Example usage for java.nio ByteBuffer getDouble

Introduction

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

Prototype

public abstract double getDouble();

Source Link

Document

Returns the double at the current position and increases the position by 8.

Usage

From source file:ConversionUtil.java

public static double convertToDouble(byte[] array) {
    ByteBuffer buffer = ByteBuffer.wrap(array);
    return buffer.getDouble();
    /*//from w w  w. ja v a 2 s . c om
    long longValue = convertToLong(array);
    return Double.longBitsToDouble(longValue);
     */
}

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From source file:com.act.lcms.MzMLParser.java

protected static List<Double> base64ToDoubleList(String b64) {
    byte[] decodedBytes = Base64.getDecoder().decode(b64);
    ByteBuffer buf = ByteBuffer.wrap(decodedBytes).order(ByteOrder.LITTLE_ENDIAN);
    List<Double> values = new ArrayList<>(decodedBytes.length / 8);
    while (buf.hasRemaining()) {
        values.add(buf.getDouble());
    }//w ww . jav  a 2 s. c  o m
    return values;
}

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From source file:org.opensha.commons.util.XMLUtils.java

public static double[] doubleArrayFromXML(Element doubleArrayEl) {
    byte[] data = byteArrayFromXML(doubleArrayEl);

    Preconditions.checkState(data.length % 8 == 0, "binary data not a multiple of 8 bits");
    int size = data.length / 8;

    ByteBuffer buf = ByteBuffer.wrap(data);
    double[] array = new double[size];
    for (int i = 0; i < size; i++)
        array[i] = buf.getDouble();

    return array;
}

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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 ww  .java2s.  c o  m
    } else {
        doubles = new double[bytes.length / 4];
        for (int i = 0; i < doubles.length; i++) {
            doubles[i] = byteBuffer.getFloat();
        }
    }
    return doubles;
}

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From source file:au.org.ala.layers.grid.GridCacheBuilder.java

static public float getNextValue(RandomAccessFile raf, Grid g) {
    float f = Float.NaN;
    try {//from w  ww  .ja  va  2  s .  c  o  m
        int size;
        byte[] b;
        if (g.datatype.charAt(0) == 'B') {//"BYTE")) {
            f = raf.readByte();
        } else if (g.datatype.charAt(0) == 'U') {//equalsIgnoreCase("UBYTE")) {
            f = raf.readByte();
            if (f < 0) {
                f += 256;
            }
        } else if (g.datatype.charAt(0) == 'S') {//equalsIgnoreCase("SHORT")) {
            size = 2;
            b = new byte[size];
            raf.read(b);
            if (g.byteorderLSB) {
                f = (short) (((0xFF & b[1]) << 8) | (b[0] & 0xFF));
            } else {
                f = (short) (((0xFF & b[0]) << 8) | (b[1] & 0xFF));
            }
        } else if (g.datatype.charAt(0) == 'I') {//equalsIgnoreCase("INT")) {
            size = 4;
            b = new byte[size];
            raf.read(b);
            if (g.byteorderLSB) {
                f = ((0xFF & b[3]) << 24) | ((0xFF & b[2]) << 16) + ((0xFF & b[1]) << 8) + (b[0] & 0xFF);
            } else {
                f = ((0xFF & b[0]) << 24)
                        | ((0xFF & b[1]) << 16) + ((0xFF & b[2]) << 8) + ((0xFF & b[3]) & 0xFF);
            }
        } else if (g.datatype.charAt(0) == 'L') {//equalsIgnoreCase("LONG")) {
            size = 8;
            b = new byte[size];
            raf.read(b);
            if (g.byteorderLSB) {
                f = ((long) (0xFF & b[7]) << 56) + ((long) (0xFF & b[6]) << 48) + ((long) (0xFF & b[5]) << 40)
                        + ((long) (0xFF & b[4]) << 32) + ((long) (0xFF & b[3]) << 24)
                        + ((long) (0xFF & b[2]) << 16) + ((long) (0xFF & b[1]) << 8) + (0xFF & b[0]);
            } else {
                f = ((long) (0xFF & b[0]) << 56) + ((long) (0xFF & b[1]) << 48) + ((long) (0xFF & b[2]) << 40)
                        + ((long) (0xFF & b[3]) << 32) + ((long) (0xFF & b[4]) << 24)
                        + ((long) (0xFF & b[5]) << 16) + ((long) (0xFF & b[6]) << 8) + (0xFF & b[7]);
            }
        } else if (g.datatype.charAt(0) == 'F') {//.equalsIgnoreCase("FLOAT")) {
            size = 4;
            b = new byte[size];
            raf.read(b);
            ByteBuffer bb = ByteBuffer.wrap(b);
            if (g.byteorderLSB) {
                bb.order(ByteOrder.LITTLE_ENDIAN);
            }
            f = bb.getFloat();

