Example usage for java.util.zip GZIPInputStream read

Introduction

In this page you can find the example usage for java.util.zip GZIPInputStream read.

Prototype

public int read(byte[] buf, int off, int len) throws IOException 

Source Link

Document

Reads uncompressed data into an array of bytes.

Usage

From source file:Main.java

public static byte[] decompress(byte[] bytes) throws IOException {

    GZIPInputStream gzip = null;
    ByteArrayOutputStream baos = null;
    try {/*from www  . j av  a2  s .c  o  m*/
        baos = new ByteArrayOutputStream();

        gzip = new GZIPInputStream(new ByteArrayInputStream(bytes));

        int len = 0;
        byte data[] = new byte[BUFFER_SIZE];

        while ((len = gzip.read(data, 0, BUFFER_SIZE)) != -1) {
            baos.write(data, 0, len);
        }

        gzip.close();
        baos.flush();

        return baos.toByteArray();

    } finally {
        if (gzip != null) {
            gzip.close();
        }
        if (baos != null) {
            baos.close();
        }
    }
}

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From source file:og.android.tether.system.WebserviceTask.java

public static boolean downloadBluetoothModule(String downloadFileUrl, String destinationFilename) {
    if (android.os.Environment.getExternalStorageState()
            .equals(android.os.Environment.MEDIA_MOUNTED) == false) {
        return false;
    }/*ww w . j  ava  2s .  com*/
    File bluetoothDir = new File(BLUETOOTH_FILEPATH);
    if (bluetoothDir.exists() == false) {
        bluetoothDir.mkdirs();
    }
    if (downloadFile(downloadFileUrl, "", destinationFilename) == true) {
        try {
            FileOutputStream out = new FileOutputStream(new File(destinationFilename.replace(".gz", "")));
            FileInputStream fis = new FileInputStream(destinationFilename);
            GZIPInputStream gzin = new GZIPInputStream(new BufferedInputStream(fis));
            int count;
            byte buf[] = new byte[8192];
            while ((count = gzin.read(buf, 0, 8192)) != -1) {
                //System.out.write(x);
                out.write(buf, 0, count);
            }
            out.flush();
            out.close();
            gzin.close();
            File inputFile = new File(destinationFilename);
            inputFile.delete();
        } catch (IOException e) {
            return false;
        }
        return true;
    } else
        return false;
}

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From source file:Main.java

public static byte[] gzipDecodeByteArray(byte[] data) {
    GZIPInputStream gzipInputStream = null;
    try {// ww w.  j  av  a 2  s  . co  m
        gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(data));

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);
        byte[] buffer = new byte[1024];
        while (gzipInputStream.available() > 0) {
            int count = gzipInputStream.read(buffer, 0, 1024);
            if (count > 0) {
                //System.out.println("Read " + count + " bytes");
                outputStream.write(buffer, 0, count);
            }
        }

        outputStream.close();
        gzipInputStream.close();
        return outputStream.toByteArray();
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

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From source file:Main.java

public static void gunzip(File inFile, File outFile) {
    System.out.println("Expanding " + inFile.getAbsolutePath() + " to " + outFile.getAbsolutePath());

    FileOutputStream out = null;//from w  w  w  .  j  a v  a2s.c om
    GZIPInputStream zIn = null;
    FileInputStream fis = null;
    try {
        out = new FileOutputStream(outFile);
        fis = new FileInputStream(inFile);
        zIn = new GZIPInputStream(fis);
        byte[] buffer = new byte[8 * 1024];
        int count = 0;
        do {
            out.write(buffer, 0, count);
            count = zIn.read(buffer, 0, buffer.length);
        } while (count != -1);
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }
}

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From source file:net.sf.ehcache.distribution.PayloadUtil.java

/**
 * The fastest Ungzip implementation. See PageInfoTest in ehcache-constructs.
 * A high performance implementation, although not as fast as gunzip3.
 * gunzips 100000 of ungzipped content in 9ms on the reference machine.
 * It does not use a fixed size buffer and is therefore suitable for arbitrary
 * length arrays./*w w w .j a v a2 s.  c  o  m*/
 *
 * @param gzipped
 * @return a plain, uncompressed byte[]
 */
public static byte[] ungzip(final byte[] gzipped) {
    byte[] ungzipped = new byte[0];
    try {
        final GZIPInputStream inputStream = new GZIPInputStream(new ByteArrayInputStream(gzipped));
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(gzipped.length);
        final byte[] buffer = new byte[PayloadUtil.MTU];
        int bytesRead = 0;
        while (bytesRead != -1) {
            bytesRead = inputStream.read(buffer, 0, PayloadUtil.MTU);
            if (bytesRead != -1) {
                byteArrayOutputStream.write(buffer, 0, bytesRead);
            }
        }
        ungzipped = byteArrayOutputStream.toByteArray();
        inputStream.close();
        byteArrayOutputStream.close();
    } catch (IOException e) {
        LOG.fatal("Could not ungzip. Heartbeat will not be working. " + e.getMessage());
    }
    return ungzipped;
}

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From source file:net.grinder.util.LogCompressUtil.java

/**
 * Uncompress the given array into the given file.
 * /*from   ww  w .  j av  a2 s .  c  o m*/
 * @param zipEntry
 *            byte array of compressed file
 * @param toFile
 *            file to be written
 */
public static void unCompressGzip(byte[] zipEntry, File toFile) {
    FileOutputStream fos = null;
    GZIPInputStream zipInputStream = null;
    ByteArrayInputStream bio = null;
    try {
        bio = new ByteArrayInputStream(zipEntry);
        zipInputStream = new GZIPInputStream(bio);
        fos = new FileOutputStream(toFile);
        byte[] buffer = new byte[COMPRESS_BUFFER_SIZE];
        int count = 0;
        while ((count = zipInputStream.read(buffer, 0, COMPRESS_BUFFER_SIZE)) != -1) {
            fos.write(buffer, 0, count);
        }
        fos.flush();
    } catch (IOException e) {
        LOGGER.error("Error occurs while uncompress {}", toFile.getAbsolutePath());
        LOGGER.error("Details", e);
        return;
    } finally {
        IOUtils.closeQuietly(fos);
        IOUtils.closeQuietly(bio);
        IOUtils.closeQuietly(zipInputStream);
    }
}

