Example usage for java.nio ByteBuffer position

List of usage examples for java.nio ByteBuffer position

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Introduction

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

Prototype

public final int position()

Source Link

Document

Returns the position of this buffer.

Usage

From source file:byps.test.TestSerializeInlineInstances.java

private void internalTestSerializeInlineInstance(Actor obj, String jsonText) throws BException {
    BOutput bout = transport.getOutput();
    bout.header.messageId = 123;//from   w w w  .  j  ava  2  s  .c o m
    bout.header.targetId = new BTargetId(1, 1, 2);

    bout.store(obj);

    ByteBuffer buf = bout.toByteBuffer();
    TestUtils.printBuffer(log, buf);

    if (TestUtils.protocol == BProtocolJson.BINARY_MODEL && jsonText != null) {
        try {
            String jsonTextR = new String(buf.array(), buf.position(), buf.limit(), "UTF-8");
            TestUtils.assertEquals(log, "jsonText", jsonText, jsonTextR);
        } catch (UnsupportedEncodingException ignored) {
        }
    }

    BInput bin = transport.getInput(null, buf);

    Object objR = (Object) bin.load();

    TestUtils.assertEquals(log, "obj.class", obj.getClass(), objR.getClass());

    if (obj.position == null) {
        obj.position = new Matrix2D();
    }

    TestUtils.assertEquals(log, "obj", obj, objR);
}

From source file:edu.umass.cs.gigapaxos.paxospackets.AcceptReplyPacket.java

/**
 * @param bbuf/*from w w w. j  av  a  2s .c  om*/
 * @throws UnsupportedEncodingException
 * @throws UnknownHostException
 */
public AcceptReplyPacket(ByteBuffer bbuf) throws UnsupportedEncodingException, UnknownHostException {
    super(bbuf);
    int paxosIDLength = this.getPaxosID().getBytes(CHARSET).length;
    assert (bbuf.position() == SIZEOF_PAXOSPACKET_FIXED + paxosIDLength);
    this.acceptor = bbuf.getInt();
    this.ballot = new Ballot(bbuf.getInt(), bbuf.getInt());
    this.slotNumber = bbuf.getInt();
    this.maxCheckpointedSlot = bbuf.getInt();
    this.requestID = bbuf.getLong();
    if (bbuf.get() == (byte) 1)
        this.setDigestRequest();
    assert (bbuf.position() == SIZEOF_PAXOSPACKET_FIXED + paxosIDLength + SIZEOF_ACCEPTREPLY) : bbuf.position()
            + " != [" + SIZEOF_PAXOSPACKET_FIXED + " + " + paxosIDLength + " + " + SIZEOF_ACCEPTREPLY + "]";
}

From source file:libepg.epg.section.sectionreconstructor.SectionReconstructor.java

/**
 * ??????????????????//www .j  a va2  s  . c  o  m
 * ByteBuffer?array()????????????????????
 *
 */
private synchronized void addToReturnObject(ByteBuffer buf, Set<byte[]> dest) {
    byte[] BeforeCutDown = buf.array();
    byte[] AfterCutDown = new byte[buf.position()];
    System.arraycopy(BeforeCutDown, 0, AfterCutDown, 0, AfterCutDown.length);
    if (LOG.isTraceEnabled()) {
        MessageFormat msg1 = new MessageFormat("\n??={0}\n?={1}");
        Object[] parameters1 = { Hex.encodeHexString(BeforeCutDown), Hex.encodeHexString(AfterCutDown) };
        LOG.trace(msg1.format(parameters1));
    }
    if (dest.add(AfterCutDown)) {
        if (LOG.isTraceEnabled()) {
            MessageFormat msg2 = new MessageFormat("\n???={0}");
            Object[] parameters2 = { Hex.encodeHexString(AfterCutDown) };
            LOG.trace(msg2.format(parameters2));
        }
    } else if (LOG.isTraceEnabled()) {
        MessageFormat msg3 = new MessageFormat("\n???????={0}");
        Object[] parameters3 = { Hex.encodeHexString(AfterCutDown) };
        LOG.trace(msg3.format(parameters3));
    }
}

