Example usage for java.nio ByteBuffer get

List of usage examples for java.nio ByteBuffer get

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Introduction

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

Prototype

public abstract byte get();

Source Link

Document

Returns the byte at the current position and increases the position by 1.

Usage

From source file:edu.tsinghua.lumaqq.qq.Util.java

/**
 * buf???buf?lenbyte??// w  ww  . j a va  2s  . c  o m
 * <p>
 * ?buf??buf????
 * ?buf???len???
 * </p>
 * <p>
 * QQ???GBK?
 * </p>
 * 
 * @param buf
 *          ByteBuffer          
 * @return 
 */
public static String getString(ByteBuffer buf, int len) {
    baos.reset();
    while (buf.hasRemaining() && len-- > 0) {
        baos.write(buf.get());
    }
    return getString(baos.toByteArray());
}

From source file:com.sm.connector.server.MRStore.java

@Override
public void setCurrent(int current) {
    if (current >= getTotalRecord())
        throw new RuntimeException("current " + current + " >= total " + getTotalRecord());
    else {/*from  w w  w  .  j  a  va  2 s  .co m*/
        curRecord = current;
        if (current == 0)
            return;
        //set 3 channel position
        long pos = OFFSET + (long) getCurRecord() * RECORD_SIZE;
        try {
            //read the first index record
            ByteBuffer buf = ByteBuffer.allocate(RECORD_SIZE);
            //re read the index buffer
            indexChannel.read(buf, pos);
            buf.rewind();
            long len = indexChannel.read(indexBuf, pos);
            indexBuf.rewind();
            indexPos = pos + len;
            // data and key pos, need to get from previous index record
            buf.get(); //get status byte
            long key = buf.getLong();
            long keyOff = getOffset(key);
            //long keyLen = getLen( key);
            len = keyChannel.read(keyBuf, keyOff);
            keyBuf.rewind();
            keyPos = keyOff + len;
            //read data channel
            long dataOffset2Len = buf.getLong();
            //long block2version = buf.getLong();
            long dataLen = getLen(dataOffset2Len);
            long offset = getOffset(dataOffset2Len);
            //long blockSize = getSize( block2version);
            len = dataChannel.read(dataBuf, offset);
            dataBuf.rewind();
            dataPos = offset + len;
        } catch (IOException ex) {
            throw new RuntimeException(ex.getMessage(), ex);
        }
    }
}

From source file:edu.tsinghua.lumaqq.qq.Util.java

/**
 * buf???delimit?maxLenbyte//ww w. ja  v a2s . c o m
 * ??
 * <p>
 * ?buf??buf????
 * ?buf???maxLen?
 * </p>
 * <p>
 * QQ???GBK?
 * </p>
 * 
 * @param buf
 *          ByteBuffer
 * @param delimit
 *          delimit
 * @param maxLen
 *          max len to read
 * @return String
 */
public static String getString(ByteBuffer buf, byte delimit, int maxLen) {
    baos.reset();
    while (buf.hasRemaining() && maxLen-- > 0) {
        byte b = buf.get();
        if (b == delimit)
            break;
        else
            baos.write(b);
    }
    while (buf.hasRemaining() && maxLen-- > 0)
        buf.get();
    return getString(baos.toByteArray());
}

From source file:com.healthmarketscience.jackcess.impl.IndexImpl.java

protected IndexImpl(ByteBuffer tableBuffer, List<IndexData> indexDatas, JetFormat format) throws IOException {

    ByteUtil.forward(tableBuffer, format.SKIP_BEFORE_INDEX_SLOT); //Forward past Unknown
    _indexNumber = tableBuffer.getInt();
    int indexDataNumber = tableBuffer.getInt();

    // read foreign key reference info
    byte relIndexType = tableBuffer.get();
    int relIndexNumber = tableBuffer.getInt();
    int relTablePageNumber = tableBuffer.getInt();
    byte cascadeUpdatesFlag = tableBuffer.get();
    byte cascadeDeletesFlag = tableBuffer.get();

