Example usage for java.nio ByteBuffer flip

List of usage examples for java.nio ByteBuffer flip

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Introduction

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

Prototype

public final Buffer flip()

Source Link

Document

Flips this buffer.

Usage

From source file:org.apache.hadoop.oncrpc.TestFrameDecoder.java

@Test
public void testMultipleFrames() {
    RpcFrameDecoder decoder = new RpcFrameDecoder();

    // Test multiple frames
    byte[] fragment1 = new byte[4 + 10];
    fragment1[0] = 0; // not final fragment
    fragment1[1] = 0;/*w  w w.  ja v  a2  s  . c  om*/
    fragment1[2] = 0;
    fragment1[3] = (byte) 10; // fragment size = 10 bytes
    assertFalse(XDR.isLastFragment(fragment1));
    assertTrue(XDR.fragmentSize(fragment1) == 10);

    // decoder should wait for the final fragment
    ByteBuffer buffer = ByteBuffer.allocate(4 + 10);
    buffer.put(fragment1);
    buffer.flip();
    ChannelBuffer buf = new ByteBufferBackedChannelBuffer(buffer);
    ChannelBuffer channelBuffer = (ChannelBuffer) decoder.decode(Mockito.mock(ChannelHandlerContext.class),
            Mockito.mock(Channel.class), buf);
    assertTrue(channelBuffer == null);

    byte[] fragment2 = new byte[4 + 10];
    fragment2[0] = (byte) (1 << 7); // final fragment
    fragment2[1] = 0;
    fragment2[2] = 0;
    fragment2[3] = (byte) 10; // fragment size = 10 bytes
    assertTrue(XDR.isLastFragment(fragment2));
    assertTrue(XDR.fragmentSize(fragment2) == 10);

    buffer = ByteBuffer.allocate(4 + 10);
    buffer.put(fragment2);
    buffer.flip();
    buf = new ByteBufferBackedChannelBuffer(buffer);
    channelBuffer = (ChannelBuffer) decoder.decode(Mockito.mock(ChannelHandlerContext.class),
            Mockito.mock(Channel.class), buf);
    assertTrue(channelBuffer != null);
    // Complete frame should have to total size 10+10=20
    assertEquals(20, channelBuffer.readableBytes());
}

From source file:org.apache.nifi.avro.AvroTypeUtil.java

public static ByteBuffer convertByteArray(final Object[] bytes) {
    final ByteBuffer bb = ByteBuffer.allocate(bytes.length);
    for (final Object o : bytes) {
        if (o instanceof Byte) {
            bb.put(((Byte) o).byteValue());
        } else {/*  w  w w.j  ava 2s. com*/
            throw new IllegalTypeConversionException(
                    "Cannot convert value " + bytes + " of type " + bytes.getClass() + " to ByteBuffer");
        }
    }
    bb.flip();
    return bb;
}

From source file:edu.hawaii.soest.kilonalu.adcp.EnsembleHeader.java

/**
 *  Constructor.  This method populates the Header fields from the given
 *  ByteBuffer of data passed in as an argument.
 *
 * @param ensembleBuffer the ByteBuffer that contains the binary ensemble data
 *//*ww w .j  a  va2s . c o m*/
public EnsembleHeader(ByteBuffer ensembleBuffer, Ensemble ensemble) {

    // prepare the ensemble buffer for reading
    ensembleBuffer.flip();

    // define the temporary arrays for passing bytes
    byte[] oneByte = new byte[1];
    byte[] twoBytes = new byte[2];

    // set each of the Ensemble Header fields n the order that they are 
    // read from the byte stream
    ensembleBuffer.get(twoBytes);
    setHeaderID(twoBytes);
    headerID.flip();
    ensemble.addToByteSum(twoBytes);

    ensembleBuffer.get(twoBytes);
    setNumberOfBytesInEnsemble(twoBytes);
    numberOfBytesInEnsemble.flip();
    ensemble.addToByteSum(twoBytes);

    ensembleBuffer.get(oneByte);
    setHeaderSpare(oneByte);
    headerSpare.flip();
    ensemble.addToByteSum(oneByte);

    ensembleBuffer.get(oneByte);
    setNumberOfDataTypes(oneByte);
    numberOfDataTypes.flip();
    ensemble.addToByteSum(oneByte);

    // set the dataTypeOffsets ByteBuffer size
    dataTypeOffsets = ByteBuffer.allocate(((int) getNumberOfDataTypes().get()) * 2);
    numberOfDataTypes.flip();
    byte[] offsetBytes = new byte[(getNumberOfDataTypes().get() * 2)];
    numberOfDataTypes.flip();
    ensembleBuffer.get(offsetBytes);
    setDataTypeOffsets(offsetBytes);
    dataTypeOffsets.flip();
    ensemble.addToByteSum(offsetBytes);

