Example usage for java.nio ByteBuffer getFloat

List of usage examples for java.nio ByteBuffer getFloat

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Introduction

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

Prototype

public abstract float getFloat();

Source Link

Document

Returns the float at the current position and increases the position by 4.

Usage

From source file:edu.umn.msi.tropix.proteomics.conversion.impl.ConversionUtils.java

public static double[] extractDoublesLittleEndian(final byte[] bytes, final boolean is64Bit) {
    double[] doubles;
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
    byteBuffer.order(ByteOrder.LITTLE_ENDIAN);
    if (is64Bit) {
        doubles = new double[bytes.length / 8];
        for (int i = 0; i < doubles.length; i++) {
            doubles[i] = byteBuffer.getDouble();
        }/*from   w w  w.  j a v a  2 s .  c om*/
    } else {
        doubles = new double[bytes.length / 4];
        for (int i = 0; i < doubles.length; i++) {
            doubles[i] = byteBuffer.getFloat();
        }
    }
    return doubles;
}

From source file:org.mcisb.util.math.MathUtils.java

/**
 * /* ww w. ja  v a  2s .c o  m*/
 * @param encoded
 * @param bigEndian
 * @param doublePrecision
 * @return double[]
 */
public static double[] decode(final byte[] encoded, final boolean bigEndian, final boolean doublePrecision) {
    final byte[] bytes = Base64.decode(encoded);
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
    byteBuffer = byteBuffer.order(bigEndian ? ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN);

    final int limit = byteBuffer.limit();
    double[] decoded = new double[((doublePrecision) ? limit / DOUBLE_LENGTH : limit / FLOAT_LENGTH)];
    int i = 0;

    while (byteBuffer.hasRemaining()) {
        if (doublePrecision) {
            decoded[i++] = byteBuffer.getDouble();
        } else {
            decoded[i++] = byteBuffer.getFloat();
        }
    }

    return decoded;
}

From source file:com.netflix.aegisthus.pig.AegisthusLoadCaster.java

@Override
public Float bytesToFloat(byte[] arg0) throws IOException {
    if (arg0 == null || arg0.length == 0) {
        return null;
    }//from  w ww. j a va 2  s.  c  o  m
    try {
        byte[] by = hex.decode(arg0);
        ByteBuffer bb = ByteBuffer.allocate(by.length);
        bb.put(by);
        bb.position(0);
        return bb.getFloat();
    } catch (Exception e) {
        LOG.error("failed to convert " + new String(arg0) + " to float");
        return null;
    }
}

From source file:MSUmpire.SpectrumParser.mzXMLReadUnit.java

private void ParsePeakString(ScanData scan, String peakString) throws IOException, DataFormatException {
    int offset;/*w  ww  . j  a va 2  s  .  c  o  m*/

    peakString = peakString.replaceAll("\n", "");
    byte[] decoded = Base64.decodeBase64(peakString.getBytes());

    if ("zlib".equals(scan.compressionType)) {
        decoded = ZlibUncompressBuffer(decoded);
    }
    switch (scan.precision) {
    case (32): {
        offset = 0;
        for (int i = 0; i < scan.PeaksCountString; i++) {
            byte[] mz = new byte[] { decoded[offset], decoded[offset + 1], decoded[offset + 2],
                    decoded[offset + 3] };
            byte[] intensity = new byte[] { decoded[offset + 4], decoded[offset + 5], decoded[offset + 6],
                    decoded[offset + 7] };
            ByteBuffer mzBuffer = ByteBuffer.wrap(mz);
            ByteBuffer intBuffer = ByteBuffer.wrap(intensity);
            float intensityfloat = intBuffer.getFloat();
            float mzfloat = mzBuffer.getFloat();
            if (intensityfloat > 0f) {
                scan.AddPoint(mzfloat, intensityfloat);
            }
            mz = null;
            intensity = null;
            mzBuffer.clear();
            intBuffer.clear();
            mzBuffer = null;
            intBuffer = null;
            offset += 8;
        }
        break;
    }
    case (64): {
        offset = 0;
        for (int i = 0; i < scan.PeaksCountString; i++) {
            byte[] mz = new byte[] { decoded[offset], decoded[offset + 1], decoded[offset + 2],
                    decoded[offset + 3], decoded[offset + 4], decoded[offset + 5], decoded[offset + 6],
                    decoded[offset + 7] };
            byte[] intensity = new byte[] { decoded[offset + 8], decoded[offset + 9], decoded[offset + 10],
                    decoded[offset + 11], decoded[offset + 12], decoded[offset + 13], decoded[offset + 14],
                    decoded[offset + 15] };
            ByteBuffer mzBuffer = ByteBuffer.wrap(mz);
            ByteBuffer intBuffer = ByteBuffer.wrap(intensity);
            float intensityfloat = (float) intBuffer.getDouble();
            float mzfloat = (float) mzBuffer.getDouble();
            if (intensityfloat > 0f) {
                scan.AddPoint(mzfloat, intensityfloat);
            }
            mz = null;
            intensity = null;
            mzBuffer.clear();
            intBuffer.clear();
            mzBuffer = null;
            intBuffer = null;
            offset += 16;
        }
        break;
    }
    }
    peakString = null;
    decoded = null;
}