From source file:com.doplgangr.secrecy.FileSystem.File.java

public java.io.File readFile(CryptStateListener listener) {
    decrypting = true;/*from  w w  w  . j  ava  2 s. c  om*/
    InputStream is = null;
    OutputStream out = null;
    java.io.File outputFile = null;
    try {
        outputFile = java.io.File.createTempFile("tmp" + name, "." + FileType, storage.getTempFolder());
        outputFile.mkdirs();
        outputFile.createNewFile();
        AES_Encryptor enc = new AES_Encryptor(key);
        is = new CipherInputStream(new FileInputStream(file), enc.decryptstream());
        listener.setMax((int) file.length());
        ReadableByteChannel inChannel = Channels.newChannel(is);
        FileChannel outChannel = new FileOutputStream(outputFile).getChannel();
        ByteBuffer byteBuffer = ByteBuffer.allocate(Config.bufferSize);
        while (inChannel.read(byteBuffer) >= 0 || byteBuffer.position() > 0) {
            byteBuffer.flip();
            outChannel.write(byteBuffer);
            byteBuffer.compact();
            listener.updateProgress((int) outChannel.size());
        }
        inChannel.close();
        outChannel.close();
        Util.log(outputFile.getName(), outputFile.length());
        return outputFile;
    } catch (FileNotFoundException e) {
        listener.onFailed(2);
        Util.log("Encrypted File is missing", e.getMessage());
    } catch (IOException e) {
        Util.log("IO Exception while decrypting", e.getMessage());
        if (e.getMessage().contains("pad block corrupted"))
            listener.onFailed(1);
        else
            e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        listener.Finished();
        decrypting = false;
        try {
            if (is != null) {
                is.close();
            }
            if (out != null) {
                out.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    // An error occured. Too Bad
    if (outputFile != null)
        storage.purgeFile(outputFile);
    return null;
}

From source file:com.kylinolap.common.hll.HyperLogLogPlusCounter.java

public void writeRegisters(final ByteBuffer out) throws IOException {
    int startPos = out.position();

    final int indexLen = getRegisterIndexSize();
    int size = size();

    // decide output scheme -- map (3*size bytes) or array (2^p bytes)
    byte scheme;// w  w w  .j a  v a  2  s .  c o  m
    if ((indexLen + 1) * size < m)
        scheme = 0; // map
    else
        scheme = 1; // array
    out.put(scheme);

    if (scheme == 0) { // map scheme
        BytesUtil.writeVInt(size, out);
        for (int i = 0; i < m; i++) {
            if (registers[i] > 0) {
                BytesUtil.writeUnsigned(i, indexLen, out);
                out.put(registers[i]);
            }
        }
    } else { // array scheme
        for (int i = 0; i < m; i++) {
            out.put(registers[i]);
        }
    }

    // do compression if needed
    int len = out.position() - startPos;
    if (len < COMPRESSION_THRESHOLD)
        return;

    scheme |= COMPRESSION_FLAG;
    byte[] compressed = DEFAULT_COMPRESSOR.compress(out, startPos + 1, len - 1);
    out.position(startPos);
    out.put(scheme);
    BytesUtil.writeVInt(compressed.length, out);
    out.put(compressed);
}

From source file:com.l2jfree.loginserver.network.L2Client.java

@Override
public boolean decrypt(ByteBuffer buf, int size) {
    boolean ret = false;
    try {//from  w  w  w. j  a v  a2s  .c  o  m
        ret = getLoginCrypt().decrypt(buf.array(), buf.position(), size);
    } catch (IOException e) {
        e.printStackTrace();
        closeNow();
        return false;
    }

    if (!ret) {
        byte[] dump = new byte[size];
        System.arraycopy(buf.array(), buf.position(), dump, 0, size);
        _log.warn("Wrong checksum from client: " + toString());
        closeNow();
    }

    return ret;
}

From source file:org.muckebox.android.net.DownloadRunnable.java

private void handleReceivedData(ByteBuffer data) throws IOException {
    if (!BufferUtils.isEmpty(data)) {
        mBytesTotal += data.position();

        if (mOutputStream != null) {
            mOutputStream.write(data.array(), 0, data.position());
        }/*w w w  .  j a v  a 2s.  c o m*/

