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:au.org.ala.layers.grid.GridCacheBuilder.java

static void nextRowOfFloats(float[] row, String datatype, boolean byteOrderLSB, int ncols, RandomAccessFile raf,
        byte[] b, float noDataValue) throws IOException {
    int size = 4;
    if (datatype.charAt(0) == 'U') {
        size = 1;// w  ww.j ava 2s  . c  o m
    } else if (datatype.charAt(0) == 'B') {
        size = 1;
    } else if (datatype.charAt(0) == 'S') {
        size = 2;
    } else if (datatype.charAt(0) == 'I') {
        size = 4;
    } else if (datatype.charAt(0) == 'L') {
        size = 8;
    } else if (datatype.charAt(0) == 'F') {
        size = 4;
    } else if (datatype.charAt(0) == 'D') {
        size = 8;
    }

    raf.read(b, 0, size * ncols);
    ByteBuffer bb = ByteBuffer.wrap(b);
    if (byteOrderLSB) {
        bb.order(ByteOrder.LITTLE_ENDIAN);
    } else {
        bb.order(ByteOrder.BIG_ENDIAN);
    }

    int i;
    int length = ncols;
    if (datatype.charAt(0) == 'U') {
        for (i = 0; i < length; i++) {
            float ret = bb.get();
            if (ret < 0) {
                ret += 256;
            }
            row[i] = ret;
        }
    } else if (datatype.charAt(0) == 'B') {

        for (i = 0; i < length; i++) {
            row[i] = (float) bb.get();
        }
    } else if (datatype.charAt(0) == 'S') {
        for (i = 0; i < length; i++) {
            row[i] = (float) bb.getShort();
        }
    } else if (datatype.charAt(0) == 'I') {
        for (i = 0; i < length; i++) {
            row[i] = (float) bb.getInt();
        }
    } else if (datatype.charAt(0) == 'L') {
        for (i = 0; i < length; i++) {
            row[i] = (float) bb.getLong();
        }
    } else if (datatype.charAt(0) == 'F') {
        for (i = 0; i < length; i++) {
            row[i] = (float) bb.getFloat();
        }
    } else if (datatype.charAt(0) == 'D') {
        for (i = 0; i < length; i++) {
            row[i] = (float) bb.getDouble();
        }
    } else {
        logger.info("UNKNOWN TYPE: " + datatype);
    }

    for (i = 0; i < length; i++) {
        if (row[i] == noDataValue) {
            row[i] = Float.NaN;
        }
    }
}

From source file:loci.formats.in.KLBReader.java

private PositiveFloat readFloat32() throws IOException {
    byte[] b = new byte[4];
    in.read(b, 0, 4);/*from  w  w w .  j  av a  2  s. c om*/
    ByteBuffer bb = ByteBuffer.wrap(b).order(ByteOrder.LITTLE_ENDIAN);
    return new PositiveFloat((double) bb.getFloat());
}

From source file:org.bimserver.collada.ColladaSerializer.java

private List<String> floatBufferToStringList(ByteBuffer buffer, Format formatter) {
    // Transform the array into a list.
    List<Float> list = new ArrayList<Float>();
    while (buffer.hasRemaining())
        list.add(new Float(buffer.getFloat()));
    // Get the data as a list of String objects.
    return listToStringList(list, formatter);
}

From source file:io.github.msdk.io.mzdata.MzDataSaxHandler.java

/**
 * {@inheritDoc}//from   w w  w . j av  a2s .  c o  m
 *
 * endElement()
 */
@SuppressWarnings("null")
public void endElement(String namespaceURI, String sName, String qName) throws SAXException {

    if (canceled)
        throw new SAXException("Parsing Cancelled");

    // <spectrumInstrument>
    if (qName.equalsIgnoreCase("spectrumInstrument")) {
        spectrumInstrumentFlag = false;
    }

    // <precursor>
    if (qName.equalsIgnoreCase("precursor")) {
        precursorFlag = false;
    }

    // <spectrum>
    if (qName.equalsIgnoreCase("spectrum")) {

        spectrumInstrumentFlag = false;

        // Auto-detect whether this scan is centroided
        MsSpectrumType spectrumType = SpectrumTypeDetectionAlgorithm.detectSpectrumType(mzBuffer,
                intensityBuffer, peaksCount);

        // Create a new scan
        MsFunction msFunction = MSDKObjectBuilder.getMsFunction(msLevel);