From source file:de.unibayreuth.bayeos.goat.table.MassenTableModel.java

public boolean load(ObjektNode objekt, TimeFilter tFilter, StatusFilter sFilter) {
    try {/*ww  w  . j  a v a 2s . com*/

        Vector params = new Vector();
        params.add(objekt.getId());
        params.add(tFilter.getVector());
        params.add(sFilter.getVector());
        Vector vReturn = (Vector) xmlClient.execute("MassenTableHandler.getRows", params);
        // Rows als byte[]
        byte[] ba = (byte[]) vReturn.elementAt(1);

        statusList = new ArrayByteList(ba.length / rowLength);
        vonList = new ArrayIntList(ba.length / rowLength);
        wertList = new ArrayDoubleList(ba.length / rowLength);

        ByteBuffer b = ByteBuffer.wrap(ba);
        while (b.hasRemaining()) {
            vonList.add(b.getInt());
            wertList.add((double) b.getFloat());
            statusList.add(b.get());
        }
        vReturn = null;
        logger.debug("MassenTableModel filled with " + getRowCount() + " records.");
        return true;
    } catch (XmlRpcException e) {
        MsgBox.error(e.getMessage());
        return false;
    }
}

From source file:au.org.ala.delta.io.BinFile.java

public float readFloat() {
    ByteBuffer b = readByteBuffer(4);
    return b.getFloat();
}

From source file:indexer.DocVector.java

public DocVector(Document doc, int numDimensions, int numIntervals, boolean unused) {

    // Read the floating point number array from the index
    BytesRef bytesRef = doc.getBinaryValue(DocVector.FIELD_VEC);

    ByteBuffer buff = ByteBuffer.wrap(bytesRef.bytes);
    this.x = new float[numDimensions];
    for (int i = 0; i < x.length; i++) {
        this.x[i] = buff.getFloat();
    }//  w ww . j  a v  a 2s . co  m

    this.numDimensions = numDimensions;
    DocVector.numIntervals = numIntervals;
    this.docName = doc.get(DocVector.FIELD_ID);
}

From source file:au.org.ala.delta.io.BinaryKeyFile.java

public List<Float> readFloatList(int recordNum, int numFloats) {
    seek(recordOffset(recordNum));// w ww  .java2 s  . c  o m
    ByteBuffer bb = readByteBuffer(numFloats * SIZE_INT_IN_BYTES);

    List<Float> retList = new ArrayList<Float>();
    for (int i = 0; i < numFloats; i++) {
        retList.add(bb.getFloat());
    }

    return retList;
}

From source file:indexer.DocVector.java

public DocVector(Document doc, int numDimensions, int numIntervals) {

    // Read the floating point number array from the index
    BytesRef bytesRef = doc.getBinaryValue(DocVector.FIELD_VEC);

    ByteBuffer buff = ByteBuffer.wrap(bytesRef.bytes);
    this.x = new float[numDimensions];
    for (int i = 0; i < x.length; i++) {
        this.x[i] = buff.getFloat();
    }//  w ww.j av  a2 s.co  m

    /*
    // Read the cell descriptors from the index
    String[] cellIds = doc.get(FIELD_CELL_ID).split("\\s+");
    keys = new Cell[numDimensions];
    for (int i=0; i < keys.length; i++) {
    keys[i] = new Cell(cellIds[i]);
    }
    */

    this.numDimensions = numDimensions;
    DocVector.numIntervals = numIntervals;
    this.docName = doc.get(DocVector.FIELD_ID);

    quantized = quantize();
}

From source file:indexer.DocVector.java

public DocVector(Document doc, int numDimensions, int numIntervals, SplitCells splitCells) {

    // Read the floating point number array from the index
    BytesRef bytesRef = doc.getBinaryValue(DocVector.FIELD_VEC);

    ByteBuffer buff = ByteBuffer.wrap(bytesRef.bytes);
    this.x = new float[numDimensions];
    for (int i = 0; i < x.length; i++) {
        this.x[i] = buff.getFloat();
    }/*from  w  ww .  j ava2s. c o  m*/

    // Read the cell descriptors from the index
    String[] cellIds = doc.get(FIELD_CELL_ID).split("\\s+");
    keys = new Cell[numDimensions];
    for (int i = 0; i < keys.length; i++) {
        keys[i] = new Cell(cellIds[i]);
    }

    this.numDimensions = numDimensions;
    DocVector.numIntervals = numIntervals;
    this.docName = doc.get(DocVector.FIELD_ID);

    if (splitCells == null)
        quantized = quantize();
    else
        quantized = quantizeWithSplitCells(splitCells);
}