Пример #1
0
  protected void read(DataInputStream s) {
    try {
      ref = new WeakReference<DataBuffer>(this, Nd4j.bufferRefQueue());
      referencing = Collections.synchronizedSet(new HashSet<String>());
      dirty = new AtomicBoolean(false);
      allocationMode = AllocationMode.valueOf(s.readUTF());
      length = s.readInt();
      Type t = Type.valueOf(s.readUTF());
      if (t == Type.DOUBLE) {
        if (allocationMode == AllocationMode.HEAP) {
          if (this.dataType() == Type.FLOAT) { // DataBuffer type
            // double -> float
            floatData = new float[length()];
          } else if (this.dataType() == Type.DOUBLE) {
            // double -> double
            doubleData = new double[length()];
          } else {
            // double -> int
            intData = new int[length()];
          }
          for (int i = 0; i < length(); i++) {
            put(i, s.readDouble());
          }
        } else {
          wrappedBuffer = ByteBuffer.allocateDirect(length() * getElementSize());
          wrappedBuffer.order(ByteOrder.nativeOrder());
          for (int i = 0; i < length(); i++) {
            put(i, s.readDouble());
          }
        }
      } else {
        if (allocationMode == AllocationMode.HEAP) {
          if (this.dataType() == Type.FLOAT) { // DataBuffer type
            // float -> float
            floatData = new float[length()];
          } else if (this.dataType() == Type.DOUBLE) {
            // float -> double
            doubleData = new double[length()];
          } else {
            // float-> int
            intData = new int[length()];
          }
          for (int i = 0; i < length(); i++) {
            put(i, s.readFloat());
          }
        } else {
          wrappedBuffer = ByteBuffer.allocateDirect(length() * getElementSize());
          wrappedBuffer.order(ByteOrder.nativeOrder());
          for (int i = 0; i < length(); i++) {
            put(i, s.readFloat());
          }
        }
      }

    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
Пример #2
0
/**
 * Base class for a data buffer handling basic byte operations among other things.
 *
 * @author Adam Gibson
 */
public abstract class BaseDataBuffer implements DataBuffer {

  protected int length;
  protected int offset;
  protected int elementSize;
  protected transient ByteBuffer wrappedBuffer;
  protected Collection<String> referencing = Collections.synchronizedSet(new HashSet<String>());
  protected transient WeakReference<DataBuffer> ref;
  protected boolean isPersist = false;
  protected AllocationMode allocationMode;
  protected double[] doubleData;
  protected int[] intData;
  protected float[] floatData;
  protected AtomicBoolean dirty = new AtomicBoolean(false);
  /**
   * @param buf
   * @param length
   */
  protected BaseDataBuffer(ByteBuf buf, int length, int offset) {
    this(buf, length);
    this.offset = offset;
  }
  /**
   * @param buf
   * @param length
   */
  protected BaseDataBuffer(ByteBuf buf, int length) {
    allocationMode = Nd4j.alloc;
    this.wrappedBuffer = buf.nioBuffer();
    this.length = length;
  }
  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(float[] data, boolean copy, int offset) {
    this(data, copy);
    this.offset = offset;
  }
  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(float[] data, boolean copy) {
    allocationMode = Nd4j.alloc;
    if (allocationMode == AllocationMode.HEAP) {
      if (copy) {
        floatData = ArrayUtil.copy(data);
      } else {
        this.floatData = data;
      }
    } else {
      wrappedBuffer = ByteBuffer.allocateDirect(4 * data.length);
      wrappedBuffer.order(ByteOrder.nativeOrder());
      FloatBuffer buffer = wrappedBuffer.asFloatBuffer();
      for (int i = 0; i < data.length; i++) {
        buffer.put(i, data[i]);
      }
    }
    length = data.length;
  }

  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(double[] data, boolean copy, int offset) {
    this(data, copy);
    this.offset = offset;
  }

