Java Code Examples for java.nio.DoubleBuffer#array()

The following examples show how to use java.nio.DoubleBuffer#array() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: ChannelHelper.java From libcommon with Apache License 2.0

6 votes

/**
 * ByteChannelからdouble配列を読み込む
 * @param channel
 * @return
 * @throws IOException
 */
public static double[] readDoubleArray(@NonNull final ByteChannel channel)
	throws IOException {
	
	final int n = readInt(channel);
	final ByteBuffer buf = ByteBuffer.allocate(n * 8).order(ByteOrder.BIG_ENDIAN);
	final int readBytes = channel.read(buf);
	if (readBytes != n * 8) throw new IOException();
	buf.clear();
	final DoubleBuffer result = buf.asDoubleBuffer();
	if (result.hasArray()) {
		return result.array();
	}  else {
		final double[] b = new double[n];
		result.get(b);
		return b;
	}
}

Example 2

Source File: ThriftBmiBridge.java From OpenDA with GNU Lesser General Public License v3.0

5 votes

private static double[] bufferToDoubleArray(ByteBuffer buffer) {
	buffer.order(ByteOrder.nativeOrder());
	DoubleBuffer doubles = buffer.asDoubleBuffer();

	if (doubles.hasArray()) {
		return doubles.array();
	} else {
		double[] resultArray = new double[doubles.capacity()];
		doubles.get(resultArray);
		return resultArray;
	}
}

Example 3

Source File: StoredDoubleTimeSeries.java From powsybl-core with Mozilla Public License 2.0

5 votes

@Override
public double[] toArray() {
    DoubleBuffer buffer = DoubleBuffer.allocate(metadata.getIndex().getPointCount());
    for (int i = 0; i < metadata.getIndex().getPointCount(); i++) {
        buffer.put(i, Double.NaN);
    }
    fillBuffer(buffer, 0);
    return buffer.array();
}

Example 4

Source File: TensorUtil.java From jpmml-tensorflow with GNU Affero General Public License v3.0

5 votes

static
public double[] toDoubleArray(Tensor tensor){
	DoubleBuffer doubleBuffer = DoubleBuffer.allocate(tensor.numElements());

	tensor.writeTo(doubleBuffer);

	return doubleBuffer.array();
}

Example 5

Source File: DoublePointer.java From tapir with MIT License

5 votes

/**
 * For direct buffers, calls {@link Pointer#Pointer(Buffer)}, while for buffers
 * backed with an array, allocates enough memory for the array and copies it.
 *
 * @param buffer the Buffer to reference or copy
 * @see #put(double[])
 */
public DoublePointer(DoubleBuffer buffer) {
    super(buffer);
    if (buffer != null && buffer.hasArray()) {
        double[] array = buffer.array();
        allocateArray(array.length);
        put(array);
        position(buffer.position());
        limit(buffer.limit());
    }
}

Example 6

Source File: DoubleTensorTypeSupport.java From datacollector with Apache License 2.0

5 votes

@Override
public List<Field> createListField(Tensor<Double> tensor, DoubleBuffer doubleBuffer) {
  List<Field> fields = new ArrayList<>();
  tensor.writeTo(doubleBuffer);
  double[] doubles = doubleBuffer.array();
  for (double aDouble : doubles) {
    fields.add(Field.create(aDouble));
  }
  return fields;
}

Example 7

Source File: JTensor.java From zoltar with Apache License 2.0

4 votes

/**
 * Create a new {@link JTensor} instance by extracting data from the underlying {@link Tensor} and
 * closing it afterwards.
 */
public static JTensor create(final Tensor<?> tensor) {
  final JTensor jt;
  try {
    switch (tensor.dataType()) {
      case STRING:
        if (tensor.numDimensions() == 0) {
          final String value = new String(tensor.bytesValue(), UTF_8);
          jt =
              new AutoValue_JTensor(
                  tensor.dataType(), tensor.numDimensions(), tensor.shape(), value);
        } else {
          final int[] dimensions = toIntExact(tensor.shape());
          final Object byteArray =
              tensor.copyTo(Array.newInstance(byte[].class, toIntExact(tensor.shape())));
          jt =
              new AutoValue_JTensor(
                  tensor.dataType(),
                  tensor.numDimensions(),
                  tensor.shape(),
                  toStringArray(byteArray, tensor.numElements(), dimensions));
        }
        break;
      case INT32:
        final IntBuffer intBuf = IntBuffer.allocate(tensor.numElements());
        tensor.writeTo(intBuf);
        jt =
            new AutoValue_JTensor(
                tensor.dataType(), tensor.numDimensions(), tensor.shape(), intBuf.array());
        break;
      case INT64:
        final LongBuffer longBuf = LongBuffer.allocate(tensor.numElements());
        tensor.writeTo(longBuf);
        jt =
            new AutoValue_JTensor(
                tensor.dataType(), tensor.numDimensions(), tensor.shape(), longBuf.array());
        break;
      case FLOAT:
        final FloatBuffer floatBuf = FloatBuffer.allocate(tensor.numElements());
        tensor.writeTo(floatBuf);
        jt =
            new AutoValue_JTensor(
                tensor.dataType(), tensor.numDimensions(), tensor.shape(), floatBuf.array());
        break;
      case DOUBLE:
        final DoubleBuffer doubleBuf = DoubleBuffer.allocate(tensor.numElements());
        tensor.writeTo(doubleBuf);
        jt =
            new AutoValue_JTensor(
                tensor.dataType(), tensor.numDimensions(), tensor.shape(), doubleBuf.array());
        break;
      case BOOL:
        final boolean[] array = new boolean[tensor.numElements()];
        tensor.copyTo(array);
        jt =
            new AutoValue_JTensor(
                tensor.dataType(), tensor.numDimensions(), tensor.shape(), array);
        break;
      default:
        throw new IllegalStateException("Unsupported data type " + tensor.dataType());
    }
  } finally {
    tensor.close();
  }

  return jt;
}

Example 8

Source File: CalculatedTimeSeries.java From powsybl-core with Mozilla Public License 2.0

4 votes

@Override
public double[] toArray() {
    DoubleBuffer buffer = DoubleBuffer.allocate(metadata.getIndex().getPointCount());
    fillBuffer(buffer, 0);
    return buffer.array();
}