Example usage for java.nio ByteBuffer wrap

Introduction

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

Prototype

public static ByteBuffer wrap(byte[] array, int start, int len) 

Source Link

Document

Creates a new byte buffer by wrapping the given byte array.

Usage

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

@Override
public byte[] getPage() throws IOException {
    if (dataOffset == 3 * Bytes.SIZEOF_INT) // no data appended 
        return null;

    /** We do not compressed the page of data */
    if (compressAlgo == null) {
        bb = ByteBuffer.wrap(page, 0, page.length);
        bb.putInt(dataOffset);//w w w  .j ava 2s  . c om
        bb.putInt(numPairs);
        bb.putInt(startPos);
        return page;
    } else { // compress a page using the specified <i>Algorithm</i>
        outputBuffer.reset();
        outputBuffer.writeInt(dataOffset);
        outputBuffer.writeInt(numPairs);
        outputBuffer.writeInt(startPos);
        outputBuffer.writeInt(page.length - 12);
        compressor = compressAlgo.getCompressor();
        // create the compression stream
        OutputStream os = this.compressAlgo.createCompressionStream(outputBuffer, compressor, 0);
        os.write(page, 3 * Bytes.SIZEOF_INT, dataOffset - 3 * Bytes.SIZEOF_INT);
        os.flush();
        this.compressAlgo.returnCompressor(compressor);
        this.compressor = null;
        return outputBuffer.getData();
    }
}

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

@Override
public byte[] getPage() throws IOException {
    if (dataOffset == 3 * Bytes.SIZEOF_INT)
        return null;
    /** We do not compressed the page of data */
    if (compressAlgo == null) {
        //  bb = ByteBuffer.wrap(page, 0, dataOffset);
        bb = ByteBuffer.wrap(page, 0, page.length);
        bb.putInt(dataOffset);/*from  w ww  .j a v  a2  s. c o  m*/
        bb.putInt(numPairs);
        bb.putInt(startPos);
        return page;
    } else { // compress a page using the specified <i>Algorithm</i>
        outputBuffer.reset();
        outputBuffer.writeInt(dataOffset);
        outputBuffer.writeInt(numPairs);
        outputBuffer.writeInt(startPos);
        outputBuffer.writeInt(page.length - 12);
        compressor = compressAlgo.getCompressor();
        // create the compression stream
        OutputStream os = this.compressAlgo.createCompressionStream(outputBuffer, compressor, 0);
        os.write(page, 3 * Bytes.SIZEOF_INT, page.length - 12);
        os.flush();
        this.compressAlgo.returnCompressor(compressor);
        this.compressor = null;
        return outputBuffer.getData();
    }
}

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From source file:eu.stratosphere.pact.common.io.TextInputFormat.java

public boolean readRecord(PactRecord target, byte[] bytes, int offset, int numBytes) {
    PactString str = this.theString;

    if (this.ascii) {
        str.setValueAscii(bytes, offset, numBytes);
    } else {// w  w  w . ja v  a 2  s  . c  om
        ByteBuffer byteWrapper = this.byteWrapper;
        if (bytes != byteWrapper.array()) {
            byteWrapper = ByteBuffer.wrap(bytes, 0, bytes.length);
            this.byteWrapper = byteWrapper;
        }
        byteWrapper.position(offset);
        byteWrapper.limit(offset + numBytes);

        try {
            CharBuffer result = this.decoder.decode(byteWrapper);
            str.setValue(result);
        } catch (CharacterCodingException e) {
            byte[] copy = new byte[numBytes];
            System.arraycopy(bytes, offset, copy, 0, numBytes);
            LOG.warn("Line could not be encoded: " + Arrays.toString(copy), e);
            return false;
        }
    }

    target.clear();
    target.setField(this.pos, str);
    return true;
}

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

@Override
public byte[] getPage() throws IOException {
    if (dataOffset == 3 * Bytes.SIZEOF_INT) // no data appended 
        return null;
    /** We do not compressed the page of data */
    if (compressAlgo == null) {
        //  bb = ByteBuffer.wrap(page, 0, dataOffset);
        bb = ByteBuffer.wrap(page, 0, page.length);
        bb.putInt(dataOffset);//from  w  ww  . ja  va  2s  . c o  m
        bb.putInt(numPairs);
        bb.putInt(startPos);
        return page;
    } else { // compress a page using the specified <i>Algorithm</i>
        outputBuffer.reset();
        outputBuffer.writeInt(dataOffset);
        outputBuffer.writeInt(numPairs);
        outputBuffer.writeInt(startPos);
        outputBuffer.writeInt(page.length - 12);
        compressor = compressAlgo.getCompressor();
        // create the compression stream
        OutputStream os = this.compressAlgo.createCompressionStream(outputBuffer, compressor, 0);
        os.write(page, 3 * Bytes.SIZEOF_INT, dataOffset - 3 * Bytes.SIZEOF_INT);
        os.flush();
        this.compressAlgo.returnCompressor(compressor);
        this.compressor = null;
        return outputBuffer.getData();
    }
}

