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

Example 21 with Deflater

use of java.util.zip.Deflater in project intellij-community by JetBrains.

the class ConnectionStreams method setGzipped.

// Actions ================================================================
// Actions ================================================================
public void setGzipped() throws IOException {
    loggedWriter.flush();
    loggedOutputStream.flush();
    deflaterOutputStream = new DeflaterOutputStream(connection.getOutputStream(), new Deflater(6));
    setOutputStream(deflaterOutputStream);
    setInputStream(new InflaterInputStream(connection.getInputStream()));
}

Example 22 with Deflater

use of java.util.zip.Deflater in project teaTime by ancfdy.

the class AppZLibMgr method compress.

/**
     * 压缩
     *
     * @param data
     *
     * @return byte[] 压缩后的数据
     */
public static byte[] compress(byte[] data) {
    byte[] output = new byte[0];
    Deflater compresser = new Deflater();
    compresser.reset();
    compresser.setInput(data);
    compresser.finish();
    ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length);
    try {
        byte[] buf = new byte[1024];
        while (!compresser.finished()) {
            int i = compresser.deflate(buf);
            bos.write(buf, 0, i);
        }
        output = bos.toByteArray();
    } catch (Exception e) {
        output = data;
        e.printStackTrace();
    } finally {
        try {
            bos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    compresser.end();
    return output;
}

Example 23 with Deflater

use of java.util.zip.Deflater in project eiger by wlloyd.

the class DeflateCompressor method compress.

public int compress(byte[] input, int inputOffset, int inputLength, ICompressor.WrappedArray output, int outputOffset) throws IOException {
    Deflater def = deflater.get();
    def.reset();
    def.setInput(input, inputOffset, inputLength);
    def.finish();
    if (def.needsInput())
        return 0;
    int offs = outputOffset;
    while (true) {
        offs += def.deflate(output.buffer, offs, output.buffer.length - offs);
        if (def.finished()) {
            return offs - outputOffset;
        } else {
            // We're not done, output was too small. Increase it and continue
            byte[] newBuffer = new byte[(output.buffer.length * 4) / 3 + 1];
            System.arraycopy(output.buffer, 0, newBuffer, 0, offs);
            output.buffer = newBuffer;
        }
    }
}

Example 24 with Deflater

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

the class DeflaterOutputStreamTest method testSyncFlushDeflater.

/**
     * Confirm that a DeflaterOutputStream constructed with Deflater
     * with flushParm == SYNC_FLUSH does not need to to be flushed.
     *
     * http://b/4005091
     */
public void testSyncFlushDeflater() throws Exception {
    Deflater def = new Deflater();
    Field f = def.getClass().getDeclaredField("flushParm");
    f.setAccessible(true);
    f.setInt(def, Deflater.SYNC_FLUSH);
    final int deflaterBufferSize = 512;
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    DeflaterOutputStream dos = new DeflaterOutputStream(baos, def, deflaterBufferSize);
    // make output buffer large enough that even if compressed it
    // won't all fit within the deflaterBufferSize.
    final int outputBufferSize = 128 * deflaterBufferSize;
    byte[] output = new byte[outputBufferSize];
    for (int i = 0; i < output.length; i++) {
        output[i] = (byte) i;
    }
    dos.write(output);
    byte[] compressed = baos.toByteArray();
    // this main reason for this assert is to make sure that the
    // compressed byte count is larger than the
    // deflaterBufferSize. However, when the original bug exists,
    // it will also fail because the compressed length will be
    // exactly the length of the deflaterBufferSize.
    assertTrue("compressed=" + compressed.length + " but deflaterBufferSize=" + deflaterBufferSize, compressed.length > deflaterBufferSize);
    // assert that we returned data matches the input exactly.
    ByteArrayInputStream bais = new ByteArrayInputStream(compressed);
    InflaterInputStream iis = new InflaterInputStream(bais);
    byte[] input = new byte[output.length];
    int total = 0;
    while (true) {
        int n = iis.read(input, total, input.length - total);
        if (n == -1) {
            break;
        }
        total += n;
        if (total == input.length) {
            try {
                iis.read();
                fail();
            } catch (EOFException expected) {
                break;
            }
        }
    }
    assertEquals(output.length, total);
    assertTrue(Arrays.equals(input, output));
    // ensure Deflater.finish has not been called at any point
    // during the test, since that would lead to the results being
    // flushed even without SYNC_FLUSH being used
    assertFalse(def.finished());
    // Quieten CloseGuard.
    def.end();
    iis.close();
}

Example 25 with Deflater

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

the class InflaterTest method deflate.

private static byte[] deflate(byte[] input, byte[] dictionary) {
    Deflater deflater = new Deflater();
    if (dictionary != null) {
        deflater.setDictionary(dictionary);
    }
    deflater.setInput(input);
    deflater.finish();
    ByteArrayOutputStream deflatedBytes = new ByteArrayOutputStream();
    byte[] buf = new byte[8];
    while (!deflater.finished()) {
        int byteCount = deflater.deflate(buf);
        deflatedBytes.write(buf, 0, byteCount);
    }
    deflater.end();
    return deflatedBytes.toByteArray();
}