Example usage for java.nio FloatBuffer get

Introduction

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

Prototype

public abstract float get(int index);

Source Link

Document

Returns a float at the specified index; the position is not changed.

Usage

From source file:Main.java

public static void main(String[] args) {
    FloatBuffer floatBuffer = FloatBuffer.allocate(10);

    floatBuffer.put(0, 1.23F);//from  www  .  j  a va 2 s.co  m

    floatBuffer.rewind();

    System.out.println(floatBuffer.get(0));

}

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From source file:Main.java

public static void main(String[] args) {
    FloatBuffer floatBuffer = FloatBuffer.allocate(10);

    floatBuffer.put(0, 1.23F);/*from w  ww .  j ava 2 s  .  c  o m*/

    floatBuffer.rewind();

    float[] floatArray = new float[10];

    floatBuffer.get(floatArray);

    System.out.println(Arrays.toString(floatArray));

}

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From source file:Main.java

public static void copy(final float[] data, final FloatBuffer buf, final int fromPos, final int toPos) {
    buf.position(fromPos);// ww  w .  jav  a 2  s . c om
    buf.get(data);
    buf.position(toPos);
    buf.put(data);
}

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From source file:Main.java

/**
 * Copies floats from one position in the buffer to another.
 * /*www .  j a  v  a2s.c  o  m*/
 * @param buf
 *            the buffer to copy from/to
 * @param fromPos
 *            the starting point to copy from
 * @param toPos
 *            the starting point to copy to
 * @param length
 *            the number of floats to copy
 */
public static void copyInternal(FloatBuffer buf, int fromPos, int toPos, int length) {
    float[] data = new float[length];
    buf.position(fromPos);
    buf.get(data);
    buf.position(toPos);
    buf.put(data);
}

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From source file:Main.java

public static void copyInternal(final FloatBuffer buf, final int fromPos, final int toPos, final int length) {
    final float[] data = new float[length];
    buf.position(fromPos);/*  w  ww  . j  a va2  s  . co  m*/
    buf.get(data);
    buf.position(toPos);
    buf.put(data);
}

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From source file:Main.java

/**
 * Creates a float array from the provided {@link FloatBuffer}.
 * /*  w  ww .  j  a  v a  2 s.co  m*/
 * @param buffer {@link FloatBuffer} the data source.
 * @return float array containing the data of the buffer.
 */
public static float[] getFloatArrayFromBuffer(FloatBuffer buffer) {
    float[] array = null;
    if (buffer.hasArray()) {
        array = buffer.array();
    } else {
        buffer.rewind();
        array = new float[buffer.capacity()];
        buffer.get(array);
    }
    return array;
}

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From source file:org.apache.sysml.runtime.matrix.data.LibMatrixNative.java

public static void fromFloatBuffer(FloatBuffer buff, double[] output) {
    Arrays.parallelSetAll(output, i -> (double) buff.get(i));
}

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From source file:ubic.gemma.core.loader.expression.arrayDesign.AffyChipTypeExtractor.java

private static String parseGenericCCHeader(DataInputStream str) throws IOException {

    /*/* w ww .j  a  v a  2s  . c o m*/
     * acquisition data, intensity data etc. Usually "intensity data" for the first header.
     */
    String datatypeIdentifier = readString(str);

    AffyChipTypeExtractor.log.debug(datatypeIdentifier);

    String guid = readString(str);

    AffyChipTypeExtractor.log.debug(guid);

    // we just need to read thsee off, even if we aren't using it.
    @SuppressWarnings("unused")
    String createDate = readUnicodeString(str); // blank?
    @SuppressWarnings("unused")
    String locale = readUnicodeString(str); // e.g. en-US
    int numKeyValuePairs = readIntBigEndian(str); // e.g. 55
    String result = null;
    for (int i = 0; i < numKeyValuePairs; i++) {
        String name = readUnicodeString(str);
        byte[] value = readBytes(str);
        String type = readUnicodeString(str);
        Object v;