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From source file:eu.stratosphere.pact.array.io.StringInputFormat.java

public boolean readRecord(Value[] target, byte[] bytes, int offset, int numBytes) {
    PactString str = this.theString;

    if (this.ascii) {
        str.setValueAscii(bytes, offset, numBytes);
    } else {// www  .jav  a  2s  . c  om
        ByteBuffer byteWrapper = this.byteWrapper;
        if (bytes != byteWrapper.array()) {
            byteWrapper = ByteBuffer.wrap(bytes, 0, bytes.length);
            this.byteWrapper = byteWrapper;
        }
        byteWrapper.clear();
        byteWrapper.position(offset);
        byteWrapper.limit(offset + numBytes);

        try {
            CharBuffer result = this.decoder.decode(byteWrapper);
            str.setValue(result);
        } catch (CharacterCodingException e) {
            byte[] copy = new byte[numBytes];
            System.arraycopy(bytes, offset, copy, 0, numBytes);
            LOG.warn("Line could not be encoded: " + Arrays.toString(copy), e);
            return false;
        }
    }

    target[0] = str;
    return true;
}

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

@Override
public byte[] getPage() throws IOException {
    if (dataOffset == 3 * Bytes.SIZEOF_INT) // no data appended 
        return null;

    /** We do not compressed the page of data */
    if (compressAlgo == null) {
        //  bb = ByteBuffer.wrap(page, 0, dataOffset);
        bb = ByteBuffer.wrap(page, 0, page.length);
        bb.putInt(dataOffset);//from   w  ww.  j  a v  a  2 s  .  c  o  m
        bb.putInt(numPairs);
        bb.putInt(startPos);
        LOG.info("134  page .length " + page.length);
        return page;
    } else { // compress a page using the specified <i>Algorithm</i>
        outputBuffer.reset();
        outputBuffer.writeInt(dataOffset);
        outputBuffer.writeInt(numPairs);
        outputBuffer.writeInt(startPos);
        compressor = compressAlgo.getCompressor();
        // create the compression stream
        OutputStream os = this.compressAlgo.createCompressionStream(outputBuffer, compressor, 0);
        os.write(page, 3 * Bytes.SIZEOF_INT, dataOffset - 3 * Bytes.SIZEOF_INT);
        os.flush();
        this.compressAlgo.returnCompressor(compressor);
        this.compressor = null;
        return outputBuffer.getData();
    }
}

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From source file:com.mellanox.hadoop.mapred.UdaShuffleHandler.java

public static ByteBuffer serializeServiceData(Token<JobTokenIdentifier> jobToken) throws IOException {
    //TODO these bytes should be versioned
    DataOutputBuffer jobToken_dob = new DataOutputBuffer();
    jobToken.write(jobToken_dob);//from   ww  w .  j a v a  2s . c o  m
    return ByteBuffer.wrap(jobToken_dob.getData(), 0, jobToken_dob.getLength());
}

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From source file:hudson.plugins.sonar.utils.MaskPasswordsOutputStream.java

@Override
protected void eol(byte[] bytes, int len) throws IOException {
    String line = charset.decode(ByteBuffer.wrap(bytes, 0, len)).toString();
    if (passwordsAsPattern != null && !line.contains(URL_IN_LOGS)) {
        line = passwordsAsPattern.matcher(line).replaceAll(REPLACEMENT);
    }//from www .  j  a v a  2 s .c o  m
    logger.write(line.getBytes(charset));
}

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

@Override
public byte[] getPage() throws IOException {
    if (dataOffset == 3 * Bytes.SIZEOF_INT) // no data appended 
        return null;
    /** We do not compressed the page of data */
    if (compressAlgo == null) {
        if (valueLen == 4) {
            LOG.info("134 dataOffse  " + dataOffset);
            LOG.info("134 pageLnegth " + page.length);

        }//from   w  ww .ja va  2s .  c  o  m
        //  bb = ByteBuffer.wrap(page, 0, dataOffset);
        bb = ByteBuffer.wrap(page, 0, page.length);
        bb.putInt(dataOffset);
        bb.putInt(numPairs);
        bb.putInt(startPos);
        LOG.info("134  page .length " + page.length);
        System.out.println(
                "154 dataoffset  " + dataOffset + " numPairs  " + numPairs + "  startPos  " + startPos);
        return page;
    } else { // compress a page using the specified <i>Algorithm</i>
        outputBuffer.reset();
        outputBuffer.writeInt(dataOffset);
        outputBuffer.writeInt(numPairs);
        outputBuffer.writeInt(startPos);
        outputBuffer.writeInt(page.length - 12);
        compressor = compressAlgo.getCompressor();
        // create the compression stream
        OutputStream os = this.compressAlgo.createCompressionStream(outputBuffer, compressor, 0);
        os.write(page, 3 * Bytes.SIZEOF_INT, dataOffset - 3 * Bytes.SIZEOF_INT);
        os.flush();
        this.compressAlgo.returnCompressor(compressor);
        this.compressor = null;
        return outputBuffer.getData();
    }
}

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From source file:edu.umass.cs.reconfiguration.reconfigurationutils.ReconfigurationPacketDemultiplexer.java

@Override
public Integer getPacketType(JSONObject json) {
    if (json instanceof JSONMessenger.JSONObjectWrapper) {
        byte[] bytes = (byte[]) ((JSONMessenger.JSONObjectWrapper) json).getObj();
        if (!JSONPacket.couldBeJSON(bytes, NIOHeader.BYTES)) {
            // first 4 bytes (after 12 bytes of address) must be the type
            return ByteBuffer.wrap(bytes, NIOHeader.BYTES, Integer.BYTES).getInt();
        } else {// ww w.  j  av  a 2  s  .co  m
            // return any valid type (assuming no more chained demultiplexers)
            return PacketType.ECHO_REQUEST.getInt();
        }
    } else
        try {
            //            assert(ReconfigurationPacket.isReconfigurationPacket(json)) : json;
            return JSONPacket.getPacketType(json);
        } catch (JSONException e) {
            e.printStackTrace();
        }
    return null;
}

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