com.google.code.yanf4j.buffer.SimpleBufferAllocator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of xmemcached Show documentation
Extreme performance modern memcached client for java
There is a newer version: 2.4.8
/*
 * 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.google.code.yanf4j.buffer;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

/**
 * A simplistic {@link IoBufferAllocator} which simply allocates a new buffer every time.
 * 
 * @author The Apache MINA Project ([email protected])
 * @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (Thu, 26 Jun 2008) $
 */
public class SimpleBufferAllocator implements IoBufferAllocator {

  public IoBuffer allocate(int capacity, boolean direct) {
    return wrap(allocateNioBuffer(capacity, direct));
  }

  public ByteBuffer allocateNioBuffer(int capacity, boolean direct) {
    ByteBuffer nioBuffer;
    if (direct) {
      nioBuffer = ByteBuffer.allocateDirect(capacity);
    } else {
      nioBuffer = ByteBuffer.allocate(capacity);
    }
    return nioBuffer;
  }

  public IoBuffer wrap(ByteBuffer nioBuffer) {
    return new SimpleBuffer(nioBuffer);
  }

  public void dispose() {}

  private class SimpleBuffer extends AbstractIoBuffer {
    private ByteBuffer buf;

    protected SimpleBuffer(ByteBuffer buf) {
      super(SimpleBufferAllocator.this, buf.capacity());
      this.buf = buf;
      buf.order(ByteOrder.BIG_ENDIAN);
    }

    protected SimpleBuffer(SimpleBuffer parent, ByteBuffer buf) {
      super(parent);
      this.buf = buf;
    }

    @Override
    public ByteBuffer buf() {
      return buf;
    }

    @Override
    protected void buf(ByteBuffer buf) {
      this.buf = buf;
    }

    @Override
    protected IoBuffer duplicate0() {
      return new SimpleBuffer(this, this.buf.duplicate());
    }

    @Override
    protected IoBuffer slice0() {
      return new SimpleBuffer(this, this.buf.slice());
    }

    @Override
    protected IoBuffer asReadOnlyBuffer0() {
      return new SimpleBuffer(this, this.buf.asReadOnlyBuffer());
    }

    @Override
    public byte[] array() {
      return buf.array();
    }

    @Override
    public int arrayOffset() {
      return buf.arrayOffset();
    }

    @Override
    public boolean hasArray() {
      return buf.hasArray();
    }

    @Override
    public void free() {}
  }
}