}

From source file:eu.scape_project.arc2warc.PayloadContent.java

public InputStream getPayloadContentAsInputStream() throws IOException {
    if (length >= buffer.length) {
        File tempDir = org.apache.commons.io.FileUtils.getTempDirectory();
        final File tmp = File.createTempFile(RandomStringUtils.randomAlphabetic(10), "tmp", tempDir);
        tmp.deleteOnExit();//from  w  w  w  .j  a  va  2  s.c o  m
        FileOutputStream outputStream = null;
        try {
            outputStream = new FileOutputStream(tmp);
            copyAndCheck(outputStream);
        } finally {
            IOUtils.closeQuietly(outputStream);
        }
        return new FileInputStream(tmp);
    } else {
        final ByteBuffer wrap = ByteBuffer.wrap(buffer);
        wrap.clear();
        OutputStream outStream = StreamUtils.newOutputStream(wrap);
        copyAndCheck(outStream);
        wrap.flip();
        return StreamUtils.newInputStream(wrap);
    }
}

From source file:com.unister.semweb.drums.file.RepairIndexTest.java

/** Converts the given array of {@link TestStorable} to a consecutive {@link ByteBuffer}. */
private ByteBuffer convert(TestStorable[] toConvert) {
    ByteBuffer converter = ByteBuffer.allocate(toConvert.length * globalParameters.getElementSize());
    for (TestStorable oneTestStorable : toConvert) {
        converter.put(oneTestStorable.toByteBuffer());
    }//from   w  w  w.j a va  2  s. c om
    converter.flip();
    return converter;
}

From source file:ch.cyberduck.core.sds.triplecrypt.CryptoInputStream.java

private int readNextChunk() throws IOException {
    final ByteBuffer ciphertextBuf = ByteBuffer.allocate(SDSSession.DEFAULT_CHUNKSIZE);
    final int read = IOUtils.read(proxy, ciphertextBuf.array());
    if (lastread == 0) {
        return IOUtils.EOF;
    }/*from   w w w. j  a v  a2s  . c  o m*/
    ciphertextBuf.position(read);
    ciphertextBuf.flip();
    try {
        final PlainDataContainer pDataContainer;
        if (read == 0) {
            final PlainDataContainer c1 = cipher
                    .processBytes(createEncryptedDataContainer(ciphertextBuf.array(), read, null));
            final PlainDataContainer c2 = cipher.doFinal(new EncryptedDataContainer(null, tag));
            pDataContainer = new PlainDataContainer(ArrayUtils.addAll(c1.getContent(), c2.getContent()));
        } else {
            pDataContainer = cipher
                    .processBytes(createEncryptedDataContainer(ciphertextBuf.array(), read, null));
        }
        final byte[] content = pDataContainer.getContent();
        buffer = ByteBuffer.allocate(content.length);
        buffer.put(content);
        buffer.flip();
        lastread = read;
        return content.length;
    } catch (CryptoException e) {
        throw new IOException(e);
    }
}

From source file:cn.ac.ncic.mastiff.io.coding.RunLengthEncodingIntReader.java

public byte[] CompressensureDecompressed() throws IOException {
    FlexibleEncoding.ORC.DynamicByteArray dynamicBuffer = new FlexibleEncoding.ORC.DynamicByteArray();
    dynamicBuffer.add(inBuf.getData(), 0, inBuf.getLength());
    ByteBuffer byteBuf = ByteBuffer.allocate(dynamicBuffer.size());
    dynamicBuffer.setByteBuffer(byteBuf, 0, dynamicBuffer.size());
    byteBuf.flip();
    FlexibleEncoding.ORC.InStream instream = FlexibleEncoding.ORC.InStream.create("test", byteBuf, null,
            dynamicBuffer.size());//from w ww.  j a  va2 s . c  o  m
    RunLengthIntegerReader rlein = new RunLengthIntegerReader(instream, true);
    DataOutputBuffer decoding = new DataOutputBuffer();
    //  decompressedSize = bb.getInt();
    decoding.writeInt(decompressedSize);
    decoding.writeInt(numPairs);
    decoding.writeInt(startPos);
    for (int i = 0; i < numPairs; i++) {
        int tmp = (int) rlein.next();
        decoding.writeInt(tmp);
    }
    byteBuf.clear();
    inBuf.close();
    return decoding.getData();
}

