Class AbstractDataBufferWindow<B extends DataBuffer<?>>

java.lang.Object
org.tensorflow.ndarray.impl.buffer.AbstractDataBufferWindow<B>
All Implemented Interfaces:
DataBufferWindow<B>
public abstract class AbstractDataBufferWindow<B extends DataBuffer<?>> extends Object implements DataBufferWindow<B>

  • Constructor Details

    • AbstractDataBufferWindow

      protected AbstractDataBufferWindow(B windowBuffer, long bufferLimit)

  • Method Details

    • offset

      public final long offset()
      Description copied from interface: DataBufferWindow
      Returns the current offset of this window in the original buffer.
      Specified by:
      offset in interface DataBufferWindow<B extends DataBuffer<?>>

    • size

      public final long size()
      Description copied from interface: DataBufferWindow
      Returns the size of this buffer window.
      Specified by:
      size in interface DataBufferWindow<B extends DataBuffer<?>>

    • slideTo

      public final DataBufferWindow<B> slideTo(long index)
      Description copied from interface: DataBufferWindow
      Moves the window at the given position in the original buffer.

      The size of the window remains the same and its offset is set to index, so that accessing the value of DataBufferWindow.buffer() at index x will return the value at index + x in the original buffer.

      Specified by:
      slideTo in interface DataBufferWindow<B extends DataBuffer<?>>
      Parameters:
      index - new offset for this window
      Returns:
      this instance

    • slide

      public final DataBufferWindow<B> slide(long step)
      Description copied from interface: DataBufferWindow
      Moves the window of step elements in the original buffer.

      The size of the window remains the same and its offset is set to offset() + step. If step is positive, then the window will slide forward. If it is negative, it will slide backward.

      Specified by:
      slide in interface DataBufferWindow<B extends DataBuffer<?>>
      Parameters:
      step - value to add to the current offset of this window
      Returns:
      this instance

    • buffer

      public final B buffer()
      Description copied from interface: DataBufferWindow
      Returns the buffer backing this window.

      Each window instance has it's own buffer providing a view onto the original DataBuffer. The buffers are mutated when the window slides to different offsets. For example: 

      IntDataBuffer buffer = DataBuffers.of(0, 1, 2, 3);
DataBufferWindow<IntDataBuffer> window = buffer.window(0, 2);

IntDataBuffer windowBuffer = window.buffer();
assertEquals(0, windowBuffer.getInt(0));
assertEquals(1, windowBuffer.getInt(1));

window.slideTo(2);
assertEquals(2, windowBuffer.getInt(0));
assertEquals(3, windowBuffer.getInt(1));
assertSame(windowBuffer, window.buffer());
      Specified by:
      buffer in interface DataBufferWindow<B extends DataBuffer<?>>
      Returns:
      this window's buffer

    • offset

      protected abstract void offset(long offset)