        MsScan newScan = MSDKObjectBuilder.getMsScan(dataStore, scanNumber, msFunction);

        newScan.setDataPoints(mzBuffer, intensityBuffer, peaksCount);
        newScan.setSpectrumType(spectrumType);
        newScan.setPolarity(polarity);

        if (retentionTime != null) {
            ChromatographyInfo chromInfo = MSDKObjectBuilder.getChromatographyInfo1D(SeparationType.UNKNOWN,
                    retentionTime);
            newScan.setChromatographyInfo(chromInfo);
        }

        if (precursorMz != null) {
            IsolationInfo isolation = MSDKObjectBuilder.getIsolationInfo(Range.singleton(precursorMz), null,
                    precursorMz, precursorCharge, null);
            newScan.getIsolations().add(isolation);
        }

        // Add the scan to the file
        newRawFile.addScan(newScan);
        parsedScans++;

    }

    // <mzArrayBinary>
    if (qName.equalsIgnoreCase("mzArrayBinary")) {

        mzArrayBinaryFlag = false;

        // Allocate space for the whole array
        if (mzBuffer.length < peaksCount)
            mzBuffer = new double[peaksCount * 2];

        byte[] peakBytes = Base64.decodeBase64(charBuffer.toString().getBytes());

        ByteBuffer currentMzBytes = ByteBuffer.wrap(peakBytes);

        if (endian.equals("big")) {
            currentMzBytes = currentMzBytes.order(ByteOrder.BIG_ENDIAN);
        } else {
            currentMzBytes = currentMzBytes.order(ByteOrder.LITTLE_ENDIAN);
        }

        for (int i = 0; i < peaksCount; i++) {
            if (precision == null || precision.equals("32"))
                mzBuffer[i] = (double) currentMzBytes.getFloat();
            else
                mzBuffer[i] = currentMzBytes.getDouble();
        }

    }

    // <intenArrayBinary>
    if (qName.equalsIgnoreCase("intenArrayBinary")) {

        intenArrayBinaryFlag = false;

        // Allocate space for the whole array
        if (intensityBuffer.length < peaksCount)
            intensityBuffer = new float[peaksCount * 2];

        byte[] peakBytes = Base64.decodeBase64(charBuffer.toString().getBytes());

        ByteBuffer currentIntensityBytes = ByteBuffer.wrap(peakBytes);

        if (endian.equals("big")) {
            currentIntensityBytes = currentIntensityBytes.order(ByteOrder.BIG_ENDIAN);
        } else {
            currentIntensityBytes = currentIntensityBytes.order(ByteOrder.LITTLE_ENDIAN);
        }

        for (int i = 0; i < peaksCount; i++) {
            if (precision == null || precision.equals("32"))
                intensityBuffer[i] = currentIntensityBytes.getFloat();
            else
                intensityBuffer[i] = (float) currentIntensityBytes.getDouble();
        }
    }
}

From source file:edu.umn.cs.spatialHadoop.visualization.FrequencyMap.java

@Override
public void readFields(DataInput in) throws IOException {
    super.readFields(in);
    int length = in.readInt();
    byte[] serializedData = new byte[length];
    in.readFully(serializedData);//  ww  w  .  j a v  a  2 s.  c o  m
    ByteArrayInputStream bais = new ByteArrayInputStream(serializedData);
    GZIPInputStream gzis = new GZIPInputStream(bais);

    byte[] buffer = new byte[8];
    gzis.read(buffer);
    ByteBuffer bbuffer = ByteBuffer.wrap(buffer);
    int width = bbuffer.getInt();
    int height = bbuffer.getInt();
    // Reallocate memory only if needed
    if (width != this.getWidth() || height != this.getHeight())
        frequencies = new float[width][height];
    buffer = new byte[getHeight() * 4];
    for (int x = 0; x < getWidth(); x++) {
        int size = 0;
        while (size < buffer.length) {
            size += gzis.read(buffer, size, buffer.length - size);
        }
        bbuffer = ByteBuffer.wrap(buffer);
        for (int y = 0; y < getHeight(); y++) {
            frequencies[x][y] = bbuffer.getFloat();
        }
    }
}