  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(double[] data, boolean copy) {
    allocationMode = Nd4j.alloc;
    if (allocationMode == AllocationMode.HEAP) {
      if (copy) {
        doubleData = ArrayUtil.copy(data);
      } else {
        this.doubleData = data;
      }
    } else {
      wrappedBuffer = ByteBuffer.allocateDirect(8 * data.length);
      wrappedBuffer.order(ByteOrder.nativeOrder());
      DoubleBuffer buffer = wrappedBuffer.asDoubleBuffer();
      for (int i = 0; i < data.length; i++) {
        buffer.put(i, data[i]);
      }
    }
    length = data.length;
  }

  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(int[] data, boolean copy, int offset) {
    this(data, copy);
    this.offset = offset;
  }
  /**
   * @param data
   * @param copy
   */
  public BaseDataBuffer(int[] data, boolean copy) {
    allocationMode = Nd4j.alloc;
    if (allocationMode == AllocationMode.HEAP) {
      if (copy) intData = ArrayUtil.copy(data);
      else this.intData = data;

    } else {
      wrappedBuffer = ByteBuffer.allocateDirect(4 * data.length);
      wrappedBuffer.order(ByteOrder.nativeOrder());
      IntBuffer buffer = wrappedBuffer.asIntBuffer();
      for (int i = 0; i < data.length; i++) {
        buffer.put(i, data[i]);
      }
    }
    length = data.length;
  }

  /** @param data */
  public BaseDataBuffer(double[] data) {
    this(data, Nd4j.copyOnOps);
  }

  /** @param data */
  public BaseDataBuffer(int[] data) {
    this(data, Nd4j.copyOnOps);
  }

  /** @param data */
  public BaseDataBuffer(float[] data) {
    this(data, Nd4j.copyOnOps);
  }
  /**
   * @param length
   * @param elementSize
   */
  public BaseDataBuffer(int length, int elementSize, int offset) {
    this(length, elementSize);
    this.offset = offset;
  }

  /**
   * @param length
   * @param elementSize
   */
  public BaseDataBuffer(int length, int elementSize) {
    allocationMode = Nd4j.alloc;
    this.length = length;
    this.elementSize = elementSize;
    if (allocationMode() == AllocationMode.DIRECT) {
      // allows for creation of the nio byte buffer to be overridden
      setNioBuffer();
    } else if (dataType() == Type.DOUBLE) {
      doubleData = new double[length];
    } else if (dataType() == Type.FLOAT) {
      floatData = new float[length];
    } else if (dataType() == Type.INT) intData = new int[length];
  }
  /**
   * Create a data buffer from the given length
   *
   * @param buffer
   * @param length
   */
  public BaseDataBuffer(ByteBuffer buffer, int length, int offset) {
    this(buffer, length);
    this.offset = offset;
  }
  /**
   * Create a data buffer from the given length
   *
   * @param buffer
   * @param length
   */
  public BaseDataBuffer(ByteBuffer buffer, int length) {
    allocationMode = Nd4j.alloc;
    this.length = length;
    buffer.order(ByteOrder.nativeOrder());
    if (allocationMode() == AllocationMode.DIRECT) {
      this.wrappedBuffer = buffer;
    } else if (dataType() == Type.INT) {
      intData = new int[length];
      IntBuffer intBuffer = buffer.asIntBuffer();
      for (int i = 0; i < length; i++) {
        intData[i] = intBuffer.get(i);
      }
    } else if (dataType() == Type.DOUBLE) {
      doubleData = new double[length];
      DoubleBuffer doubleBuffer = buffer.asDoubleBuffer();
      for (int i = 0; i < length; i++) {
        doubleData[i] = doubleBuffer.get(i);
      }

    } else if (dataType() == Type.FLOAT) {
      floatData = new float[length];
      FloatBuffer floatBuffer = buffer.asFloatBuffer();
      for (int i = 0; i < length; i++) {
        floatData[i] = floatBuffer.get(i);
      }
    }
  }

