Example usage for java.util.zip Deflater setLevel

Introduction

In this page you can find the example usage for java.util.zip Deflater setLevel.

Prototype

public void setLevel(int level) 

Source Link

Document

Sets the compression level to the specified value.

Usage

From source file:org.ojbc.util.helper.ZipUtils.java

public static byte[] zip(byte[] originalData) {
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);
    compressor.setInput(originalData);//www.  j  av  a 2s  .  c  o  m
    compressor.finish();

    ByteArrayOutputStream bos = new ByteArrayOutputStream(originalData.length);

    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }

    try {
        bos.close();
    } catch (IOException e) {
        log.error("Failed to zip data " + originalData, e);
    }
    byte[] compressedData = bos.toByteArray();

    log.debug("Orignal data:" + originalData.length + " bytes");
    log.debug("Compressed data:" + compressedData.length + " bytes");
    return compressedData;
}

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From source file:com.qatickets.common.ZIPHelper.java

public static byte[] compress(byte[] data) {

    // Create the compressor with highest level of compression
    final Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    // Give the compressor the data to compress
    compressor.setInput(data);/*w ww . ja va  2  s .c o m*/
    compressor.finish();

    // Create an expandable byte array to hold the compressed data.
    // You cannot use an array that's the same size as the orginal because
    // there is no guarantee that the compressed data will be smaller than
    // the uncompressed data.
    final ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length);

    // Compress the data
    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        final int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    try {
        bos.close();
    } catch (IOException e) {
    }

    // Get the compressed data
    final byte[] compressedData = bos.toByteArray();

    compressor.end();

    return compressedData;
}

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From source file:com.asual.lesscss.ResourcePackage.java

private static byte[] deflate(byte[] input) throws IOException {
    Deflater deflater = new Deflater();
    deflater.setLevel(Deflater.BEST_COMPRESSION);
    deflater.setInput(input);/*from ww w.  j a  va 2 s. c o m*/
    deflater.finish();
    ByteArrayOutputStream baos = new ByteArrayOutputStream(input.length);
    byte[] buf = new byte[1024];
    while (!deflater.finished()) {
        int count = deflater.deflate(buf);
        baos.write(buf, 0, count);
    }
    baos.close();
    return baos.toByteArray();
}

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From source file:radixcore.network.ByteBufIO.java

/**
 * Compresses the data in a byte array.//  w  w w  .  ja v a2s  .  co  m
 * 
 * @param input The byte array to be compressed.
 * @return The byte array in its compressed form.
 */
public static byte[] compress(byte[] input) {
    try {
        final Deflater deflater = new Deflater();
        deflater.setLevel(Deflater.BEST_COMPRESSION);
        deflater.setInput(input);

        final ByteArrayOutputStream byteOutput = new ByteArrayOutputStream(input.length);
        deflater.finish();

        final byte[] buffer = new byte[1024];

        while (!deflater.finished()) {
            final int count = deflater.deflate(buffer);
            byteOutput.write(buffer, 0, count);
        }

        deflater.end();
        byteOutput.close();
        return byteOutput.toByteArray();
    }

    catch (final IOException e) {
        RadixExcept.logFatalCatch(e, "Error compressing byte array.");
        return null;
    }
}

---

From source file:org.ow2.proactive.utils.ObjectByteConverter.java

/**
 * Convert the given Serializable Object into a byte array.
 * <p>/*w ww .  j  a  v a2  s  . co  m*/
 * The returned byteArray can be compressed by setting compress boolean argument value to <code>true</code>.
 * 
 * @param obj the Serializable object to be compressed
 * @param compress true if the returned byteArray must be also compressed, false if no compression is required.
 * @return a compressed (or not) byteArray representing the Serialization of the given object.
 * @throws IOException if an I/O exception occurs when writing the output byte array
 */
public static final byte[] objectToByteArray(Object obj, boolean compress) throws IOException {
    ByteArrayOutputStream baos = null;
    ObjectOutputStream oos = null;
    if (obj == null) {
        return null;
    }
    try {
        baos = new ByteArrayOutputStream();
        oos = new ObjectOutputStream(baos);
        oos.writeObject(obj);
        oos.flush();
        if (!compress) {
            // Return the UNCOMPRESSED data
            return baos.toByteArray();
        } else {
            // Compressor with highest level of compression
            Deflater compressor = new Deflater();
            compressor.setLevel(Deflater.BEST_COMPRESSION);
            // Give the compressor the data to compress
            compressor.setInput(baos.toByteArray());
            compressor.finish();