        switch (type) {
        case "text/x-calvin-float": {
            FloatBuffer intBuf = ByteBuffer.wrap(value).order(ByteOrder.BIG_ENDIAN).asFloatBuffer();
            float[] array = new float[intBuf.remaining()];
            intBuf.get(array);
            break;
        }
        case "text/plain":
        case "text/ascii":
            // text/ascii is undocumented, but needed.
            v = new String(value, "US-ASCII");
            String vv = new String(((String) v).getBytes(), "UTF-16").trim();

            if (name.equals("affymetrix-array-type")) {
                return vv;
            }

            break;
        case "text-x-calvin-unsigned-integer-8": {
            ShortBuffer intBuf = ByteBuffer.wrap(value).asShortBuffer();
            short[] array = new short[intBuf.remaining()];
            intBuf.get(array);

            break;
        }
        case "text/x-calvin-integer-16": {
            IntBuffer intBuf = ByteBuffer.wrap(value).order(ByteOrder.BIG_ENDIAN).asIntBuffer(); // wrong?

            int[] array = new int[intBuf.remaining()];
            intBuf.get(array);
            break;
        }
        case "text/x-calvin-integer-32": {
            IntBuffer intBuf = ByteBuffer.wrap(value).order(ByteOrder.BIG_ENDIAN).asIntBuffer();
            int[] array = new int[intBuf.remaining()];
            intBuf.get(array);

            break;
        }
        case "text/x-calvin-unsigned-integer-8": {
            ShortBuffer intBuf = ByteBuffer.wrap(value).asShortBuffer();
            short[] array = new short[intBuf.remaining()];
            intBuf.get(array);

            break;
        }
        case "text/x-calvin-unsigned-integer-16": {
            IntBuffer intBuf = ByteBuffer.wrap(value).order(ByteOrder.BIG_ENDIAN).asIntBuffer();// wrong?

            int[] array = new int[intBuf.remaining()];
            intBuf.get(array);

            break;
        }
        case "text/x-calvin-unsigned-integer-32": {
            IntBuffer intBuf = ByteBuffer.wrap(value).order(ByteOrder.BIG_ENDIAN).asIntBuffer();
            int[] array = new int[intBuf.remaining()];
            intBuf.get(array);

            break;
        }
        default:
            throw new IOException("Unknown mime type:" + type);
        }

    }

    @SuppressWarnings("unused")
    int numParentHeaders = readIntBigEndian(str);
    return result;
}

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From source file:org.mrgeo.data.raster.RasterWritable.java

private static Raster read(final byte[] rasterBytes, Writable payload) throws IOException {
    WritableRaster raster;/*from  w ww  .  j  a  va 2  s.  c  o m*/

    final ByteBuffer rasterBuffer = ByteBuffer.wrap(rasterBytes);

    @SuppressWarnings("unused")
    final int headersize = rasterBuffer.getInt(); // this isn't really used anymore...
    final int height = rasterBuffer.getInt();
    final int width = rasterBuffer.getInt();
    final int bands = rasterBuffer.getInt();
    final int datatype = rasterBuffer.getInt();
    final SampleModelType sampleModelType = SampleModelType.values()[rasterBuffer.getInt()];

    SampleModel model;
    switch (sampleModelType) {
    case BANDED:
        model = new BandedSampleModel(datatype, width, height, bands);
        break;
    case MULTIPIXELPACKED:
        throw new NotImplementedException("MultiPixelPackedSampleModel not implemented yet");
        // model = new MultiPixelPackedSampleModel(dataType, w, h, numberOfBits)
    case PIXELINTERLEAVED: {
        final int pixelStride = rasterBuffer.getInt();
        final int scanlineStride = rasterBuffer.getInt();
        final int bandcnt = rasterBuffer.getInt();
        final int[] bandOffsets = new int[bandcnt];
        for (int i = 0; i < bandcnt; i++) {
            bandOffsets[i] = rasterBuffer.getInt();
        }
        model = new PixelInterleavedSampleModel(datatype, width, height, pixelStride, scanlineStride,
                bandOffsets);
        break;
    }
    case SINGLEPIXELPACKED:
        throw new NotImplementedException("SinglePixelPackedSampleModel not implemented yet");
        // model = new SinglePixelPackedSampleModel(dataType, w, h, bitMasks);
    case COMPONENT: {
        final int pixelStride = rasterBuffer.getInt();
        final int scanlineStride = rasterBuffer.getInt();
        final int bandcnt = rasterBuffer.getInt();
        final int[] bandOffsets = new int[bandcnt];
        for (int i = 0; i < bandcnt; i++) {
            bandOffsets[i] = rasterBuffer.getInt();
        }
        model = new ComponentSampleModel(datatype, width, height, pixelStride, scanlineStride, bandOffsets);
        break;
    }
    default:
        throw new RasterWritableException("Unknown RasterSampleModel type");
    }