  // sets the nio wrapped buffer (allows to be overridden for other use cases like cuda)
  protected void setNioBuffer() {
    wrappedBuffer = ByteBuffer.allocateDirect(elementSize * length);
    wrappedBuffer.order(ByteOrder.nativeOrder());
  }

  public BaseDataBuffer(byte[] data, int length) {
    this(Unpooled.wrappedBuffer(data), length);
  }

  @Override
  public int offset() {
    return offset;
  }

  @Override
  public AllocationMode allocationMode() {
    return allocationMode;
  }

  @Override
  public void persist() {
    isPersist = true;
  }

  @Override
  public boolean isPersist() {
    return isPersist;
  }

  @Override
  public void unPersist() {
    isPersist = false;
  }

  /**
   * Instantiate a buffer with the given length
   *
   * @param length the length of the buffer
   */
  protected BaseDataBuffer(int length) {
    this.length = length;
    allocationMode = Nd4j.alloc;
    if (length < 0) throw new IllegalArgumentException("Unable to create a buffer of length <= 0");

    ref = new WeakReference<DataBuffer>(this, Nd4j.bufferRefQueue());
    if (allocationMode == AllocationMode.HEAP) {
      if (length >= Integer.MAX_VALUE)
        throw new IllegalArgumentException(
            "Length of data buffer can not be > Integer.MAX_VALUE for heap (array based storage) allocation");
      if (dataType() == Type.DOUBLE) doubleData = new double[length];
      else if (dataType() == Type.FLOAT) floatData = new float[length];
    } else {
      if (length * getElementSize() < 0)
        throw new IllegalArgumentException(
            "Unable to create buffer of length " + length + " due to negative length specified");
      wrappedBuffer =
          ByteBuffer.allocateDirect(getElementSize() * length).order(ByteOrder.nativeOrder());
    }
  }

  @Override
  public void copyAtStride(
      DataBuffer buf, int n, int stride, int yStride, int offset, int yOffset) {
    if (dataType() == Type.FLOAT) {
      for (int i = 0; i < n; i++) {
        put(offset + i * stride, buf.getFloat(yOffset + i * yStride));
      }
    } else {
      for (int i = 0; i < n; i++) {
        put(offset + i * stride, buf.getDouble(yOffset + i * yStride));
      }
    }
  }

  @Override
  public void removeReferencing(String id) {
    referencing.remove(id);
  }

  @Override
  public Collection<String> references() {
    return referencing;
  }

  @Override
  public void addReferencing(String id) {
    referencing.add(id);
  }

  @Override
  public void assign(int[] indices, float[] data, boolean contiguous, int inc) {
    if (indices.length != data.length)
      throw new IllegalArgumentException("Indices and data length must be the same");
    if (indices.length > length())
      throw new IllegalArgumentException(
          "More elements than space to assign. This buffer is of length "
              + length()
              + " where the indices are of length "
              + data.length);
    for (int i = 0; i < indices.length; i++) {
      put(indices[i], data[i]);
    }
  }

  @Override
  public void setData(int[] data) {
    if (intData != null) this.intData = data;
    else {
      for (int i = 0; i < data.length; i++) {
        put(i, data[i]);
      }
    }
  }

  @Override
  public void setData(float[] data) {
    if (floatData != null) {
      this.floatData = data;
    } else {
      for (int i = 0; i < data.length; i++) put(i, data[i]);
    }
  }

  @Override
  public void setData(double[] data) {
    if (doubleData != null) {
      this.doubleData = data;
    } else {
      for (int i = 0; i < data.length; i++) put(i, data[i]);
    }
  }

  @Override
  public void assign(int[] indices, double[] data, boolean contiguous, int inc) {
    if (indices.length != data.length)
      throw new IllegalArgumentException("Indices and data length must be the same");
    if (indices.length > length())
      throw new IllegalArgumentException(
          "More elements than space to assign. This buffer is of length "
              + length()
              + " where the indices are of length "
              + data.length);
    for (int i = 0; i < indices.length; i += inc) {
      put(indices[i], data[i]);
    }
  }