        } else if (g.datatype.charAt(0) == 'D') {//.equalsIgnoreCase("DOUBLE")) {
            size = 8;
            b = new byte[8];
            raf.read(b);
            ByteBuffer bb = ByteBuffer.wrap(b);
            if (g.byteorderLSB) {
                bb.order(ByteOrder.LITTLE_ENDIAN);
            }
            f = (float) bb.getDouble();
        }
        //replace not a number            
        if ((float) f == (float) g.nodatavalue) {
            f = Float.NaN;
        }
    } catch (Exception e) {
    }
    return f;
}

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

/**
 * //from  w  ww. j av  a 2  s. co 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;
}

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

@Override
public Double bytesToDouble(byte[] arg0) throws IOException {
    if (arg0 == null || arg0.length == 0) {
        return null;
    }// ww  w  .  j  av a2 s. co m
    try {
        byte[] by = hex.decode(arg0);
        ByteBuffer bb = ByteBuffer.allocate(by.length);
        bb.put(by);
        bb.position(0);
        return bb.getDouble();
    } catch (Exception e) {
        LOG.error("failed to convert " + new String(arg0) + " to double");
        return null;
    }
}

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From source file:edu.umn.cs.spatialHadoop.indexing.BTRPartitioner.java

@Override
public void readFields(DataInput in) throws IOException {
    mbr.readFields(in);/*  www  .j  a va  2  s .c o m*/
    columns = in.readInt();
    rows = in.readInt();
    xSplits = new double[columns];
    ySplits = new double[columns * rows];

    int bufferLength = (xSplits.length + ySplits.length) * 8;
    byte[] buffer = new byte[bufferLength];
    in.readFully(buffer);
    ByteBuffer bbuffer = ByteBuffer.wrap(buffer);
    for (int i = 0; i < xSplits.length; i++)
        xSplits[i] = bbuffer.getDouble();
    for (int i = 0; i < ySplits.length; i++)
        ySplits[i] = bbuffer.getDouble();
    if (bbuffer.hasRemaining())
        throw new RuntimeException("Error reading STR partitioner");
}

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From source file:hivemall.GeneralLearnerBaseUDTF.java

@Nonnull
private static FeatureValue readFeatureValue(@Nonnull final ByteBuffer buf,
        @Nonnull final FeatureType featureType) {
    final String featureStr = NIOUtils.getString(buf);
    final Object feature;
    switch (featureType) {
    case STRING:// www . j a va  2 s  .c  o  m
        feature = featureStr;
        break;
    case INT:
        feature = Integer.valueOf(featureStr);
        break;
    case LONG:
        feature = Long.valueOf(featureStr);
        break;
    default:
        throw new IllegalStateException(
                "Unexpected feature type " + featureType + " for feature: " + featureStr);
    }
    double value = buf.getDouble();
    return new FeatureValue(feature, value);
}

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From source file:au.org.ala.spatial.util.RecordsSmall.java

private double[] getAllDouble(String file) throws Exception {
    File f = new File(file);

    int size = (int) f.length() / 8;
    double[] all = new double[size];

    byte[] e = FileUtils.readFileToByteArray(f);

    ByteBuffer bb = ByteBuffer.wrap(e);

    for (int i = 0; i < size; i++) {
        all[i] = bb.getDouble();
    }//from  www.  ja v  a  2 s  .c o  m

    return all;
}

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