Example usage for java.nio ByteBuffer allocate

List of usage examples for java.nio ByteBuffer allocate

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Introduction

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

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:jsave.Utils.java

public static int read_uint16(final RandomAccessFile raf) throws IOException {
    byte[] data = new byte[2];
    raf.read(data);//from  w  ww  .j a  va 2s .  c o  m
    ByteBuffer bb = ByteBuffer.allocate(data.length);
    bb.put(data);
    return getUnsignedShort(bb);
}

From source file:com.alvermont.terraj.fracplanet.util.ByteBufferUtils.java

/**
 * The sizes of Java types are fixed and defined by the language spec so
 * this shouldn't be necessary but I'm going to do it anyway - so
 * there!/*from   ww w  .ja v a2s  . c o  m*/
 *
 * @return The number of bytes occupied by a float value
 */
public static int sizeofFloat() {
    final ByteBuffer buffer = ByteBuffer.allocate(10);

    buffer.putFloat(0.0f);

    return buffer.position();
}

From source file:net.fenyo.mail4hotspot.dns.Msg.java

public String debugContent() {
    String retval = "";

    if (input_buffer.length == 0)
        return "invalid null size";

    if (input_buffer[0] == 0) {
        // UTF-8 message type
        retval += "type=text;";

        final ByteBuffer bb = ByteBuffer.allocate(input_buffer.length - 1);
        bb.put(input_buffer, 1, input_buffer.length - 1);
        bb.position(0);/*from w w w  .  j av a  2s .  c  o  m*/
        final String query = Charset.forName("UTF-8").decode(bb).toString();
        retval += "query=" + query + ";";

    } else {
        // binary message type
        retval += "type=binary;";

        final ByteBuffer bb = ByteBuffer.allocate(input_buffer[0]);
        bb.put(input_buffer, 1, input_buffer[0]);
        bb.position(0);
        final String query = Charset.forName("UTF-8").decode(bb).toString();
        retval += "query=" + query + ";";
    }

    return retval;
}

From source file:org.sglover.nlp.EntityExtracter.java

private String getContent(ReadableByteChannel channel) throws IOException {
    StringBuilder sb = new StringBuilder();
    ByteBuffer bb = ByteBuffer.allocate(2048);
    int c = -1;/* w  w  w .  j  a va2 s  . c  o  m*/
    do {
        c = channel.read(bb);
        bb.flip();
        bb.clear();
        sb.append(new String(bb.array(), "UTF-8"));
    } while (c != -1);

    String content = sb.toString();
    return content;
}

From source file:io.blobkeeper.file.util.FileUtils.java

public static long getCrc(@NotNull File file) {
    CRC32 crc = new CRC32();

    while (true) {
        ByteBuffer buffer = ByteBuffer.allocate(CHUNK_SIZE);
        while (buffer.hasRemaining()) {
            int bytes = 0;
            try {
                bytes = file.getFileChannel().read(buffer);
            } catch (IOException e) {
                log.error("Can't read blob file " + file, e);
                throw new IllegalArgumentException(e);
            }/*from   w  w w.  j a va 2 s  .  c o  m*/
            if (bytes < 0) {
                break;
            }
        }
        buffer.flip();
        if (buffer.remaining() == 0) {
            break;
        } else {
            crc.update(buffer.array());
        }
    }

    return crc.getValue();
}

From source file:edu.uci.ics.hyracks.dataflow.std.sort.util.DeletableFrameTupleAppenderTest.java

@Test
public void testClear() throws Exception {
    ByteBuffer buffer = ByteBuffer.allocate(cap);
    appender.clear(buffer);/*  w  w  w  .  j  a v a  2  s  .co  m*/
    assertTrue(appender.getBuffer() == buffer);
    assertTrue(appender.getTupleCount() == 0);
    assertTrue(appender.getContiguousFreeSpace() == cap - 4 - 4);
}

From source file:com.hortonworks.registries.schemaregistry.serdes.avro.AvroSnapshotDeserializer.java

protected SchemaIdVersion retrieveSchemaIdVersion(InputStream payloadInputStream) throws SerDesException {
    // it can be enhanced to have respective protocol handlers for different versions
    // first byte is protocol version/id.
    // protocol format:
    // 1 byte  : protocol version
    // 8 bytes : schema metadata Id
    // 4 bytes : schema version
    ByteBuffer byteBuffer = ByteBuffer.allocate(13);
    try {/* w  w w.  j  a v  a 2  s. com*/
        payloadInputStream.read(byteBuffer.array());
    } catch (IOException e) {
        throw new SerDesException(e);
    }

    byte protocolId = byteBuffer.get();
    if (protocolId != AvroSchemaProvider.CURRENT_PROTOCOL_VERSION) {
        throw new SerDesException(
                "Unknown protocol id [" + protocolId + "] received while deserializing the payload");
    }
    long schemaMetadataId = byteBuffer.getLong();
    int schemaVersion = byteBuffer.getInt();

    return new SchemaIdVersion(schemaMetadataId, schemaVersion);
}

From source file:com.saasovation.common.port.adapter.messaging.slothmq.SlothWorker.java

protected String receive() {
    SocketChannel socketChannel = null;

    try {/*from   w  w w .  j  a  va2 s  .  c om*/
        socketChannel = this.socket.accept();

        if (socketChannel == null) {
            return null; // if non-blocking
        }

        ReadableByteChannel readByteChannel = Channels.newChannel(socketChannel.socket().getInputStream());

        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();

        ByteBuffer readBuffer = ByteBuffer.allocate(8);

        while (readByteChannel.read(readBuffer) != -1) {
            readBuffer.flip();

            while (readBuffer.hasRemaining()) {
                byteArray.write(readBuffer.get());
            }

            readBuffer.clear();
        }

        return new String(byteArray.toByteArray());

    } catch (IOException e) {
        logger.error("Failed to receive because: {}: Continuing...", e.getMessage(), e);
        return null;

    } finally {
        if (socketChannel != null) {
            try {
                socketChannel.close();
            } catch (IOException e) {
                // ignore
            }
        }
    }
}

From source file:com.offbynull.portmapper.common.ByteBufferUtils.java

/**
 * Copy the remaining content of a {@link ByteBuffer} in to a new non-direct {@link ByteBuffer}.
 * @param src buffer to copy//from   ww w.j av  a2 s  .  c  o m
 * @param incrementSrc of {@code true} increments {@code src}'s position
 * @param incrementDst of {@code true} increments {@code dst}'s position
 * @return new buffer with the remaining content in {@code src}
 * @throws NullPointerException if any arguments are {@code null}
 */
public static ByteBuffer copyContents(ByteBuffer src, boolean incrementSrc, boolean incrementDst) {
    Validate.notNull(src);
    if (!incrementSrc) {
        src.mark();
    }

    ByteBuffer dst = ByteBuffer.allocate(src.remaining());
    dst.put(src);

    if (!incrementSrc) {
        src.reset();
    }

    if (!incrementDst) {
        dst.flip();
    }

    return dst;
}

From source file:Main.java

public final static ByteBuffer borrowByteBufferMedium() {
    if (byteBuffersPoolMedium.isEmpty()) {
        return ByteBuffer.allocate(MAX_LINE_BYTES_MEDIUM);
    } else {/*w w  w.ja  v a2s .c o  m*/
        return byteBuffersPoolMedium.remove(0);
    }
}