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

Example 56 with Deflater

use of java.util.zip.Deflater in project okio by square.

the class DeflaterSinkTest method closeWithExceptionWhenWritingAndClosing.

/**
   * This test deflates a single segment of without compression because that's
   * the easiest way to force close() to emit a large amount of data to the
   * underlying sink.
   */
@Test
public void closeWithExceptionWhenWritingAndClosing() throws IOException {
    MockSink mockSink = new MockSink();
    mockSink.scheduleThrow(0, new IOException("first"));
    mockSink.scheduleThrow(1, new IOException("second"));
    Deflater deflater = new Deflater();
    deflater.setLevel(Deflater.NO_COMPRESSION);
    DeflaterSink deflaterSink = new DeflaterSink(mockSink, deflater);
    deflaterSink.write(new Buffer().writeUtf8(repeat('a', Segment.SIZE)), Segment.SIZE);
    try {
        deflaterSink.close();
        fail();
    } catch (IOException expected) {
        assertEquals("first", expected.getMessage());
    }
    mockSink.assertLogContains("close()");
}

Example 57 with Deflater

use of java.util.zip.Deflater in project bilibili-android-client by HotBitmapGG.

the class BiliDanmukuCompressionTools 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 58 with Deflater

use of java.util.zip.Deflater in project jodd by oblac.

the class ZipUtil method zlib.

/**
	 * Compresses a file into zlib archive.
	 */
public static File zlib(File file) throws IOException {
    if (file.isDirectory()) {
        throw new IOException("Can't zlib folder");
    }
    FileInputStream fis = new FileInputStream(file);
    Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION);
    String zlibFileName = file.getAbsolutePath() + ZLIB_EXT;
    DeflaterOutputStream dos = new DeflaterOutputStream(new FileOutputStream(zlibFileName), deflater);
    try {
        StreamUtil.copy(fis, dos);
    } finally {
        StreamUtil.close(dos);
        StreamUtil.close(fis);
    }
    return new File(zlibFileName);
}

Example 59 with Deflater

use of java.util.zip.Deflater in project robovm by robovm.

the class OldAndroidZipStressTest method testZipDeflateInflateStress.

/**
     * Native memory allocated by Deflater in system_server. The fix reduced
     * some internal ZLIB buffers in size, so this test is trying to execute a
     * lot of deflating to ensure that things are still working properly.
     * http://b/1185084
     */
public void testZipDeflateInflateStress() throws Exception {
    final int DATA_SIZE = 16384;
    // Seed makes test reproducible
    Random random = new Random(42);
    // Outer loop selects "mode" of test.
    for (int j = 1; j <= 2; j++) {
        byte[] input = new byte[DATA_SIZE];
        if (j == 1) {
            // Totally random content
            random.nextBytes(input);
        } else {
            // Random contents with longer repetitions
            int pos = 0;
            while (pos < input.length) {
                byte what = (byte) random.nextInt(256);
                int howMany = random.nextInt(32);
                if (pos + howMany >= input.length) {
                    howMany = input.length - pos;
                }
                Arrays.fill(input, pos, pos + howMany, what);
                pos += howMany;
            }
        }
        // Inner loop tries all 9 compression levels.
        for (int i = 1; i <= 9; i++) {
            System.out.println("ZipDeflateInflateStress test (" + j + "," + i + ")...");
            // Just to make sure...
            byte[] zipped = new byte[2 * DATA_SIZE];
            Deflater deflater = new Deflater(i);
            deflater.setInput(input);
            deflater.finish();
            deflater.deflate(zipped);
            deflater.end();
            byte[] output = new byte[DATA_SIZE];
            Inflater inflater = new Inflater();
            inflater.setInput(zipped);
            inflater.finished();
            inflater.inflate(output);
            inflater.end();
            assertEquals(input, output);
        }
    }
}

Example 60 with Deflater

use of java.util.zip.Deflater in project Dragonet-Legacy by DragonetMC.

the class BatchPacket method encode.

@Override
public void encode() {
    try {
        //We don't waste our memory
        setShouldSendImmidate(true);
        //Combine all packets
        ByteArrayOutputStream packetCombinerData = new ByteArrayOutputStream();
        PEBinaryWriter packetCombiner = new PEBinaryWriter(packetCombinerData);
        for (PEPacket pk : packets) {
            pk.encode();
            packetCombiner.writeInt(pk.getData().length);
            packetCombiner.write(pk.getData());
        }
        Deflater def = new Deflater(7);
        def.reset();
        def.setInput(packetCombinerData.toByteArray());
        def.finish();
        byte[] deflateBuffer = new byte[65535];
        int size = def.deflate(deflateBuffer);
        deflateBuffer = Arrays.copyOfRange(deflateBuffer, 0, size);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        PEBinaryWriter writer = new PEBinaryWriter(bos);
        writer.writeByte((byte) (this.pid() & 0xFF));
        writer.writeInt(deflateBuffer.length);
        writer.write(deflateBuffer);
        this.setData(bos.toByteArray());
    } catch (IOException e) {
    }
}