From source file:org.bimserver.collada.ColladaSerializer.java

private void setGeometry(PrintWriter out, IfcProduct ifcProductObject, String material)
        throws RenderEngineException, SerializerException {
    // Mostly just skips IfcOpeningElements which one would probably not want to end up in the Collada file.
    if (ifcProductObject instanceof IfcFeatureElementSubtraction)
        return;/*from  w  w  w.java 2 s .  c  o  m*/
    //
    GeometryInfo geometryInfo = ifcProductObject.getGeometry();
    if (geometryInfo != null && geometryInfo.getTransformation() != null) {
        GeometryData geometryData = geometryInfo.getData();
        ByteBuffer indicesBuffer = ByteBuffer.wrap(geometryData.getIndices());
        indicesBuffer.order(ByteOrder.LITTLE_ENDIAN);
        // TODO: In Blender (3d modeling tool) and Three.js, normals are ignored in favor of vertex order. The incoming geometry seems to be in order 0 1 2 when it needs to be in 1 0 2. Need more test cases.
        // Failing order: (0, 1050, 2800), (0, 1050, 3100), (3580, 1050, 3100)
        // Successful order: (0, 1050, 3100), (0, 1050, 2800), (3580, 1050, 3100)
        List<Integer> list = new ArrayList<Integer>();
        while (indicesBuffer.hasRemaining())
            list.add(indicesBuffer.getInt());
        indicesBuffer.rewind();
        for (int i = 0; i < list.size(); i += 3) {
            Integer first = list.get(i);
            Integer next = list.get(i + 1);
            list.set(i, next);
            list.set(i + 1, first);
        }
        // Positions the X or the Y or the Z of (X, Y, Z).
        ByteBuffer positionsBuffer = ByteBuffer.wrap(geometryData.getVertices());
        positionsBuffer.order(ByteOrder.LITTLE_ENDIAN);
        // Do pass to find highest Z for considered objects.
        while (positionsBuffer.hasRemaining()) {
            float x = positionsBuffer.getFloat();
            float y = positionsBuffer.getFloat();
            float z = positionsBuffer.getFloat();
            // X
            if (x > highestObserved.x())
                highestObserved.x(x);
            else if (x < lowestObserved.x())
                lowestObserved.x(x);
            // Y
            if (y > highestObserved.y())
                highestObserved.y(y);
            else if (y < lowestObserved.y())
                lowestObserved.y(y);
            // Z
            if (z > highestObserved.z())
                highestObserved.z(z);
            else if (z < lowestObserved.z())
                lowestObserved.z(z);
        }
        positionsBuffer.rewind();
        //
        ByteBuffer normalsBuffer = ByteBuffer.wrap(geometryData.getNormals());
        normalsBuffer.order(ByteOrder.LITTLE_ENDIAN);
        // Create a geometry identification number in the form of: geom-320450
        long oid = ifcProductObject.getOid();
        String id = String.format("geom-%d", oid);
        // If the material doesn't exist in the converted map, add it.
        if (!converted.containsKey(material))
            converted.put(material, new HashSet<IfcProduct>());
        // Add the current IfcProduct to the appropriate entry in the material map.
        converted.get(material).add(ifcProductObject);
        // Name for geometry.
        String name = (ifcProductObject.getGlobalId() == null) ? "[NO_GUID]" : ifcProductObject.getGlobalId();
        // Counts.
        int vertexComponentsTotal = positionsBuffer.capacity() / 4,
                normalComponentsTotal = normalsBuffer.capacity() / 4;
        int verticesCount = positionsBuffer.capacity() / 12, normalsCount = normalsBuffer.capacity() / 12,
                triangleCount = indicesBuffer.capacity() / 12;
        // Vertex scalars as one long string: 4.05 2 1 55.0 34.01 2
        String stringPositionScalars = byteBufferToFloatingPointSpaceDelimitedString(positionsBuffer);
        // Normal scalars as one long string: 4.05 2 1 55.0 34.01 2
        String stringNormalScalars = byteBufferToFloatingPointSpaceDelimitedString(normalsBuffer); //doubleBufferToFloatingPointSpaceDelimitedString(flippedNormalsBuffer);
        // Vertex indices as one long string: 1 0 2 0 3 2 5 4 6
        String stringIndexScalars = listToSpaceDelimitedString(list, intFormat);
        // Write geometry block for this IfcProduct (i.e. IfcRoof, IfcSlab, etc).
        out.println(" <geometry id=\"" + id + "\" name=\"" + name + "\">");
        out.println("  <mesh>");
        out.println("   <source id=\"positions-" + oid + "\" name=\"positions-" + oid + "\">");
        out.println("    <float_array id=\"positions-array-" + oid + "\" count=\"" + vertexComponentsTotal
                + "\">" + stringPositionScalars + "</float_array>");
        out.println("    <technique_common>");
        out.println("     <accessor count=\"" + verticesCount + "\" offset=\"0\" source=\"#positions-array-"
                + oid + "\" stride=\"3\">");
        out.println("      <param name=\"X\" type=\"float\"></param>");
        out.println("      <param name=\"Y\" type=\"float\"></param>");
        out.println("      <param name=\"Z\" type=\"float\"></param>");
        out.println("     </accessor>");
        out.println("    </technique_common>");
        out.println("   </source>");
        out.println("   <source id=\"normals-" + oid + "\" name=\"normals-" + oid + "\">");
        out.println("    <float_array id=\"normals-array-" + oid + "\" count=\"" + normalComponentsTotal + "\">"
                + stringNormalScalars + "</float_array>");
        out.println("    <technique_common>");
        out.println("     <accessor count=\"" + normalsCount + "\" offset=\"0\" source=\"#normals-array-" + oid
                + "\" stride=\"3\">");
        out.println("      <param name=\"X\" type=\"float\"></param>");
        out.println("      <param name=\"Y\" type=\"float\"></param>");
        out.println("      <param name=\"Z\" type=\"float\"></param>");
        out.println("     </accessor>");
        out.println("    </technique_common>");
        out.println("   </source>");
        out.println("   <vertices id=\"vertices-" + oid + "\">");
        out.println("    <input semantic=\"POSITION\" source=\"#positions-" + oid + "\"/>");
        out.println("    <input semantic=\"NORMAL\" source=\"#normals-" + oid + "\"/>");
        out.println("   </vertices>");
        out.println("   <triangles count=\"" + triangleCount + "\" material=\"Material-" + oid + "\">");
        out.println("    <input offset=\"0\" semantic=\"VERTEX\" source=\"#vertices-" + oid + "\"/>");
        out.println("    <p>" + stringIndexScalars + "</p>");
        out.println("   </triangles>");
        out.println("  </mesh>");
        out.println(" </geometry>");
    }
}