From source file:cn.ac.ncic.mastiff.io.coding.RunLengthEncodingIntReader.java

@Override
public byte[] ensureDecompressed() throws IOException {
    FlexibleEncoding.ORC.DynamicByteArray dynamicBuffer = new FlexibleEncoding.ORC.DynamicByteArray();
    dynamicBuffer.add(inBuf.getData(), 12, inBuf.getLength() - 12);
    ByteBuffer byteBuf = ByteBuffer.allocate(dynamicBuffer.size());
    dynamicBuffer.setByteBuffer(byteBuf, 0, dynamicBuffer.size());
    byteBuf.flip();
    FlexibleEncoding.ORC.InStream instream = FlexibleEncoding.ORC.InStream.create("test", byteBuf, null,
            dynamicBuffer.size());//from w ww.  jav  a 2s .  c o  m
    RunLengthIntegerReader rlein = new RunLengthIntegerReader(instream, true);
    DataOutputBuffer decoding = new DataOutputBuffer();
    decoding.writeInt(decompressedSize);
    decoding.writeInt(numPairs);
    decoding.writeInt(startPos);
    for (int i = 0; i < numPairs; i++) {
        int tmp = (int) rlein.next();
        decoding.writeInt(tmp);
    }
    byteBuf.clear();
    inBuf.close();
    return decoding.getData();

}

From source file:io.undertow.server.WriteTimeoutTestCase.java

@Test
public void testWriteTimeout() throws IOException, InterruptedException {
    DefaultServer.setRootHandler(new HttpHandler() {
        @Override/*from   w w w .  j a  v a2 s.com*/
        public void handleRequest(final HttpServerExchange exchange) throws Exception {
            final StreamSinkChannel response = exchange.getResponseChannel();
            try {
                response.setOption(Options.WRITE_TIMEOUT, 10);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }

            final int capacity = 1 * 1024 * 1024; //1mb

            final ByteBuffer originalBuffer = ByteBuffer.allocateDirect(capacity);
            for (int i = 0; i < capacity; ++i) {
                originalBuffer.put((byte) '*');
            }
            originalBuffer.flip();
            response.getWriteSetter().set(new ChannelListener<Channel>() {

                private ByteBuffer buffer = originalBuffer.duplicate();
                int count = 0;

                @Override
                public void handleEvent(final Channel channel) {
                    do {
                        try {
                            int res = response.write(buffer);
                            if (res == 0) {
                                return;
                            }
                        } catch (IOException e) {
                            exception = e;
                            errorLatch.countDown();
                        }
                        if (!buffer.hasRemaining()) {
                            count++;
                            buffer = originalBuffer.duplicate();
                        }
                    } while (count < 1000);
                    exchange.endExchange();
                }
            });
            response.wakeupWrites();
        }
    });

    final TestHttpClient client = new TestHttpClient();
    try {
        HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL());
        try {
            HttpResponse result = client.execute(get);
            InputStream content = result.getEntity().getContent();
            byte[] buffer = new byte[512];
            int r = 0;
            while ((r = content.read(buffer)) > 0) {
                Thread.sleep(200);
                if (exception != null) {
                    Assert.assertEquals(WriteTimeoutException.class, exception.getClass());
                    return;
                }
            }
            Assert.fail("Write did not time out");
        } catch (IOException e) {
            if (errorLatch.await(5, TimeUnit.SECONDS)) {
                Assert.assertEquals(WriteTimeoutException.class, exception.getClass());
            } else {
                Assert.fail("Write did not time out");
            }
        }
    } finally {
        client.getConnectionManager().shutdown();
    }
}

From source file:cn.ac.ncic.mastiff.io.coding.DeltaBinaryBitPackingZigZarIntReader.java

public byte[] CompressensureDecompressed() throws IOException {
    FlexibleEncoding.ORC.DynamicByteArray dynamicBuffer = new FlexibleEncoding.ORC.DynamicByteArray();
    dynamicBuffer.add(inBuf.getData(), 0, inBuf.getLength());
    FlexibleEncoding.Parquet.DeltaBinaryPackingValuesReader reader = new FlexibleEncoding.Parquet.DeltaBinaryPackingValuesReader();
    ByteBuffer byteBuf = ByteBuffer.allocate(dynamicBuffer.size());
    dynamicBuffer.setByteBuffer(byteBuf, 0, dynamicBuffer.size());
    byteBuf.flip();
    reader.initFromPage(numPairs, byteBuf.array(), 0);
    DataOutputBuffer decoding = new DataOutputBuffer();
    decoding.writeInt(decompressedSize);
    decoding.writeInt(numPairs);/*  w  w w .ja  v a  2s  . c om*/
    decoding.writeInt(startPos);
    for (int i = 0; i < numPairs; i++) {

        int tmp = reader.readInteger();
        decoding.writeInt(tmp);
    }
    byteBuf.clear();
    inBuf.close();
    return decoding.getData();
}