1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.filter.buffer;
21
22 import org.apache.mina.core.buffer.IoBuffer;
23 import org.apache.mina.util.LazyInitializer;
24
25 /**
26 * An {@link LazyInitializer} implementation that initializes an
27 * {@link IoBuffer} only when needed.
28 *
29 * @author The Apache MINA Project (dev@mina.apache.org)
30 * @version $Rev$, $Date$
31 * @since MINA 2.0.0-M2
32 */
33 public class IoBufferLazyInitializer extends LazyInitializer<IoBuffer> {
34
35 /**
36 * The buffer size allocated for each new session's buffer.
37 */
38 private int bufferSize;
39
40 /**
41 * Constructor which sets allocated buffer size to <code>bufferSize</code>.
42 *
43 * @param bufferSize the new buffer size
44 */
45 public IoBufferLazyInitializer(int bufferSize) {
46 this.bufferSize = bufferSize;
47 }
48
49 /**
50 * {@inheritDoc}
51 */
52 public IoBuffer init() {
53 return IoBuffer.allocate(bufferSize);
54 }
55 }