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From source file:org.cloudata.core.common.io.CWritableUtils.java

public static byte[] readCompressedByteArray(DataInput in) throws IOException {
    int length = in.readInt();
    if (length == -1)
        return null;
    byte[] buffer = new byte[length];
    in.readFully(buffer); // could/should use readFully(buffer,0,length)?
    GZIPInputStream gzi = new GZIPInputStream(new ByteArrayInputStream(buffer, 0, buffer.length));
    byte[] outbuf = new byte[length];
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    int len;/*from   w  w w  . j  a  v a 2  s . com*/
    while ((len = gzi.read(outbuf, 0, outbuf.length)) != -1) {
        bos.write(outbuf, 0, len);
    }
    byte[] decompressed = bos.toByteArray();
    bos.close();
    gzi.close();
    return decompressed;
}

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From source file:org.openbel.framework.core.df.cache.CacheUtil.java

/**
 * Copies the <tt>resource</tt> to <tt>copy</tt>.  Decompression is
 * performed if the resource file is identified as a GZIP-encoded file.
 *
 * @param resource {@link File}, the resource to copy
 * @param resourceLocation {@link String}, the resource location url
 * @param copy {@link File}, the file to copy to
 * @return {@link File}, the copied file
 * @throws ResourceDownloadError Thrown if an IO error copying the resource
 *//*from ww  w .j a va2 s  .  c o  m*/
private static File copyWithDecompression(final File resource, final String resourceLocation, final File copy)
        throws ResourceDownloadError {
    GZIPInputStream gzipis = null;
    FileOutputStream fout = null;
    try {
        MagicNumberFileFilter mnff = new MagicNumberFileFilter(GZIP_MAGIC_NUMBER);

        if (mnff.accept(resource)) {
            gzipis = new GZIPInputStream(new FileInputStream(resource));
            byte[] buffer = new byte[8192];

            fout = new FileOutputStream(copy);

            int length;
            while ((length = gzipis.read(buffer, 0, 8192)) != -1) {
                fout.write(buffer, 0, length);
            }
        } else {
            copyFile(resource, copy);
        }
    } catch (IOException e) {
        String msg = e.getMessage();
        ResourceDownloadError r = new ResourceDownloadError(resourceLocation, msg);
        r.initCause(e);
        throw r;
    } finally {
        // clean up all I/O resources
        closeQuietly(fout);
        closeQuietly(gzipis);
    }

    return copy;
}

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From source file:org.mitre.opensextant.util.FileUtility.java

/**
 *
 * @param fname//  ww  w .  jav  a 2s  .c  om
 * @return
 * @throws IOException
 */
public static String readGzipFile(String fname) throws IOException {
    if (fname == null) {
        return null;
    }

    FileInputStream instream = new FileInputStream(fname);
    GZIPInputStream gzin = new GZIPInputStream(new BufferedInputStream(instream), default_buffer);

    byte[] inputBytes = new byte[default_buffer];
    StringBuilder buf = new StringBuilder();

    int readcount = 0;
    while ((readcount = gzin.read(inputBytes, 0, default_buffer)) != -1) {
        buf.append(new String(inputBytes, 0, readcount, default_encoding));
    }
    instream.close();
    gzin.close();

    return buf.toString();

}

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From source file:it.geosolutions.tools.compress.file.Extractor.java

/**
 * @author Carlo Cancellieri - carlo.cancellieri@geo-solutions.it
 * /*from   ww  w  . jav  a  2  s.  c o m*/
 *         Extract a GZip file to a tar
 * @param in_file
 *            the input bz2 file to extract
 * @param out_file
 *            the output tar file to extract to
 */
public static void extractGzip(File in_file, File out_file) throws CompressorException {
    FileOutputStream out = null;
    GZIPInputStream zIn = null;
    FileInputStream fis = null;
    BufferedInputStream bis = null;
    try {
        out = new FileOutputStream(out_file);
        fis = new FileInputStream(in_file);
        bis = new BufferedInputStream(fis, Conf.getBufferSize());
        zIn = new GZIPInputStream(bis);
        byte[] buffer = new byte[Conf.getBufferSize()];
        int count = 0;
        while ((count = zIn.read(buffer, 0, Conf.getBufferSize())) != -1) {
            out.write(buffer, 0, count);
        }
    } catch (IOException ioe) {
        String msg = "Problem uncompressing Gzip " + ioe.getMessage() + " ";
        throw new CompressorException(msg + in_file.getAbsolutePath());
    } finally {
        try {
            if (bis != null)
                bis.close();
        } catch (IOException ioe) {
            throw new CompressorException("Error closing stream: " + in_file.getAbsolutePath());
        }
        try {
            if (fis != null)
                fis.close();
        } catch (IOException ioe) {
            throw new CompressorException("Error closing stream: " + in_file.getAbsolutePath());
        }
        try {
            if (out != null)
                out.close();
        } catch (IOException ioe) {
            throw new CompressorException("Error closing stream: " + in_file.getAbsolutePath());
        }
        try {
            if (zIn != null)
                zIn.close();
        } catch (IOException ioe) {
            throw new CompressorException("Error closing stream: " + in_file.getAbsolutePath());
        }
    }
}

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