Public Methods
| final B |
buffer()
Returns the buffer backing this window.
|
| final long |
offset()
Returns the current offset of this window in the original buffer.
|
| final long |
size()
Returns the size of this buffer window.
|
| final DataBufferWindow<B> |
slide(long step)
Moves the window of
step elements in the original buffer. |
| final DataBufferWindow<B> |
slideTo(long index)
Moves the window at the given position in the original buffer.
|
Inherited Methods
Public Methods
public final B buffer ()
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());
Returns
- this window's buffer
public final long offset ()
Returns the current offset of this window in the original buffer.
public final long size ()
Returns the size of this buffer window.
public final DataBufferWindow<B> slide (long step)
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.
Parameters
| step | value to add to the current offset of this window |
|---|
Returns
- this instance
public final DataBufferWindow<B> slideTo (long index)
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 buffer() at index x will return the value at
index + x in the original buffer.
Parameters
| index | new offset for this window |
|---|
Returns
- this instance