Examples with Deflater java.util.zip.Deflater used on opensource projects

Example 61 with Deflater

use of java.util.zip.Deflater in project CodeChickenLib by Chicken-Bones.

the class PacketCustom method do_compress.

/**
     * Compresses the payload ByteBuf after the type byte
     */
private void do_compress() {
    Deflater deflater = new Deflater();
    try {
        readerIndex(1);
        int len = readableBytes();
        deflater.setInput(array(), readerIndex(), len);
        deflater.finish();
        byte[] out = new byte[len];
        int clen = deflater.deflate(out);
        if (//not worth compressing, gets larger
        clen >= len - 5 || !deflater.finished())
            return;
        clear();
        writeByte(type | 0x80);
        writeVarInt(len);
        writeByteArray(out);
    } catch (Exception e) {
        throw new EncoderException(e);
    } finally {
        readerIndex(0);
        deflater.end();
    }
}

Example 62 with Deflater

use of java.util.zip.Deflater in project Anki-Android by Ramblurr.

the class Utils method compress.

/**
     * Compress data.
     * @param bytesToCompress is the byte array to compress.
     * @return a compressed byte array.
     * @throws java.io.IOException
     */
public static byte[] compress(byte[] bytesToCompress, int comp) throws IOException {
    // Compressor with highest level of compression.
    Deflater compressor = new Deflater(comp, true);
    // Give the compressor the data to compress.
    compressor.setInput(bytesToCompress);
    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(bytesToCompress.length);
    // Compress the data
    byte[] buf = new byte[65536];
    while (!compressor.finished()) {
        bos.write(buf, 0, compressor.deflate(buf));
    }
    bos.close();
    // Get the compressed data
    return bos.toByteArray();
}

Example 63 with Deflater

use of java.util.zip.Deflater in project hadoop by apache.

the class CompressedWritable method write.

@Override
public final void write(DataOutput out) throws IOException {
    if (compressed == null) {
        ByteArrayOutputStream deflated = new ByteArrayOutputStream();
        Deflater deflater = new Deflater(Deflater.BEST_SPEED);
        DataOutputStream dout = new DataOutputStream(new DeflaterOutputStream(deflated, deflater));
        writeCompressed(dout);
        dout.close();
        deflater.end();
        compressed = deflated.toByteArray();
    }
    out.writeInt(compressed.length);
    out.write(compressed);
}

Example 64 with Deflater

use of java.util.zip.Deflater in project ABPlayer by winkstu.

the class CompressionTools method compress.

public static byte[] compress(byte[] value, int offset, int length, int compressionLevel) {
    ByteArrayOutputStream bos = new ByteArrayOutputStream(length);
    Deflater compressor = new Deflater();
    try {
        //将当前压缩级别设置为指定值。
        compressor.setLevel(compressionLevel);
        compressor.setInput(value, offset, length);
        //调用时，指示压缩应当以输入缓冲区的当前内容结尾。
        compressor.finish();
        // Compress the data
        final byte[] buf = new byte[1024];
        while (!compressor.finished()) {
            //如果已到达压缩数据输出流的结尾，则返回 true。
            int count = compressor.deflate(buf);
            // 使用压缩数据填充指定缓冲区。
            bos.write(buf, 0, count);
        }
    } finally {
        //关闭解压缩器并放弃所有未处理的输入。
        compressor.end();
    }
    return bos.toByteArray();
}

Example 65 with Deflater

use of java.util.zip.Deflater in project OpenAM by OpenRock.

the class SAML2Utils method encodeForRedirect.

/**
     * Returns the encoded request message.
     * The SAML Request message must be
     * encoded before being transmitted.
     * The Request message is encoded as follows:
     * 1. URL Encoded using the DEFLATE compression method.
     * 2. Then the message is base-64 encoded according to
     * the rules specified in RFC2045.
     *
     * @param str String to be encoded.
     * @return String the encoded String value or null on error.
     */
public static String encodeForRedirect(final String str) {
    String classMethod = "SAML2Utils.encodeForRedirect: ";
    byte[] input;
    try {
        input = str.getBytes("UTF-8");
    } catch (UnsupportedEncodingException uee) {
        debug.error(classMethod + "cannot get byte array: ", uee);
        return null;
    }
    Deflater deflater = new Deflater(Deflater.DEFAULT_COMPRESSION, true);
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    DeflaterOutputStream deflaterOutputStream = new DeflaterOutputStream(out, deflater);
    try {
        deflaterOutputStream.write(input);
    } catch (IOException e) {
        debug.error(classMethod + "There was a problem compressing the input", e);
        return null;
    } finally {
        IOUtils.closeIfNotNull(deflaterOutputStream);
    }
    String encoded = URLEncDec.encode(Base64.encode(out.toByteArray()));
    if (debug.messageEnabled()) {
        debug.message(classMethod + "out string length : " + encoded.length());
        debug.message(classMethod + "out string is ===>" + encoded + "<===");
    }
    return encoded;
}