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

Example 51 with Deflater

use of java.util.zip.Deflater in project j2objc by google.

the class OldAndroidDeflateTest method bigTest.

/*
     * "step" determines how compressible the data is.
     *
     * Note we must set "nowrap" to false, or the Adler-32 doesn't get
     * computed.
     */
private void bigTest(int step, int expectedAdler) throws UnsupportedEncodingException, DataFormatException {
    byte[] input = new byte[128 * 1024];
    byte[] comp = new byte[128 * 1024 + 512];
    byte[] output = new byte[128 * 1024 + 512];
    Inflater inflater = new Inflater(false);
    Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION, false);
    createSample(input, step);
    compress(deflater, input, comp);
    expand(inflater, comp, (int) deflater.getBytesWritten(), output);
    assertEquals(inflater.getBytesWritten(), input.length);
    assertEquals(deflater.getAdler(), inflater.getAdler());
    assertEquals(deflater.getAdler(), expectedAdler);
}

Example 52 with Deflater

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

the class SkinnyHistogram method encodeIntoCompressedByteBuffer.

public synchronized int encodeIntoCompressedByteBuffer(final ByteBuffer targetBuffer) {
    ByteBuffer intermediateUncompressedByteBuffer = ByteBuffer.allocate(this.getNeededByteBufferCapacity());
    int uncompressedLength = this.encodeIntoByteBuffer(intermediateUncompressedByteBuffer);
    targetBuffer.putInt(SkinnyHistogram.encodingCompressedCookieBase);
    targetBuffer.putInt(0);
    targetBuffer.putInt(uncompressedLength);
    Deflater compressor = new Deflater(defaultCompressionLevel);
    compressor.setInput(intermediateUncompressedByteBuffer.array(), 0, uncompressedLength);
    compressor.finish();
    byte[] targetArray = targetBuffer.array();
    int compressedDataLength = compressor.deflate(targetArray, 12, targetArray.length - 12);
    compressor.reset();
    targetBuffer.putInt(4, compressedDataLength);
    return compressedDataLength + 12;
}

Example 53 with Deflater

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

the class HistogramTest method testAbstractSerialization.

void testAbstractSerialization(AbstractHistogram histogram) throws Exception {
    histogram.recordValue(testValueLevel);
    histogram.recordValue(testValueLevel * 10);
    histogram.recordValueWithExpectedInterval(histogram.getHighestTrackableValue() - 1, 255);
    if (histogram.supportsAutoResize()) {
        histogram.setAutoResize(true);
        assertTrue(histogram.isAutoResize());
    }
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutput out = null;
    ByteArrayInputStream bis = null;
    ObjectInput in = null;
    AbstractHistogram newHistogram = null;
    try {
        out = new ObjectOutputStream(bos);
        out.writeObject(histogram);
        Deflater compresser = new Deflater();
        compresser.setInput(bos.toByteArray());
        compresser.finish();
        byte[] compressedOutput = new byte[1024 * 1024];
        int compressedDataLength = compresser.deflate(compressedOutput);
        System.out.println("Serialized form of " + histogram.getClass() + " with trackableValueRangeSize = " + histogram.getHighestTrackableValue() + "\n and a numberOfSignificantValueDigits = " + histogram.getNumberOfSignificantValueDigits() + " is " + bos.toByteArray().length + " bytes long. Compressed form is " + compressedDataLength + " bytes long.");
        System.out.println("   (estimated footprint was " + histogram.getEstimatedFootprintInBytes() + " bytes)");
        bis = new ByteArrayInputStream(bos.toByteArray());
        in = new ObjectInputStream(bis);
        newHistogram = (AbstractHistogram) in.readObject();
    } finally {
        if (out != null)
            out.close();
        bos.close();
        if (in != null)
            in.close();
        if (bis != null)
            bis.close();
    }
    Assert.assertNotNull(newHistogram);
    assertEqual(histogram, newHistogram);
    assertTrue(histogram.equals(newHistogram));
    if (histogram.supportsAutoResize()) {
        assertTrue(histogram.isAutoResize());
    }
    assertEquals(newHistogram.isAutoResize(), histogram.isAutoResize());
    Assert.assertTrue(histogram.hashCode() == newHistogram.hashCode());
    assertEquals(histogram.getNeededByteBufferCapacity(), newHistogram.copy().getNeededByteBufferCapacity());
    assertEquals(histogram.getNeededByteBufferCapacity(), newHistogram.getNeededByteBufferCapacity());
}

Example 54 with Deflater

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

the class DeflaterSinkTest method deflateIntoNonemptySink.

@Test
public void deflateIntoNonemptySink() throws Exception {
    String original = "They're moving in herds. They do move in herds.";
    // Exercise all possible offsets for the outgoing segment.
    for (int i = 0; i < Segment.SIZE; i++) {
        Buffer data = new Buffer().writeUtf8(original);
        Buffer sink = new Buffer().writeUtf8(repeat('a', i));
        DeflaterSink deflaterSink = new DeflaterSink(sink, new Deflater());
        deflaterSink.write(data, data.size());
        deflaterSink.close();
        sink.skip(i);
        Buffer inflated = inflate(sink);
        assertEquals(original, inflated.readUtf8());
    }
}

Example 55 with Deflater

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

the class DeflaterSinkTest method deflatePoorlyCompressed.

@Test
public void deflatePoorlyCompressed() throws IOException {
    ByteString original = randomBytes(1024 * 1024);
    Buffer data = new Buffer();
    data.write(original);
    Buffer sink = new Buffer();
    DeflaterSink deflaterSink = new DeflaterSink(sink, new Deflater());
    deflaterSink.write(data, data.size());
    deflaterSink.close();
    Buffer inflated = inflate(sink);
    assertEquals(original, inflated.readByteString());
}