Example usage for java.util.zip Deflater Deflater

Introduction

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

Prototype

public Deflater() 

Source Link

Document

Creates a new compressor with the default compression level.

Usage

From source file:se.kth.infosys.lumberjack.protocol.LumberjackClient.java

public int sendCompressedFrame(List<Map<String, byte[]>> keyValuesList) throws IOException {
    output.writeByte(PROTOCOL_VERSION);//from  w  w  w . j  a  va2  s  .c om
    output.writeByte(FRAME_COMPRESSED);

    ByteArrayOutputStream uncompressedBytes = new ByteArrayOutputStream();
    DataOutputStream uncompressedOutput = new DataOutputStream(uncompressedBytes);
    for (Map<String, byte[]> keyValues : keyValuesList) {
        logger.trace("Adding data frame");
        sendDataFrame(uncompressedOutput, keyValues);
    }
    uncompressedOutput.close();
    Deflater compressor = new Deflater();
    byte[] uncompressedData = uncompressedBytes.toByteArray();
    logger.trace("Deflating data: {} bytes", uncompressedData.length);
    if (logger.isTraceEnabled()) {
        HexDump.dump(uncompressedData, 0, System.out, 0);
    }
    compressor.setInput(uncompressedData);
    compressor.finish();

    ByteArrayOutputStream compressedBytes = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    while (!compressor.finished()) {
        int count = compressor.deflate(buffer);
        compressedBytes.write(buffer, 0, count);
    }
    compressedBytes.close();
    byte[] compressedData = compressedBytes.toByteArray();
    logger.trace("Deflated data: {} bytes", compressor.getTotalOut());
    if (logger.isTraceEnabled()) {
        HexDump.dump(compressedData, 0, System.out, 0);
    }

    output.writeInt(compressor.getTotalOut());
    output.write(compressedData);
    output.flush();

    logger.trace("Sending compressed frame: {} frames", keyValuesList.size());
    return 6 + compressor.getTotalOut();
}

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From source file:net.fenyo.mail4hotspot.dns.Msg.java

private byte[] process(final AdvancedServices advancedServices, final Inet4Address address)
        throws GeneralException {
    // log.debug("processing message of type " + input_buffer[0]);
    // for (byte b : input_buffer) log.debug("received byte: [" + b + "]");

    if (input_buffer.length == 0)
        throw new GeneralException("invalid size");
    if (input_buffer[0] == 0) {
        // UTF-8 message type

        final ByteBuffer bb = ByteBuffer.allocate(input_buffer.length - 1);
        bb.put(input_buffer, 1, input_buffer.length - 1);
        bb.position(0);//from w  w w  . j  av a 2 s.  c  o m
        final String query = Charset.forName("UTF-8").decode(bb).toString();
        // log.debug("RECEIVED query: [" + query + "]");

        final String reply = advancedServices.processQueryFromClient(query, address);

        // this buffer may not be backed by an accessible byte array, so we do not use Charset.forName("UTF-8").encode(reply).array() to fill output_buffer
        final ByteBuffer ob = Charset.forName("UTF-8").encode(reply);
        ob.get(output_buffer = new byte[ob.limit()]);

        output_size = output_buffer.length;

    } else {
        // binary message type
        // log.debug("processing binary message");

        final ByteBuffer bb = ByteBuffer.allocate(input_buffer[0]);
        bb.put(input_buffer, 1, input_buffer[0]);
        bb.position(0);
        final String query = Charset.forName("UTF-8").decode(bb).toString();
        //      log.debug("RECEIVED query: [" + query + "]");

        final BinaryMessageReply reply = advancedServices.processBinaryQueryFromClient(query,
                Arrays.copyOfRange(input_buffer, input_buffer[0] + 1, input_buffer.length), address);

        // this buffer may not be backed by an accessible byte array, so we do not use Charset.forName("UTF-8").encode(reply).array() to fill string_part
        final ByteBuffer ob = Charset.forName("UTF-8").encode(reply.reply_string);
        final byte[] string_part = new byte[ob.limit()];
        ob.get(string_part);

        if (string_part.length > 255)
            throw new GeneralException("string_part too long");
        output_buffer = new byte[string_part.length + reply.reply_data.length + 1];
        output_buffer[0] = (byte) string_part.length;
        for (int i = 0; i < string_part.length; i++)
            output_buffer[i + 1] = string_part[i];
        for (int i = 0; i < reply.reply_data.length; i++)
            output_buffer[string_part.length + i + 1] = reply.reply_data[i];
        output_size = output_buffer.length;
    }

