Example usage for java.nio ByteBuffer hasRemaining

Introduction

In this page you can find the example usage for java.nio ByteBuffer hasRemaining.

Prototype

public final boolean hasRemaining() 

Source Link

Document

Indicates if there are elements remaining in this buffer, that is if position < limit .

Usage

From source file:org.alfresco.contentstore.ChecksumTest.java

private void assertEqual(ByteBuffer expected, ByteBuffer actual, State state) throws IOException {
    int expectedRemaining = expected.remaining();
    int actualRemaining = actual.remaining();

    if (expectedRemaining != actualRemaining) {
        fail("Different lengths");
    }//from   w ww  .  ja  v a  2  s. c o  m
    if (expectedRemaining == 0) {
        return;
    }

    assertEquals(expected.remaining(), actual.remaining());
    while (expected.hasRemaining()) {
        byte expectedByte = expected.get();
        byte actualByte = actual.get();
        state.incIdx(1);
        assertEquals("Not equal at " + state, expectedByte, actualByte);
    }
    ;
}

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From source file:org.apache.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testFoldWithUpperNibbleTriggersOffsetChange() {
    byte[] arr1 = new byte[HyperLogLogCollector.getLatestNumBytesForDenseStorage()];
    Arrays.fill(arr1, (byte) 0x11);
    ByteBuffer buffer1 = ByteBuffer.wrap(arr1);
    buffer1.put(0, VersionOneHyperLogLogCollector.VERSION);
    buffer1.put(1, (byte) 0);
    buffer1.putShort(2, (short) (2047));
    buffer1.put(VersionOneHyperLogLogCollector.HEADER_NUM_BYTES, (byte) 0x1);

    byte[] arr2 = new byte[HyperLogLogCollector.getLatestNumBytesForDenseStorage()];
    Arrays.fill(arr2, (byte) 0x11);
    ByteBuffer buffer2 = ByteBuffer.wrap(arr2);
    buffer2.put(0, VersionOneHyperLogLogCollector.VERSION);
    buffer2.put(1, (byte) 0);
    buffer2.putShort(2, (short) (2048));

    HyperLogLogCollector collector = HyperLogLogCollector.makeCollector(buffer1);
    collector.fold(buffer2);//from  w ww  .  j a va2s .c o  m

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), VersionOneHyperLogLogCollector.VERSION);
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 0);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertFalse(outBuffer.hasRemaining());
}

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From source file:com.github.ambry.utils.UtilsTest.java

@Test
public void testSerializeNullableString() {
    String randomString = getRandomString(10);
    ByteBuffer outputBuffer = ByteBuffer.allocate(4 + randomString.getBytes().length);
    Utils.serializeNullableString(outputBuffer, randomString);
    outputBuffer.flip();/*from  w  w w .  ja v  a  2 s. c  o m*/
    int length = outputBuffer.getInt();
    assertEquals("Input and output string lengths don't match ", randomString.getBytes().length, length);
    byte[] output = new byte[length];
    outputBuffer.get(output);
    assertFalse("Output buffer shouldn't have any remaining, but has " + outputBuffer.remaining() + " bytes",
            outputBuffer.hasRemaining());
    String outputString = new String(output);
    assertEquals("Input and output strings don't match", randomString, outputString);

    randomString = null;
    outputBuffer = ByteBuffer.allocate(4);
    Utils.serializeNullableString(outputBuffer, randomString);
    outputBuffer.flip();
    length = outputBuffer.getInt();
    assertEquals("Input and output string lengths don't match", 0, length);
    output = new byte[length];
    outputBuffer.get(output);
    assertFalse("Output buffer shouldn't have any remaining, but has " + outputBuffer.remaining() + " bytes",
            outputBuffer.hasRemaining());
    outputString = new String(output);
    assertEquals("Output string \"" + outputString + "\" expected to be empty", outputString, "");
}

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From source file:io.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testFoldWithDifferentOffsets1() throws Exception {
    ByteBuffer biggerOffset = makeCollectorBuffer(1, (byte) 0x00, 0x11);
    ByteBuffer smallerOffset = makeCollectorBuffer(0, (byte) 0x20, 0x00);

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);/*from  www.ja  v  a  2 s .  c  om*/
    collector.fold(smallerOffset);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(smallerOffset);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }
}

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From source file:io.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testFoldWithArbitraryInitialPositions() throws Exception {
    ByteBuffer biggerOffset = shiftedBuffer(makeCollectorBuffer(1, (byte) 0x00, 0x11), 10);
    ByteBuffer smallerOffset = shiftedBuffer(makeCollectorBuffer(0, (byte) 0x20, 0x00), 15);

