001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.mina.filter.buffer; 021 022import org.apache.mina.core.buffer.IoBuffer; 023import org.apache.mina.util.LazyInitializer; 024 025/** 026 * An {@link LazyInitializer} implementation that initializes an 027 * {@link IoBuffer} only when needed. 028 * 029 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 030 * @since MINA 2.0.0-M2 031 */ 032public class IoBufferLazyInitializer extends LazyInitializer<IoBuffer> { 033 034 /** 035 * The buffer size allocated for each new session's buffer. 036 */ 037 private int bufferSize; 038 039 /** 040 * Constructor which sets allocated buffer size to <code>bufferSize</code>. 041 * 042 * @param bufferSize the new buffer size 043 */ 044 public IoBufferLazyInitializer(int bufferSize) { 045 this.bufferSize = bufferSize; 046 } 047 048 /** 049 * {@inheritDoc} 050 */ 051 public IoBuffer init() { 052 return IoBuffer.allocate(bufferSize); 053 } 054}