    _indexType = tableBuffer.get();/*from w w  w  . j  a v  a  2  s.  c o m*/

    if ((_indexType == FOREIGN_KEY_INDEX_TYPE) && (relIndexNumber != INVALID_INDEX_NUMBER)) {
        _reference = new ForeignKeyReference(relIndexType, relIndexNumber, relTablePageNumber,
                (cascadeUpdatesFlag == CASCADE_UPDATES_FLAG), (cascadeDeletesFlag == CASCADE_DELETES_FLAG));
    } else {
        _reference = null;
    }

    ByteUtil.forward(tableBuffer, format.SKIP_AFTER_INDEX_SLOT); //Skip past Unknown

    _data = indexDatas.get(indexDataNumber);

    _data.addIndex(this);
}

From source file:it.crs4.seal.recab.RecabTableMapper.java

protected void processMapping(AbstractTaggedMapping currentMapping, IMRContext<Text, ObservationCount> context)
        throws IOException, InterruptedException {
    context.increment(ReadCounters.Processed, 1);
    context.increment(BaseCounters.All, currentMapping.getLength());

    if (readFailsFilters(currentMapping))
        return;/*  ww w.  jav a 2s  . com*/

    final String contig = currentMapping.getContig();

    int left, right; // left and right "limits" within the current sequence
    if (currentMapping.isTemplateLengthAvailable()
            && currentMapping.getTemplateLength() < currentMapping.getLength()) {
        // Insert size is less than the read size, so we've sequenced part of the read adapter.
        // We need to trim it the last read_length - insert_size bases sequenced.
        if (currentMapping.isOnReverse()) {
            // trim from front
            left = currentMapping.getLength() - currentMapping.getTemplateLength();
            right = currentMapping.getLength();
        } else {
            // trim from the back
            left = 0;
            right = currentMapping.getTemplateLength();
        }

        context.increment(BaseCounters.AdaptorBasesTrimmed, currentMapping.getLength() - (right - left));
    } else {
        left = 0;
        right = currentMapping.getLength();
    }

    currentMapping.calculateReferenceCoordinates(referenceCoordinates);
    currentMapping.calculateReferenceMatches(referenceMatches);

    for (Covariate cov : covariateList)
        cov.applyToMapping(currentMapping);

    final ByteBuffer seq = currentMapping.getSequence();
    final ByteBuffer qual = currentMapping.getBaseQualities();

    if (left > 0) {
        // we're using a relative get() method in the loop below, so here we
        // advance the buffer position to our starting point.
        seq.position(seq.position() + left);
        qual.position(qual.position() + left);
    }

    for (int i = left; i < right; ++i) {
        byte base = seq.get();
        byte quality = qual.get();

        if (base == 'N' || quality <= SANGER_OFFSET)
            context.increment(BaseCounters.BadBases, 1);
        else {
            int pos = referenceCoordinates.get(i);
            if (pos > 0) // valid reference position
            {
                // is it a known variation site?
                if (skipKnownVariantPositions && snps.isVariantLocation(contig, pos)) {
                    context.increment(BaseCounters.VariantBases, 1);

                    if (!referenceMatches.get(i))
                        context.increment(BaseCounters.VariantMismatches, 1);
                } else {
                    // use this base
                    context.increment(BaseCounters.Used, 1);

                    key.clear();
                    for (Covariate cov : covariateList) {
                        String tmp = cov.getValue(i);
                        key.append(tmp.getBytes(RecabTable.ASCII), 0, tmp.length());
                        key.append(RecabTable.TableDelimBytes, 0, RecabTable.TableDelimBytes.length);
                    }

                    boolean match = referenceMatches.get(i);
                    if (match) {
                        value.set(1, 0); // (num observations, num mismatches)
                    } else { // mismatch
                        context.increment(BaseCounters.NonVariantMismatches, 1);
                        value.set(1, 1);
                    }

                    context.write(key, value);
                }
            }
        }
    }
}

From source file:net.sf.jinsim.response.ResponseFactory.java

public InSimResponse getPacketData(ByteBuffer buffer) throws UnhandledPacketTypeException,
        BufferUnderflowException, InstantiationException, IllegalAccessException {
    InSimResponse insimResponse = null;/*from  w w  w  .  ja va2  s  .c  om*/
    /*
    if (buffer.limit() == 91) {
       // is OutGauge message
       insimResponse = new OutGaugeResponse();
    } else if (buffer.limit() == 63) {
       // is OutSim message
               
