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/*
 * 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;

/**
 * Allocates {@link IoBuffer}s and manages them. Please implement this interface if you need more
 * advanced memory management scheme.
 * 
 * @author The Apache MINA Project ([email protected])
 * @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (Thu, 26 Jun 2008) $
 */
public interface IoBufferAllocator {
  /**
   * Returns the buffer which is capable of the specified size.
   * 
   * @param capacity the capacity of the buffer
   * @param direct true to get a direct buffer, false to get a heap buffer.
   */
  IoBuffer allocate(int capacity, boolean direct);

  /**
   * Returns the NIO buffer which is capable of the specified size.
   * 
   * @param capacity the capacity of the buffer
   * @param direct true to get a direct buffer, false to get a heap buffer.
   */
  ByteBuffer allocateNioBuffer(int capacity, boolean direct);

  /**
   * Wraps the specified NIO {@link ByteBuffer} into MINA buffer.
   */
  IoBuffer wrap(ByteBuffer nioBuffer);

  /**
   * Dispose of this allocator.
   */
  void dispose();
}