            ByteArrayOutputStream bos = null;
            try {
                // Create an expandable byte array to hold the compressed data.
                bos = new ByteArrayOutputStream();
                // Compress the data
                byte[] buf = new byte[512];
                while (!compressor.finished()) {
                    int count = compressor.deflate(buf);
                    bos.write(buf, 0, count);
                }
                // Return the COMPRESSED data
                return bos.toByteArray();
            } finally {
                if (bos != null) {
                    bos.close();
                }
            }
        }
    } finally {
        if (oos != null) {
            oos.close();
        }
        if (baos != null) {
            baos.close();
        }
    }
}

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From source file:edu.stanford.junction.addon.JSONObjWrapper.java

private static String compressString(String str) {
    byte[] input;
    try {//  ww w  .ja  va2  s.c  om
        input = str.getBytes("UTF-8");
    } catch (UnsupportedEncodingException e) {
        input = str.getBytes();
    }
    // Create the compressor with highest level of compression 
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);
    // Give the compressor the data to compress 
    compressor.setInput(input);
    compressor.finish();

    // Create an expandable byte array to hold the compressed data. 
    // You cannot use an array that's the same size as the orginal because 
    // there is no guarantee that the compressed data will be smaller than 
    // the uncompressed data. 
    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
    // Compress the data 
    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    try {
        bos.close();
    } catch (IOException e) {
    }
    // Get the compressed data 
    byte[] compressedData = bos.toByteArray();
    return Base64.encodeBytes(compressedData);
}

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From source file:de.unidue.inf.is.ezdl.dlcore.utils.StringUtils.java

/**
 * Compresses a string.//from w  ww  .j  av  a  2 s  .c o  m
 * 
 * @param s
 *            The string to compress
 * @return The compressed string
 */
public static String compress(String s) {
    ByteArrayOutputStream baos = null;
    try {
        byte[] input = s.getBytes("UTF-8");
        Deflater compresser = new Deflater();
        compresser.setLevel(Deflater.BEST_COMPRESSION);
        compresser.setInput(input);
        compresser.finish();
        baos = new ByteArrayOutputStream();
        while (!compresser.finished()) {
            byte[] output = new byte[1024];
            int compressedDataLength = compresser.deflate(output);
            baos.write(output, 0, compressedDataLength);
        }
        baos.flush();
        return Base64.encodeBase64String(baos.toByteArray());

    } catch (UnsupportedEncodingException e) {
        logger.error(e.getMessage(), e);
    } catch (IOException e) {
        logger.error(e.getMessage(), e);
    } finally {
        ClosingUtils.close(baos);
    }
    return "";
}

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From source file:com.android.server.wifi.WifiLogger.java

private static String compressToBase64(byte[] input) {
    String result;//from   w  w w .j  av a  2  s. c o  m
    //compress
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);
    compressor.setInput(input);
    compressor.finish();
    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
    final byte[] buf = new byte[1024];

    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }

    try {
        compressor.end();
        bos.close();
    } catch (IOException e) {
        Log.e(TAG, "ByteArrayOutputStream close error");
        result = android.util.Base64.encodeToString(input, Base64.DEFAULT);
        return result;
    }

    byte[] compressed = bos.toByteArray();
    if (DBG) {
        Log.d(TAG, " length is:" + (compressed == null ? "0" : compressed.length));
    }

    //encode
    result = android.util.Base64.encodeToString(compressed.length < input.length ? compressed : input,
            Base64.DEFAULT);

    if (DBG) {
        Log.d(TAG, "FwMemoryDump length is :" + result.length());
    }

    return result;
}

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From source file:com.bigdata.dastor.utils.FBUtilities.java

public static void compressToStream(byte[] input, ByteArrayOutputStream bos) throws IOException {
    // Create the compressor with highest level of compression
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    // Give the compressor the data to compress
    compressor.setInput(input);//from www .j a v  a2s  . c  o  m
    compressor.finish();

    // Write the compressed data to the stream
    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
}

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From source file:nl.nn.adapterframework.util.Misc.java

public static byte[] compress(byte[] input) throws IOException {

    // Create the compressor with highest level of compression
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

    // Give the compressor the data to compress
    compressor.setInput(input);//from ww  w .j a v  a2  s  .  co  m
    compressor.finish();

    // Create an expandable byte array to hold the compressed data.
    // You cannot use an array that's the same size as the orginal because
    // there is no guarantee that the compressed data will be smaller than
    // the uncompressed data.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

    // Compress the data
    byte[] buf = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buf);
        bos.write(buf, 0, count);
    }
    bos.close();

    // Get the compressed data
    return bos.toByteArray();
}

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