) throws IOException {

    /*/*  ww w.  j a  v  a 2  s  .  com*/
     * - Find header end of old file
     * - write new header to byte array
     * - create new writer, append new header & main part of old file
     */

    // write to temp, rename if successful (useful if src == dest and errors occur...)
    File tmp = new File(dest.getParentFile(), dest.getName() + ".tmp");

    // create streams
    InputStream is = null;
    FileOutputStream fos = null;

    try {
        // open the source file and find the end of the header
        ByteSource source = Files.asByteSource(mapFile);
        int headerEnd = HeaderParser.findEndOfHeader(source);

        // open the destination file
        fos = new FileOutputStream(tmp);

        // write the header
        fos.write(header.generateHeader());

        // copy the contents (without header) from the source file to the destination
        is = source.openBufferedStream();
        long skipped = is.skip(headerEnd);
        if (skipped != headerEnd) {
            throw new IOException("Could not read from existing map file!");
        }
        ByteStreams.copy(is, fos);

        // move tmp file
        fos.close();
        if (dest.exists()) {
            dest.delete();
        }
        Files.move(tmp, dest);
    } finally {
        // close streams
        if (is != null) {
            is.close();
        }
        if (fos != null) {
            fos.close();
        }
    }
}

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