| /* |
| * 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 com.alibaba.dubbo.remoting.buffer; |
| |
| import java.nio.ByteBuffer; |
| |
| public class DirectChannelBufferFactory implements ChannelBufferFactory { |
| |
| private static final DirectChannelBufferFactory INSTANCE = new DirectChannelBufferFactory(); |
| |
| public DirectChannelBufferFactory() { |
| super(); |
| } |
| |
| public static ChannelBufferFactory getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public ChannelBuffer getBuffer(int capacity) { |
| if (capacity < 0) { |
| throw new IllegalArgumentException("capacity: " + capacity); |
| } |
| if (capacity == 0) { |
| return ChannelBuffers.EMPTY_BUFFER; |
| } |
| return ChannelBuffers.directBuffer(capacity); |
| } |
| |
| @Override |
| public ChannelBuffer getBuffer(byte[] array, int offset, int length) { |
| if (array == null) { |
| throw new NullPointerException("array"); |
| } |
| if (offset < 0) { |
| throw new IndexOutOfBoundsException("offset: " + offset); |
| } |
| if (length == 0) { |
| return ChannelBuffers.EMPTY_BUFFER; |
| } |
| if (offset + length > array.length) { |
| throw new IndexOutOfBoundsException("length: " + length); |
| } |
| |
| ChannelBuffer buf = getBuffer(length); |
| buf.writeBytes(array, offset, length); |
| return buf; |
| } |
| |
| @Override |
| public ChannelBuffer getBuffer(ByteBuffer nioBuffer) { |
| if (!nioBuffer.isReadOnly() && nioBuffer.isDirect()) { |
| return ChannelBuffers.wrappedBuffer(nioBuffer); |
| } |
| |
| ChannelBuffer buf = getBuffer(nioBuffer.remaining()); |
| int pos = nioBuffer.position(); |
| buf.writeBytes(nioBuffer); |
| nioBuffer.position(pos); |
| return buf; |
| } |
| |
| } |