  @Override
  public void assign(DataBuffer data) {
    if (data.length() != length())
      throw new IllegalArgumentException(
          "Unable to assign buffer of length "
              + data.length()
              + " to this buffer of length "
              + length());

    for (int i = 0; i < data.length(); i++) {
      put(i, data.getDouble(i));
    }
  }

  @Override
  public void assign(int[] indices, float[] data, boolean contiguous) {
    assign(indices, data, contiguous, 1);
  }

  @Override
  public void assign(int[] indices, double[] data, boolean contiguous) {
    assign(indices, data, contiguous, 1);
  }

  @Override
  public int length() {
    return length;
  }

  @Override
  public void assign(Number value) {
    for (int i = 0; i < length(); i++) assign(value, i);
  }

  @Override
  public double[] getDoublesAt(int offset, int length) {
    return getDoublesAt(offset, 1, length);
  }

  @Override
  public float[] getFloatsAt(int offset, int inc, int length) {
    if (offset + length > length()) length -= offset;
    float[] ret = new float[length];
    for (int i = 0; i < length; i++) {
      ret[i] = getFloat(i + offset);
    }
    return ret;
  }

  @Override
  public DataBuffer dup() {
    if (floatData != null) {
      return create(floatData);
    } else if (doubleData != null) {
      return create(doubleData);
    } else if (intData != null) {
      return create(intData);
    }

    DataBuffer ret = create(length);
    for (int i = 0; i < ret.length(); i++) ret.put(i, getDouble(i));

    return ret;
  }

  /**
   * Create with length
   *
   * @param length a databuffer of the same type as this with the given length
   * @return a data buffer with the same length and datatype as this one
   */
  protected abstract DataBuffer create(int length);

  /**
   * Create the data buffer with respect to the given byte buffer
   *
   * @param data the buffer to create
   * @return the data buffer based on the given buffer
   */
  public abstract DataBuffer create(double[] data);
  /**
   * Create the data buffer with respect to the given byte buffer
   *
   * @param data the buffer to create
   * @return the data buffer based on the given buffer
   */
  public abstract DataBuffer create(float[] data);

  /**
   * Create the data buffer with respect to the given byte buffer
   *
   * @param data the buffer to create
   * @return the data buffer based on the given buffer
   */
  public abstract DataBuffer create(int[] data);

  /**
   * Create the data buffer with respect to the given byte buffer
   *
   * @param buf the buffer to create
   * @return the data buffer based on the given buffer
   */
  public abstract DataBuffer create(ByteBuf buf, int length);

  @Override
  public double[] getDoublesAt(int offset, int inc, int length) {
    if (offset + length > length()) length -= offset;

    double[] ret = new double[length];
    for (int i = 0; i < length; i++) {
      ret[i] = getDouble(i + offset);
    }

    return ret;
  }

  @Override
  public float[] getFloatsAt(int offset, int length) {
    return getFloatsAt(offset, 1, length);
  }

  @Override
  public IComplexFloat getComplexFloat(int i) {
    return Nd4j.createFloat(getFloat(i), getFloat(i + 1));
  }

  @Override
  public IComplexDouble getComplexDouble(int i) {
    return Nd4j.createDouble(getDouble(i), getDouble(i + 1));
  }

  @Override
  public IComplexNumber getComplex(int i) {
    return dataType() == DataBuffer.Type.FLOAT ? getComplexFloat(i) : getComplexDouble(i);
  }

  @Override
  public void put(int i, IComplexNumber result) {
    put(i, result.realComponent().doubleValue());
    put(i + 1, result.imaginaryComponent().doubleValue());
  }

  @Override
  public void assign(int[] offsets, int[] strides, DataBuffer... buffers) {
    assign(offsets, strides, length(), buffers);
  }