    // include the header size param in the count
    int startdata = rasterBuffer.position();

    // calculate the data size
    int[] samplesize = model.getSampleSize();
    int samplebytes = 0;
    for (int ss : samplesize) {
        // bits to bytes
        samplebytes += (ss / 8);
    }
    int databytes = model.getHeight() * model.getWidth() * samplebytes;

    // final ByteBuffer rasterBuffer = ByteBuffer.wrap(rasterBytes, headerbytes, databytes);
    // the corner of the raster is always 0,0
    raster = Raster.createWritableRaster(model, null);

    switch (datatype) {
    case DataBuffer.TYPE_BYTE: {
        // we can't use the byte buffer explicitly because the header info is
        // still in it...
        final byte[] bytedata = new byte[databytes];
        rasterBuffer.get(bytedata);

        raster.setDataElements(0, 0, width, height, bytedata);
        break;
    }
    case DataBuffer.TYPE_FLOAT: {
        final FloatBuffer floatbuff = rasterBuffer.asFloatBuffer();
        final float[] floatdata = new float[databytes / RasterUtils.FLOAT_BYTES];

        floatbuff.get(floatdata);

        raster.setDataElements(0, 0, width, height, floatdata);
        break;
    }
    case DataBuffer.TYPE_DOUBLE: {
        final DoubleBuffer doublebuff = rasterBuffer.asDoubleBuffer();
        final double[] doubledata = new double[databytes / RasterUtils.DOUBLE_BYTES];

        doublebuff.get(doubledata);

        raster.setDataElements(0, 0, width, height, doubledata);

        break;
    }
    case DataBuffer.TYPE_INT: {
        final IntBuffer intbuff = rasterBuffer.asIntBuffer();
        final int[] intdata = new int[databytes / RasterUtils.INT_BYTES];

        intbuff.get(intdata);

        raster.setDataElements(0, 0, width, height, intdata);

        break;
    }
    case DataBuffer.TYPE_SHORT:
    case DataBuffer.TYPE_USHORT: {
        final ShortBuffer shortbuff = rasterBuffer.asShortBuffer();
        final short[] shortdata = new short[databytes / RasterUtils.SHORT_BYTES];
        shortbuff.get(shortdata);
        raster.setDataElements(0, 0, width, height, shortdata);
        break;
    }
    default:
        throw new RasterWritableException("Error trying to read raster.  Bad raster data type");
    }

    // should we even try to extract the payload?
    if (payload != null) {
        // test to see if this is a raster with a possible payload
        final int payloadStart = startdata + databytes;
        if (rasterBytes.length > payloadStart) {
            // extract the payload
            final ByteArrayInputStream bais = new ByteArrayInputStream(rasterBytes, payloadStart,
                    rasterBytes.length - payloadStart);
            final DataInputStream dis = new DataInputStream(bais);
            payload.readFields(dis);
        }
    }
    return raster;
}

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From source file:io.anserini.embeddings.WordEmbeddingDictionary.java

public float[] getEmbeddingVector(String term) throws IOException {
    Query query = AnalyzerUtils.buildBagOfWordsQuery(FIELD_ID, analyzer, term);
    TopDocs rs = searcher.search(query, 1);
    ScoredDocuments docs = ScoredDocuments.fromTopDocs(rs, searcher);

    byte[] val = docs.documents[0].getField(FIELD_BODY).binaryValue().bytes;
    FloatBuffer floatBuffer = ByteBuffer.wrap(val).asFloatBuffer();
    float[] floatArray = new float[floatBuffer.limit()];
    floatBuffer.get(floatArray);
    return floatArray;
}

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