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package org.glassfish.grizzly.http.io;
import java.util.Arrays;
import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.memory.Buffers;
import org.glassfish.grizzly.memory.HeapBuffer;
import org.glassfish.grizzly.memory.MemoryManager;
/**
* {@link HeapBuffer} implementation, which might be reset to reference another
* byte[] at any moment.
*
* @author Alexey Stashok
*/
final class TemporaryHeapBuffer extends HeapBuffer {
boolean isDisposed;
boolean hasClonedArray;
/**
* Reset the byte[] this Buffer wraps.
*/
void reset(final byte[] heap, final int offset, final int len) {
this.heap = heap;
this.offset = offset;
this.cap = len;
this.lim = len;
this.pos = 0;
byteBuffer = null;
isDisposed = false;
hasClonedArray = false;
}
Buffer cloneContent(final MemoryManager memoryManager) {
final Buffer buffer;
final int length = remaining();
if (!hasClonedArray) {
buffer = memoryManager.allocate(length);
buffer.put(heap, offset + pos, length);
buffer.flip();
} else {
buffer = Buffers.wrap(memoryManager, heap, offset + pos, length);
}
buffer.allowBufferDispose(true);
dispose();
return buffer;
}
@Override
protected void onShareHeap() {
if (!hasClonedArray) {
heap = Arrays.copyOfRange(heap, offset, offset + cap);
offset = 0;
hasClonedArray = true;
}
super.onShareHeap();
}
@Override
public void dispose() {
isDisposed = true;
super.dispose();
}
boolean isDisposed() {
return isDisposed;
}
public void recycle() {
reset(null, 0, 0);
}
}