       log.debug("OutSim is not processed");
    } else 
     */
    if (buffer.limit() >= 3) {
        int packetId = buffer.get() & 0xFF;
        PacketType packetType = PacketType.getPacket(packetId);
        /*
        if (log.isDebugEnabled()) {
           log.debug("Packet is of type " + packetType);
        }
        */
        Class<? extends InSimResponse> insimResponseClass = (Class<? extends InSimResponse>) registeredTypes
                .get(packetType);
        if (insimResponseClass == null) {
            buffer.position(buffer.limit());
            throw new UnhandledPacketTypeException(packetId + ": is unkown");
        }
        insimResponse = (InSimResponse) insimResponseClass.newInstance();
    } else {
        if (log.isDebugEnabled()) {
            String bufferBytes = "";
            for (int i = 0; i < buffer.limit(); i++) {
                bufferBytes += buffer.get() + ", ";
            }
            log.debug("unknown packet: " + bufferBytes);
        } else {
            buffer.position(buffer.limit());
        }
    }

    if (insimResponse == null) {
        throw new UnhandledPacketTypeException("Can not identify response packet");
    }
    try {
        insimResponse.construct(buffer);
    } catch (BufferUnderflowException ex) {
        log.error(ex);
    }
    /*
     if (log.isDebugEnabled()) {
        log.debug("InSimResponse {packet size= " + (buffer.limit()+1) + "}: " + insimResponse);
     }
     */
    return insimResponse;
}

From source file:io.github.dsheirer.source.tuner.hackrf.HackRFTunerController.java

public int readByte(Request request, int value, int index, boolean signed) throws UsbException {
    ByteBuffer buffer = readArray(request, value, index, 1);

    if (signed) {
        return (int) (buffer.get());
    } else {/*w  w w . ja v  a2  s  . co  m*/
        return (int) (buffer.get() & 0xFF);
    }
}

From source file:com.healthmarketscience.jackcess.Index.java

protected Index(ByteBuffer tableBuffer, List<IndexData> indexDatas, JetFormat format) throws IOException {

    ByteUtil.forward(tableBuffer, format.SKIP_BEFORE_INDEX_SLOT); //Forward past Unknown
    _indexNumber = tableBuffer.getInt();
    int indexDataNumber = tableBuffer.getInt();

    // read foreign key reference info
    byte relIndexType = tableBuffer.get();
    int relIndexNumber = tableBuffer.getInt();
    int relTablePageNumber = tableBuffer.getInt();
    byte cascadeUpdatesFlag = tableBuffer.get();
    byte cascadeDeletesFlag = tableBuffer.get();

    _indexType = tableBuffer.get();// www. ja  v  a2s.co m

    if ((_indexType == FOREIGN_KEY_INDEX_TYPE) && (relIndexNumber != INVALID_INDEX_NUMBER)) {
        _reference = new ForeignKeyReference(relIndexType, relIndexNumber, relTablePageNumber,
                (cascadeUpdatesFlag == CASCADE_UPDATES_FLAG), (cascadeDeletesFlag == CASCADE_DELETES_FLAG));
    } else {
        _reference = null;
    }

    ByteUtil.forward(tableBuffer, format.SKIP_AFTER_INDEX_SLOT); //Skip past Unknown

    _data = indexDatas.get(indexDataNumber);

    _data.addIndex(this);
}

From source file:ed.net.lb.LBCall.java

protected WhatToDo handleRead(ByteBuffer buf, Connection conn) {

    _logger.debug(3, "handleRead  _state:" + _state);

    if (_state == State.WAITING || _state == State.IN_HEADER) {
        // TODO: should i read this all in at once                
        if (_line == null)
            _line = new StringBuilder();
        while (buf.hasRemaining()) {
            char c = (char) buf.get();
            if (c == '\r')
                continue;
            if (c == '\n') {
                if (_line.length() == 0) {
                    _logger.debug(3, "end of header");
                    _state = State.READY_TO_STREAM;
                    break;
                }/* www  .  j a  v a  2s  . c  om*/