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);/*w w  w  .j a v a 2 s . c  o  m*/
    collector.fold(smallerOffset);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(smallerOffset);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }
}

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From source file:io.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testSparseFoldWithDifferentOffsets1() throws Exception {
    ByteBuffer biggerOffset = makeCollectorBuffer(1, new byte[] { 0x11, 0x10 }, 0x11);
    ByteBuffer sparse = HyperLogLogCollector
            .makeCollector(makeCollectorBuffer(0, new byte[] { 0x00, 0x02 }, 0x00)).toByteBuffer();

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);/*from w  w  w  .  java  2 s  .c o  m*/
    collector.fold(sparse);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 2);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertFalse(outBuffer.hasRemaining());

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(sparse);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 2);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertFalse(outBuffer.hasRemaining());
}

---

From source file:io.druid.hll.HyperLogLogCollectorTest.java

private ByteBuffer makeCollectorBuffer(int offset, byte[] initialBytes, int remainingBytes) {
    short numNonZero = 0;
    for (byte initialByte : initialBytes) {
        numNonZero += computeNumNonZero(initialByte);
    }//from w  w w  .  j  a va2 s .  c  o  m

    final short numNonZeroInRemaining = computeNumNonZero((byte) remainingBytes);
    numNonZero += (short) ((HyperLogLogCollector.NUM_BYTES_FOR_BUCKETS - initialBytes.length)
            * numNonZeroInRemaining);

    ByteBuffer biggerOffset = ByteBuffer.allocate(HyperLogLogCollector.getLatestNumBytesForDenseStorage());
    biggerOffset.put(HLLCV1.VERSION);
    biggerOffset.put((byte) offset);
    biggerOffset.putShort(numNonZero);
    biggerOffset.put((byte) 0);
    biggerOffset.putShort((short) 0);
    biggerOffset.put(initialBytes);
    while (biggerOffset.hasRemaining()) {
        biggerOffset.put((byte) remainingBytes);
    }
    biggerOffset.clear();
    return biggerOffset.asReadOnlyBuffer();
}

---

From source file:org.apache.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testFoldWithDifferentOffsets1() {
    ByteBuffer biggerOffset = makeCollectorBuffer(1, (byte) 0x00, 0x11);
    ByteBuffer smallerOffset = makeCollectorBuffer(0, (byte) 0x20, 0x00);

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);// w w  w.ja  v  a  2  s.c  o m
    collector.fold(smallerOffset);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(smallerOffset);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }
}

---

From source file:org.apache.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testFoldWithArbitraryInitialPositions() {
    ByteBuffer biggerOffset = shiftedBuffer(makeCollectorBuffer(1, (byte) 0x00, 0x11), 10);
    ByteBuffer smallerOffset = shiftedBuffer(makeCollectorBuffer(0, (byte) 0x20, 0x00), 15);

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);//from   w  w w.  java 2s.c o  m
    collector.fold(smallerOffset);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(smallerOffset);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 1);
    Assert.assertEquals(outBuffer.getShort(), 2047);
    outBuffer.get();
    outBuffer.getShort();
    Assert.assertEquals(outBuffer.get(), 0x10);
    while (outBuffer.hasRemaining()) {
        Assert.assertEquals(outBuffer.get(), 0x11);
    }
}

---

From source file:org.apache.druid.hll.HyperLogLogCollectorTest.java

@Test
public void testSparseFoldWithDifferentOffsets1() {
    ByteBuffer biggerOffset = makeCollectorBuffer(1, new byte[] { 0x11, 0x10 }, 0x11);
    ByteBuffer sparse = HyperLogLogCollector
            .makeCollector(makeCollectorBuffer(0, new byte[] { 0x00, 0x02 }, 0x00)).toByteBuffer();

    HyperLogLogCollector collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(biggerOffset);/*from   w w  w  .j  a  v a  2  s. c o  m*/
    collector.fold(sparse);

    ByteBuffer outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 2);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertFalse(outBuffer.hasRemaining());

    collector = HyperLogLogCollector.makeLatestCollector();
    collector.fold(sparse);
    collector.fold(biggerOffset);

    outBuffer = collector.toByteBuffer();

    Assert.assertEquals(outBuffer.get(), collector.getVersion());
    Assert.assertEquals(outBuffer.get(), 2);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertEquals(outBuffer.get(), 0);
    Assert.assertEquals(outBuffer.getShort(), 0);
    Assert.assertFalse(outBuffer.hasRemaining());
}

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