        Chunk chunk = new Chunk();

        chunk.bytesTotal = mBytesTotal;
        chunk.buffer = data;

        if (mHandler != null)
            mHandler.sendMessage(mHandler.obtainMessage(MESSAGE_DATA_RECEIVED, (int) mTrackId, 0, chunk));
    }

}

From source file:com.joyent.manta.http.entity.DigestedEntity.java

@Override
public void writeTo(final OutputStream out) throws IOException {
    digest.reset(); // reset the digest state in case we're in a retry

    // If our wrapped entity is backed by a buffer of some form
    // we can read easily read the whole buffer into our message digest.
    if (wrapped instanceof MemoryBackedEntity) {
        final MemoryBackedEntity entity = (MemoryBackedEntity) wrapped;
        final ByteBuffer backingBuffer = entity.getBackingBuffer();

        if (backingBuffer.hasArray()) {
            final byte[] bytes = backingBuffer.array();
            final int offset = backingBuffer.arrayOffset();
            final int position = backingBuffer.position();
            final int limit = backingBuffer.limit();

            digest.update(bytes, offset + position, limit - position);
            backingBuffer.position(limit);

            wrapped.writeTo(out);/*w w w. java  2 s . c  o  m*/
        }
    } else {
        try (DigestOutputStream dout = new DigestOutputStream(digest);
                TeeOutputStream teeOut = new TeeOutputStream(out, dout)) {
            wrapped.writeTo(teeOut);
            teeOut.flush();
        }
    }
}

From source file:com.spectralogic.ds3client.helpers.channels.WindowedSeekableByteChannel_Test.java

@Test(timeout = 1000)
public void writePositionTracking() throws IOException {
    try (final ByteArraySeekableByteChannel channel = new ByteArraySeekableByteChannel()) {
        final Object lock = new Object();
        try (final WindowedSeekableByteChannel window = new WindowedSeekableByteChannel(channel, lock, 2L,
                7L)) {/*w w  w  .ja v a2  s.c o m*/
            ByteBuffer buffer = Charset.forName("UTF-8").encode("bbb");
            assertThat(window.write(buffer), is(3));
            assertThat(buffer.position(), is(3));

            buffer = Charset.forName("UTF-8").encode("cccc");
            assertThat(window.write(buffer), is(4));
            assertThat(buffer.position(), is(4));

            channel.position(0);

            assertThat(channel.toString(), is("\0\0bbbcccc"));
        }
    }
}

From source file:edu.tsinghua.lumaqq.qq.packets.PacketHelper.java

/**
 * ByteBuffer??InPacket?buf???length/*  ww w .  j  a va  2s  . c  o m*/
 * ???bufposition?length?
 * 
 * @param buf
 *             ByteBuffer
 * @param type
 *             
 * @param length
 *             
 * @param debug
 * @return InPacket
 * @throws PacketParseException
 *                ??
 */
private InPacket parseIn(ByteBuffer buf, int length, QQUser user, boolean debug) throws PacketParseException {
    // ???
    int offset = buf.position();

    // ?
    try {
        InPacket ret = parser.parseIncoming(buf, length, user);
        boolean duplicated = isDuplicated(ret);
        boolean needReply = parser.isDuplicatedNeedReply(ret);
        if (duplicated && !needReply && !debug)
            return null;
        else {
            ret.setDuplicated(duplicated);
            return ret;
        }
    } catch (PacketParseException e) {
        throw e;
    } finally {
        buf.position(offset + length);
        parser = null;
    }
}