  @Override
  public byte[] asBytes() {
    if (allocationMode == AllocationMode.HEAP) {
      ByteArrayOutputStream bos = new ByteArrayOutputStream(getElementSize() * length());
      DataOutputStream dos = new DataOutputStream(bos);

      if (dataType() == Type.DOUBLE) {
        if (doubleData == null) throw new IllegalStateException("Double array is null!");

        try {
          for (int i = 0; i < doubleData.length; i++) dos.writeDouble(doubleData[i]);
        } catch (IOException e) {
          throw new RuntimeException(e);
        }

      } else {
        if (floatData == null) throw new IllegalStateException("Double array is null!");

        try {
          for (int i = 0; i < floatData.length; i++) dos.writeFloat(floatData[i]);
        } catch (IOException e) {
          throw new RuntimeException(e);
        }
      }

      return bos.toByteArray();

    } else {
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      DataOutputStream dos = new DataOutputStream(bos);
      if (dataType() == Type.DOUBLE) {
        for (int i = 0; i < length(); i++) {
          try {
            dos.writeDouble(getDouble(i));
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      } else {
        for (int i = 0; i < length(); i++) {
          try {
            dos.writeFloat(getFloat(i));
          } catch (IOException e) {
            e.printStackTrace();
          }
        }
      }
      return bos.toByteArray();
    }
  }

  @Override
  public float[] asFloat() {
    if (allocationMode == AllocationMode.HEAP) {
      if (floatData != null) {
        return floatData;
      }
    }

    float[] ret = new float[length];
    for (int i = 0; i < length; i++) ret[i] = getFloat(i);
    return ret;
  }

  @Override
  public double[] asDouble() {
    if (allocationMode == AllocationMode.HEAP) {
      if (doubleData != null) {
        return doubleData;
      }
    }

    double[] ret = new double[length];
    for (int i = 0; i < length; i++) ret[i] = getDouble(i);
    return ret;
  }

  @Override
  public int[] asInt() {
    if (allocationMode == AllocationMode.HEAP) {
      if (intData != null) {
        return intData;
      }
    }
    return wrappedBuffer.asIntBuffer().array();
  }

  @Override
  public double getDouble(int i) {
    if (doubleData != null) {
      if (i >= doubleData.length) throw new IllegalStateException("Index out of bounds " + i);
      dirty.set(false);
      return doubleData[i];
    } else if (floatData != null) {
      if (i >= floatData.length) throw new IllegalStateException("Index out of bounds " + i);
      dirty.set(false);
      return (double) floatData[i];
    } else if (intData != null) {
      dirty.set(false);
      return (double) intData[i];
    }

    if (dataType() == Type.FLOAT) {
      dirty.set(false);
      return wrappedBuffer.asFloatBuffer().get(i);
    } else if (dataType() == Type.INT) {
      dirty.set(false);
      return wrappedBuffer.asIntBuffer().get(i);
    } else {
      dirty.set(false);
      return wrappedBuffer.asDoubleBuffer().get(i);
    }
  }

  @Override
  public float getFloat(int i) {
    if (doubleData != null) {
      if (i >= doubleData.length) throw new IllegalStateException("Index out of bounds " + i);
      dirty.set(false);
      return (float) doubleData[i];
    } else if (floatData != null) {
      if (i >= floatData.length) throw new IllegalStateException("Index out of bounds " + i);
      dirty.set(false);
      return floatData[i];
    } else if (intData != null) {
      dirty.set(false);
      return (float) intData[i];
    }

    if (dataType() == Type.DOUBLE) {
      dirty.set(false);
      return (float) wrappedBuffer.asDoubleBuffer().get(i);
    }

    dirty.getAndSet(true);
    return wrappedBuffer.asFloatBuffer().get(i);
  }

  @Override
  public Number getNumber(int i) {
    if (dataType() == Type.DOUBLE) return getDouble(i);
    else if (dataType() == Type.INT) return getInt(i);
    return getFloat(i);
  }

