Example usage for java.util.zip Deflater finished

Introduction

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

Prototype

public boolean finished() 

Source Link

Document

Returns true if the end of the compressed data output stream has been reached.

Usage

From source file:com.igormaznitsa.jcp.expression.functions.FunctionBINFILE.java

@Nonnull
private static byte[] deflate(@Nonnull final byte[] data) throws IOException {
    final Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
    deflater.setInput(data);/*  w w w.jav  a 2 s.co  m*/

    final ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);

    deflater.finish();
    final byte[] buffer = new byte[1024];
    while (!deflater.finished()) {
        final int count = deflater.deflate(buffer);
        outputStream.write(buffer, 0, count);
    }
    outputStream.close();
    final byte[] output = outputStream.toByteArray();

    deflater.end();

    return output;
}

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From source file:radixcore.network.ByteBufIO.java

/**
 * Compresses the data in a byte array.//from  w  w  w .j  av  a 2  s.com
 * 
 * @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;
    }
}

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From source file:gov.niem.ws.util.SecurityUtil.java

/**
 * Encode data with DEFLATE and then Base64 without chunking, so it can
 * safely be placed in an HTTP header.//from ww w  . j a va 2s.  c  o m
 * 
 * @param data
 * @return the compressed, b64 encoded data
 * @throws DataFormatException
 */
public static String encodeHeader(byte[] data) throws DataFormatException {
    // TODO: length limit on encoded?      
    ByteArrayOutputStream out = new ByteArrayOutputStream(data.length);
    Deflater deflater = new Deflater();
    deflater.setInput(data);
    deflater.finish();
    byte[] buffer = new byte[1024];
    while (!deflater.finished()) {
        int count = deflater.deflate(buffer);
        if (count == 0)
            break;
        out.write(buffer, 0, count);
    }

    try {
        deflater.end();
        out.close();
    } catch (IOException e) {
    }

    return new String(Base64.encodeBase64(out.toByteArray(), false));
}

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From source file:Main.java

public static byte[] compress(byte[] input) {
    if (input == null || input.length == 0)
        return input;
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_COMPRESSION);

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

    // Create an expandable byte array to hold the compressed data.
    // It is not necessary 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);
    }

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

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From source file:Main.java

public static String compressAndB64EncodeUTF8Bytes(byte[] bytes) throws Exception {

    byte[] input = bytes;

    // 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 ava 2s .co  m*/
    compressor.finish();

    // Create an expandable byte array to hold the compressed data.
    // It is not necessary that the compressed data will be smaller than
    // the uncompressed data.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

    // Compress the data
    byte[] buf = new byte[32];
    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 new String(Base64.encode(compressedData), "UTF-8");
}

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

/**
 * Compresses a string.//  w  w w .  j a  va2 s .  c  om
 * 
 * @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:Main.java

/**
 * Compress the byte array passed/*from   ww w.j ava  2  s . c  om*/
 * <p>
 * @param input byte array
 * @param bufferLength buffer length
 * @return compressed byte array
 * @throws IOException thrown if we can't close the output stream
 */
public static byte[] compressByteArray(byte[] input, int bufferLength) throws IOException {
    // 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.
    // It is not necessary that the compressed data will be smaller than
    // the uncompressed data.
    ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

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

    // JCS-136 ( Details here : http://www.devguli.com/blog/eng/java-deflater-and-outofmemoryerror/ )
    compressor.end();
    bos.close();

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

}

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From source file:Main.java

public static byte[] compressZLIB(byte[] input) throws IOException {
    // Create the compressor with highest level of compression
    Deflater compressor = new Deflater();
    compressor.setLevel(Deflater.BEST_SPEED);
    // Give the compressor the data to compress
    compressor.setInput(input);/*w w  w  .j  a v  a  2s  .  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.
    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
    byte[] compressedData = bos.toByteArray();
    return compressedData;
}

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

private static String compressToBase64(byte[] input) {
    String result;//from  w ww.java2 s. co 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.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);//from w  ww  . ja va  2  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.
    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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