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 package org.apache.mina.example.haiku;
20
21 import java.util.ArrayList;
22 import java.util.List;
23
24 import org.apache.mina.core.filterchain.IoFilterAdapter;
25 import org.apache.mina.core.session.IoSession;
26
27 /**
28 * @author Apache Mina Project (dev@mina.apache.org)
29 * @version $Rev: $, $Date: $
30 */
31 public class ToHaikuIoFilter extends IoFilterAdapter {
32
33 @SuppressWarnings( { "unchecked" })
34 @Override
35 public void messageReceived(NextFilter nextFilter, IoSession session,
36 Object message) throws Exception {
37 List<String> phrases = (List<String>) session.getAttribute("phrases");
38
39 if (null == phrases) {
40 phrases = new ArrayList<String>();
41 session.setAttribute("phrases", phrases);
42 }
43
44 phrases.add((String) message);
45
46 if (phrases.size() == 3) {
47 session.removeAttribute("phrases");
48
49 super.messageReceived(nextFilter, session, new Haiku(phrases
50 .toArray(new String[3])));
51 }
52 }
53 }