From source file:au.org.ala.delta.intkey.model.IntkeyDatasetFileReader.java

/**
 * Read a list of floating-point values from the current pointer location in
 * the supplied binary file/*from   w  w w. ja v a2s.  co  m*/
 * 
 * @param bFile
 *            the binary (characters or taxa) file
 * @param numFloats
 *            the number of floating point values to read
 * @return the list of floating point values
 */
private static List<Float> readFloatList(BinFile bFile, int numFloats) {
    ByteBuffer bb = bFile.readByteBuffer(numFloats * Constants.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:org.wso2.carbon.analytics.data.commons.utils.AnalyticsCommonUtils.java

public static Map<String, Object> decodeRecordValues(byte[] data, Set<String> columns)
        throws AnalyticsException {
    /* using LinkedHashMap to retain the column order */
    Map<String, Object> result = new LinkedHashMap<>();
    int type, size;
    String colName;// w  w w  .  j  a va  2 s  .  co m
    Object value;
    byte[] buff;
    byte boolVal;
    byte[] binData;
    try {
        ByteBuffer buffer = ByteBuffer.wrap(data);
        while (buffer.remaining() > 0) {
            size = buffer.getInt();
            if (size == 0) {
                break;
            }
            buff = new byte[size];
            buffer.get(buff, 0, size);
            colName = new String(buff, StandardCharsets.UTF_8);
            type = buffer.get();
            switch (type) {
            case DATA_TYPE_STRING:
                size = buffer.getInt();
                buff = new byte[size];
                buffer.get(buff, 0, size);
                value = new String(buff, StandardCharsets.UTF_8);
                break;
            case DATA_TYPE_LONG:
                value = buffer.getLong();
                break;
            case DATA_TYPE_DOUBLE:
                value = buffer.getDouble();
                break;
            case DATA_TYPE_BOOLEAN:
                boolVal = buffer.get();
                if (boolVal == BOOLEAN_TRUE) {
                    value = true;
                } else if (boolVal == BOOLEAN_FALSE) {
                    value = false;
                } else {
                    throw new AnalyticsException("Invalid encoded boolean value: " + boolVal);
                }
                break;
            case DATA_TYPE_INTEGER:
                value = buffer.getInt();
                break;
            case DATA_TYPE_FLOAT:
                value = buffer.getFloat();
                break;
            case DATA_TYPE_BINARY:
                size = buffer.getInt();
                binData = new byte[size];
                buffer.get(binData);
                value = binData;
                break;
            case DATA_TYPE_OBJECT:
                size = buffer.getInt();
                binData = new byte[size];
                buffer.get(binData);
                value = deserializeObject(binData);
                break;
            case DATA_TYPE_NULL:
                value = null;
                break;
            default:
                throw new AnalyticsException("Unknown encoded data source type : " + type);
            }
            if (columns == null || columns.contains(colName)) {
                result.put(colName, value);
            }
        }
    } catch (Exception e) {
        throw new AnalyticsException("Error in decoding record values: " + e.getMessage(), e);
    }
    return result;
}