  @Override
  public void put(int i, float element) {
    put(i, (double) element);
  }

  @Override
  public void put(int i, double element) {
    if (i < 0 || i >= length()) throw new IllegalArgumentException("Illegal index " + i);

    if (doubleData != null) doubleData[i] = element;
    else if (floatData != null) floatData[i] = (float) element;
    else if (intData != null) intData[i] = (int) element;
    else {
      if (dataType() == Type.DOUBLE) {
        wrappedBuffer.asDoubleBuffer().put(i, element);

      } else if (dataType() == Type.INT) {
        wrappedBuffer.asIntBuffer().put(i, (int) element);
      } else {
        wrappedBuffer.asFloatBuffer().put(i, (float) element);
      }
    }

    dirty.set(true);
  }

  @Override
  public boolean dirty() {
    return dirty.get();
  }

  @Override
  public IntBuffer asNioInt() {
    if (wrappedBuffer == null) {
      return IntBuffer.wrap(intData);
    }
    return wrappedBuffer.asIntBuffer();
  }

  @Override
  public DoubleBuffer asNioDouble() {
    if (wrappedBuffer == null) {
      return DoubleBuffer.wrap(doubleData);
    }
    return wrappedBuffer.asDoubleBuffer();
  }

  @Override
  public FloatBuffer asNioFloat() {
    if (wrappedBuffer == null) {
      return FloatBuffer.wrap(floatData);
    }
    return wrappedBuffer.asFloatBuffer();
  }

  @Override
  public ByteBuffer asNio() {
    return wrappedBuffer;
  }

  @Override
  public ByteBuf asNetty() {
    if (wrappedBuffer != null) return Unpooled.wrappedBuffer(wrappedBuffer);
    else if (floatData != null) return Unpooled.copyFloat(floatData);
    else if (doubleData != null) return Unpooled.copyDouble(doubleData);
    throw new IllegalStateException("No data source defined");
  }

  @Override
  public void put(int i, int element) {
    put(i, (double) element);
  }

  @Override
  public void assign(Number value, int offset) {
    for (int i = offset; i < length(); i++) put(i, value.doubleValue());
  }

  @Override
  public void write(OutputStream dos) {
    if (dos instanceof DataOutputStream) {
      try {
        write((DataOutputStream) dos);
      } catch (IOException e) {
        e.printStackTrace();
      }
    } else {
      DataOutputStream dos2 = new DataOutputStream(dos);
      try {

        write(dos2);
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }

  @Override
  public void read(InputStream is) {
    if (is instanceof DataInputStream) {
      read((DataInputStream) is);
    } else {
      DataInputStream dis2 = new DataInputStream(is);
      read(dis2);
    }
  }

  @Override
  public void flush() {}

  @Override
  public int getInt(int ix) {
    return (int) getDouble(ix);
  }

  @Override
  public void assign(int[] offsets, int[] strides, long n, DataBuffer... buffers) {
    if (offsets.length != strides.length || strides.length != buffers.length)
      throw new IllegalArgumentException(
          "Unable to assign buffers, please specify equal lengths strides, offsets, and buffers");
    int length = 0;
    for (int i = 0; i < buffers.length; i++) length += buffers[i].length();

    int count = 0;
    for (int i = 0; i < buffers.length; i++) {
      for (int j = offsets[i]; j < buffers[i].length(); j += strides[i]) {
        put(count++, buffers[i].getDouble(j));
      }
    }

    if (count != n)
      throw new IllegalArgumentException("Strides and offsets didn't match up to length " + n);
  }

  @Override
  public void assign(DataBuffer... buffers) {
    int[] offsets = new int[buffers.length];
    int[] strides = new int[buffers.length];
    for (int i = 0; i < strides.length; i++) strides[i] = 1;
    assign(offsets, strides, buffers);
  }