                String line = _line.toString();

                if (_state == State.WAITING) {
                    int idx = line.indexOf(" ");
                    if (idx < 0) {
                        backendError(ServerErrorType.INVALID, "invalid first line [" + line + "]");
                        return WhatToDo.ERROR;
                    }
                    line = line.substring(idx + 1).trim();
                    idx = line.indexOf(" ");
                    if (idx < 0)
                        _response.setResponseCode(Integer.parseInt(line));
                    else
                        _response.setStatus(Integer.parseInt(line.substring(0, idx)),
                                line.substring(idx + 1).trim());

                    _logger.debug(3, "got first line ", line);
                    _state = State.IN_HEADER;
                } else {
                    int idx = line.indexOf(":");
                    if (idx < 0) {
                        backendError(ServerErrorType.INVALID, "invalid line [ " + line + "]");
                        return WhatToDo.ERROR;
                    }
                    String name = line.substring(0, idx);
                    String value = line.substring(idx + 1).trim();
                    _logger.debug(3, "got header line ", line);

                    if (name.equalsIgnoreCase("Connection")) {
                        _keepalive = !value.toLowerCase().contains("close");
                    } else {
                        _response.addHeader(name, value);
                    }

                }
                _line.setLength(0);
                continue;
            }
            _line.append(c);
        }

        if (_state != State.READY_TO_STREAM)
            return WhatToDo.CONTINUE;

        _logger.debug(3, "starting to stream data");
    }

    if (_state == State.READY_TO_STREAM) {
        MyChunk chunk = new MyChunk(this, conn, _response.getContentLength(), buf);
        _response.sendFile(new MySender(chunk));
        _state = State.STREAMING;
    }

    try {
        _response.done();
    } catch (IOException ioe) {
        _logger.debug(1, "client error", ioe);
        return WhatToDo.CLIENT_ERROR;
    }

    if (isDone() && !_keepalive)
        return WhatToDo.DONE_AND_CLOSE;

    if (_request.isHeadRequest()) {
        assert (_response.isFullySent());
        _lbsuccess(conn);
        return WhatToDo.DONE_AND_CONTINUE;
    }

    return WhatToDo.PAUSE;
}

From source file:io.fabric8.maven.docker.access.log.LogRequestor.java

private boolean readStreamFrame(InputStream is) throws IOException, LogCallback.DoneException {
    // Read the header, which is composed of eight bytes. The first byte is an integer
    // indicating the stream type (0 = stdin, 1 = stdout, 2 = stderr), the next three are thrown
    // out, and the final four are the size of the remaining stream as an integer.
    ByteBuffer headerBuffer = ByteBuffer.allocate(8);
    headerBuffer.order(ByteOrder.BIG_ENDIAN);
    try {//from   w  w  w  .jav  a  2  s  . co  m
        this.readFully(is, headerBuffer.array());
    } catch (NoBytesReadException e) {
        // Not bytes read for stream. Return false to stop consuming stream.
        return false;
    } catch (EOFException e) {
        throw new IOException("Failed to read log header. Could not read all 8 bytes. " + e.getMessage(), e);
    }

    // Grab the stream type (stdout, stderr, stdin) from first byte and throw away other 3 bytes.
    int type = headerBuffer.get();

    // Skip three bytes, then read size from remaining four bytes.
    int size = headerBuffer.getInt(4);

    // Ignore empty messages and keep reading.
    if (size <= 0) {
        return true;
    }

    // Read the actual message
    ByteBuffer payload = ByteBuffer.allocate(size);
    try {
        ByteStreams.readFully(is, payload.array());
    } catch (EOFException e) {
        throw new IOException("Failed to read log message. Could not read all " + size + " bytes. "
                + e.getMessage() + " [ Header: " + Hex.encodeHexString(headerBuffer.array()) + "]", e);
    }

    String message = Charsets.UTF_8.newDecoder().decode(payload).toString();
    callLogCallback(type, message);
    return true;
}