From source file:org.wso2.carbon.analytics.datasource.core.util.GenericUtils.java

public static Map<String, Object> decodeRecordValues(byte[] data, Set<String> columns)
        throws AnalyticsException {
    /* using LinkedHashMap to retain the column order */
    Map<String, Object> result = new LinkedHashMap<>();
    int type, size;
    String colName;//www .ja v  a  2  s  . c o m
    Object value;
    byte[] buff;
    byte boolVal;
    byte[] binData;
    try {
        ByteBuffer buffer = ByteBuffer.wrap(data);
        while (buffer.remaining() > 0) {
            size = buffer.getInt();
            if (size == 0) {
                break;
            }
            buff = new byte[size];
            buffer.get(buff, 0, size);
            colName = new String(buff, StandardCharsets.UTF_8);
            type = buffer.get();
            switch (type) {
            case DATA_TYPE_STRING:
                size = buffer.getInt();
                buff = new byte[size];
                buffer.get(buff, 0, size);
                value = new String(buff, StandardCharsets.UTF_8);
                break;
            case DATA_TYPE_LONG:
                value = buffer.getLong();
                break;
            case DATA_TYPE_DOUBLE:
                value = buffer.getDouble();
                break;
            case DATA_TYPE_BOOLEAN:
                boolVal = buffer.get();
                if (boolVal == BOOLEAN_TRUE) {
                    value = true;
                } else if (boolVal == BOOLEAN_FALSE) {
                    value = false;
                } else {
                    throw new AnalyticsException("Invalid encoded boolean value: " + boolVal);
                }
                break;
            case DATA_TYPE_INTEGER:
                value = buffer.getInt();
                break;
            case DATA_TYPE_FLOAT:
                value = buffer.getFloat();
                break;
            case DATA_TYPE_BINARY:
                size = buffer.getInt();
                binData = new byte[size];
                buffer.get(binData);
                value = binData;
                break;
            case DATA_TYPE_OBJECT:
                size = buffer.getInt();
                binData = new byte[size];
                buffer.get(binData);
                value = GenericUtils.deserializeObject(binData);
                break;
            case DATA_TYPE_NULL:
                value = null;
                break;
            default:
                throw new AnalyticsException("Unknown encoded data source type : " + type);
            }
            if (columns == null || columns.contains(colName)) {
                result.put(colName, value);
            }
        }
    } catch (Exception e) {
        throw new AnalyticsException("Error in decoding record values: " + e.getMessage(), e);
    }
    return result;
}

From source file:hivemall.recommend.SlimUDTF.java

private void replayTrain(@Nonnull final ByteBuffer buf) {
    final int itemI = buf.getInt();
    final int knnSize = buf.getInt();

    final Int2ObjectMap<Int2FloatMap> knnItems = new Int2ObjectOpenHashMap<>(1024);
    final IntSet pairItems = new IntOpenHashSet();
    for (int i = 0; i < knnSize; i++) {
        int user = buf.getInt();
        int ruSize = buf.getInt();
        Int2FloatMap ru = new Int2FloatOpenHashMap(ruSize);
        ru.defaultReturnValue(0.f);/* w w w .jav  a 2  s. c  o m*/

        for (int j = 0; j < ruSize; j++) {
            int itemK = buf.getInt();
            pairItems.add(itemK);
            float ruk = buf.getFloat();
            ru.put(itemK, ruk);
        }
        knnItems.put(user, ru);
    }

    for (int itemJ : pairItems) {
        train(itemI, knnItems, itemJ);
    }
}