  @Override
  public void destroy() {}

  @Override
  public boolean equals(Object o) {
    if (o instanceof DataBuffer) {
      DataBuffer d = (DataBuffer) o;
      if (d.length() != length()) return false;
      for (int i = 0; i < length(); i++) {
        double eps = Math.abs(getDouble(i) - d.getDouble(i));
        if (eps > Nd4j.EPS_THRESHOLD) return false;
      }
    }

    return true;
  }

  private void readObject(ObjectInputStream s) {
    doReadObject(s);
  }

  private void writeObject(java.io.ObjectOutputStream out) throws IOException {
    out.defaultWriteObject();
    write(out);
  }

  protected void doReadObject(ObjectInputStream s) {
    try {
      s.defaultReadObject();
      read(s);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  protected void read(DataInputStream s) {
    try {
      ref = new WeakReference<DataBuffer>(this, Nd4j.bufferRefQueue());
      referencing = Collections.synchronizedSet(new HashSet<String>());
      dirty = new AtomicBoolean(false);
      allocationMode = AllocationMode.valueOf(s.readUTF());
      length = s.readInt();
      Type t = Type.valueOf(s.readUTF());
      if (t == Type.DOUBLE) {
        if (allocationMode == AllocationMode.HEAP) {
          if (this.dataType() == Type.FLOAT) { // DataBuffer type
            // double -> float
            floatData = new float[length()];
          } else if (this.dataType() == Type.DOUBLE) {
            // double -> double
            doubleData = new double[length()];
          } else {
            // double -> int
            intData = new int[length()];
          }
          for (int i = 0; i < length(); i++) {
            put(i, s.readDouble());
          }
        } else {
          wrappedBuffer = ByteBuffer.allocateDirect(length() * getElementSize());
          wrappedBuffer.order(ByteOrder.nativeOrder());
          for (int i = 0; i < length(); i++) {
            put(i, s.readDouble());
          }
        }
      } else {
        if (allocationMode == AllocationMode.HEAP) {
          if (this.dataType() == Type.FLOAT) { // DataBuffer type
            // float -> float
            floatData = new float[length()];
          } else if (this.dataType() == Type.DOUBLE) {
            // float -> double
            doubleData = new double[length()];
          } else {
            // float-> int
            intData = new int[length()];
          }
          for (int i = 0; i < length(); i++) {
            put(i, s.readFloat());
          }
        } else {
          wrappedBuffer = ByteBuffer.allocateDirect(length() * getElementSize());
          wrappedBuffer.order(ByteOrder.nativeOrder());
          for (int i = 0; i < length(); i++) {
            put(i, s.readFloat());
          }
        }
      }

    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  protected void write(DataOutputStream out) throws IOException {
    out.writeUTF(allocationMode.name());
    out.writeInt(length());
    out.writeUTF(dataType().name());
    if (dataType() == Type.DOUBLE) {
      for (int i = 0; i < length(); i++) out.writeDouble(getDouble(i));
    } else {
      for (int i = 0; i < length(); i++) out.writeFloat(getFloat(i));
    }
  }

  @Override
  public Object array() {
    if (floatData != null) return floatData;
    if (doubleData != null) return doubleData;
    throw new UnsupportedOperationException();
  }

  @Override
  public String toString() {
    StringBuffer ret = new StringBuffer();
    ret.append("[");
    for (int i = 0; i < length(); i++) {
      ret.append(getNumber(i));
      if (i < length() - 1) ret.append(",");
    }
    ret.append("]");

    return ret.toString();
  }

  @Override
  public int hashCode() {
    int result = length;
    result = 31 * result + (referencing != null ? referencing.hashCode() : 0);
    result = 31 * result + (ref != null ? ref.hashCode() : 0);
    result = 31 * result + (isPersist ? 1 : 0);
    result = 31 * result + (allocationMode != null ? allocationMode.hashCode() : 0);
    return result;
  }
}