    synchronized (compressed) {
        // http://docs.oracle.com/javase/7/docs/api/java/util/zip/Deflater.html#deflate(byte[])
        // log.debug("processing binary message: length before compressing: " + output_buffer.length);
        final Deflater compresser = new Deflater();
        compresser.setInput(output_buffer);
        compresser.finish();
        final int nbytes = compresser.deflate(compressed);
        //         log.debug("RET: " + nbytes);
        //         log.debug("COMPRESSED: " + compressed.length);
        // log.debug("processing binary message: length after compressing: " + nbytes);
        if (compressed.length == nbytes) {
            log.error("compressed buffer too small...");
            throw new GeneralException("compressed buffer too small...");
        }
        output_buffer = Arrays.copyOf(compressed, nbytes);
        output_size = output_buffer.length;
    }

    synchronized (is_processed) {
        is_processed = true;
    }

    return new byte[] { 'E', 0 }; // 'E'rror 0 == OK
}

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From source file:com.newrelic.agent.android.harvest.HarvestConnection.java

private byte[] deflate(String str) {
    Deflater deflater = new Deflater();
    deflater.setInput(str.getBytes());/*from  ww  w .j a va  2  s . c o  m*/
    deflater.finish();
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    byte[] bArr = new byte[AccessibilityNodeInfoCompat.ACTION_SCROLL_BACKWARD];
    while (!deflater.finished()) {
        int deflate = deflater.deflate(bArr);
        if (deflate <= 0) {
            this.log.error("HTTP request contains an incomplete payload");
        }
        byteArrayOutputStream.write(bArr, 0, deflate);
    }
    deflater.end();
    return byteArrayOutputStream.toByteArray();
}

---

From source file:com.kactech.otj.Utils.java

public static byte[] zlibCompress(byte[] data) {
    Deflater deflater = new Deflater();
    deflater.setInput(data);/* w  ww  .  j  a va2s .  c o m*/

    ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);

    deflater.finish();
    byte[] buffer = new byte[1024];
    while (!deflater.finished()) {
        int count = deflater.deflate(buffer);
        outputStream.write(buffer, 0, count);
    }
    try {
        outputStream.close();
    } catch (IOException e) {
        // don't be silly
        throw new RuntimeException(e);
    }
    return outputStream.toByteArray();
}

---

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

private static String compressString(String str) {
    byte[] input;
    try {/*from   ww w  .ja v a2s.  com*/
        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:com.eryansky.common.utils.SysUtils.java

/**
  * /*from w w w.  j  a  v a  2 s . c  o m*/
  * 
  * @param in_str
  *            
  * @return ?
  */
 public static byte[] zip_Str(String in_str) {
     byte[] input = new byte[0];
     try {
         input = in_str.getBytes("UTF-8");
     } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
     }
     ArrayList<Byte> al = new ArrayList<Byte>();

     byte[] output;
     Deflater compresser = new Deflater();
     compresser.setInput(input);
     compresser.finish();
     for (; !compresser.finished();) {
         output = new byte[100];
         compresser.deflate(output);
         for (int i = 0; i < output.length; i++) {
             al.add(new Byte(output[i]));
         }
     }
     output = new byte[al.size()];
     for (int i = 0; i < al.size(); i++) {
         output[i] = (al.get(i)).byteValue();
     }
     return output;
 }

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From source file:acp.sdk.SecureUtil.java

/**
 * ./*w ww.  ja va 2 s . c o  m*/
 * 
 * @param inputByte
 *            ?byte[]
 * @return ??
 * @throws IOException
 */
public static byte[] deflater(final byte[] inputByte) throws IOException {
    int compressedDataLength = 0;
    Deflater compresser = new Deflater();
    compresser.setInput(inputByte);
    compresser.finish();
    ByteArrayOutputStream o = new ByteArrayOutputStream(inputByte.length);
    byte[] result = new byte[1024];
    try {
        while (!compresser.finished()) {
            compressedDataLength = compresser.deflate(result);
            o.write(result, 0, compressedDataLength);
        }
    } finally {
        o.close();
    }
    compresser.end();
    return o.toByteArray();
}

---

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);/* w  w w. j ava 2  s .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: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./* w  w  w . j a  v  a  2  s .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:de.triology.cas.logout.LogoutUriEnabledLogoutManagerImpl.java

/**
 * Create a logout message for front channel logout.
 *
 * @param logoutRequest the logout request.
 * @return a front SAML logout message.//from  w  w  w  .ja  v a 2  s .c  o m
 */
public String createFrontChannelLogoutMessage(final LogoutRequest logoutRequest) {
    final String logoutMessage = this.logoutMessageBuilder.create(logoutRequest);
    final Deflater deflater = new Deflater();
    deflater.setInput(logoutMessage.getBytes(ASCII));
    deflater.finish();
    final byte[] buffer = new byte[logoutMessage.length()];
    final int resultSize = deflater.deflate(buffer);
    final byte[] output = new byte[resultSize];
    System.arraycopy(buffer, 0, output, 0, resultSize);
    return Base64.encodeBase64String(output);
}

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