| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package java.nio; |
| |
| /** |
| * HeapByteBuffer, ReadWriteHeapByteBuffer and ReadOnlyHeapByteBuffer compose |
| * the implementation of array based byte buffers. |
| * <p> |
| * ReadWriteHeapByteBuffer extends HeapByteBuffer with all the write methods. |
| * </p> |
| * <p> |
| * This class is marked final for runtime performance. |
| * </p> |
| * |
| */ |
| final class ReadWriteHeapByteBuffer extends HeapByteBuffer { |
| |
| static ReadWriteHeapByteBuffer copy(HeapByteBuffer other, int markOfOther) { |
| ReadWriteHeapByteBuffer buf = new ReadWriteHeapByteBuffer( |
| other.backingArray, other.capacity(), other.offset); |
| buf.limit = other.limit(); |
| buf.position = other.position(); |
| buf.mark = markOfOther; |
| buf.order(other.order()); |
| return buf; |
| } |
| |
| ReadWriteHeapByteBuffer(byte[] backingArray) { |
| super(backingArray); |
| } |
| |
| ReadWriteHeapByteBuffer(int capacity) { |
| super(capacity); |
| } |
| |
| ReadWriteHeapByteBuffer(byte[] backingArray, int capacity, int arrayOffset) { |
| super(backingArray, capacity, arrayOffset); |
| } |
| |
| @Override |
| public ByteBuffer asReadOnlyBuffer() { |
| return ReadOnlyHeapByteBuffer.copy(this, mark); |
| } |
| |
| @Override |
| public ByteBuffer compact() { |
| System.arraycopy(backingArray, position + offset, backingArray, offset, |
| remaining()); |
| position = limit - position; |
| limit = capacity; |
| mark = UNSET_MARK; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer duplicate() { |
| return copy(this, mark); |
| } |
| |
| @Override |
| public boolean isReadOnly() { |
| return false; |
| } |
| |
| @Override |
| protected byte[] protectedArray() { |
| return backingArray; |
| } |
| |
| @Override |
| protected int protectedArrayOffset() { |
| return offset; |
| } |
| |
| @Override |
| protected boolean protectedHasArray() { |
| return true; |
| } |
| |
| @Override |
| public ByteBuffer put(byte b) { |
| if (position == limit) { |
| throw new BufferOverflowException(); |
| } |
| backingArray[offset + position++] = b; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer put(int index, byte b) { |
| if (index < 0 || index >= limit) { |
| throw new IndexOutOfBoundsException(); |
| } |
| backingArray[offset + index] = b; |
| return this; |
| } |
| |
| /* |
| * Override ByteBuffer.put(byte[], int, int) to improve performance. |
| * |
| * (non-Javadoc) |
| * |
| * @see java.nio.ByteBuffer#put(byte[], int, int) |
| */ |
| @Override |
| public ByteBuffer put(byte[] src, int off, int len) { |
| if (off < 0 || len < 0 || (long) off + (long) len > src.length) { |
| throw new IndexOutOfBoundsException(); |
| } |
| if (len > remaining()) { |
| throw new BufferOverflowException(); |
| } |
| if (isReadOnly()) { |
| throw new ReadOnlyBufferException(); |
| } |
| System.arraycopy(src, off, backingArray, offset + position, len); |
| position += len; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putDouble(double value) { |
| return putLong(Double.doubleToRawLongBits(value)); |
| } |
| |
| @Override |
| public ByteBuffer putDouble(int index, double value) { |
| return putLong(index, Double.doubleToRawLongBits(value)); |
| } |
| |
| @Override |
| public ByteBuffer putFloat(float value) { |
| return putInt(Float.floatToIntBits(value)); |
| } |
| |
| @Override |
| public ByteBuffer putFloat(int index, float value) { |
| return putInt(index, Float.floatToIntBits(value)); |
| } |
| |
| @Override |
| public ByteBuffer putInt(int value) { |
| int newPosition = position + 4; |
| if (newPosition > limit) { |
| throw new BufferOverflowException(); |
| } |
| store(position, value); |
| position = newPosition; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putInt(int index, int value) { |
| if (index < 0 || (long) index + 4 > limit) { |
| throw new IndexOutOfBoundsException(); |
| } |
| store(index, value); |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putLong(int index, long value) { |
| if (index < 0 || (long) index + 8 > limit) { |
| throw new IndexOutOfBoundsException(); |
| } |
| store(index, value); |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putLong(long value) { |
| int newPosition = position + 8; |
| if (newPosition > limit) { |
| throw new BufferOverflowException(); |
| } |
| store(position, value); |
| position = newPosition; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putShort(int index, short value) { |
| if (index < 0 || (long) index + 2 > limit) { |
| throw new IndexOutOfBoundsException(); |
| } |
| store(index, value); |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer putShort(short value) { |
| int newPosition = position + 2; |
| if (newPosition > limit) { |
| throw new BufferOverflowException(); |
| } |
| store(position, value); |
| position = newPosition; |
| return this; |
| } |
| |
| @Override |
| public ByteBuffer slice() { |
| ReadWriteHeapByteBuffer slice = new ReadWriteHeapByteBuffer( |
| backingArray, remaining(), offset + position); |
| slice.order = order; |
| return slice; |
| } |
| } |