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.myfaces.portlet;
21
22 import java.io.Serializable;
23 import java.util.Enumeration;
24 import java.util.HashMap;
25 import java.util.Iterator;
26 import java.util.Map;
27 import javax.portlet.ActionRequest;
28 import javax.portlet.RenderRequest;
29
30 /**
31 * This class saves the request attributes at the end of processAction.
32 *
33 * The attributes saved will be restored at the beginning of each render or
34 * until the session times out. Some portlet containers don't do this
35 * automatically, so it is done here.
36 *
37 * @author Stan Silvert
38 */
39 public class SavedRequestAttributes implements Serializable
40 {
41 private Map reqAttribs;
42
43 /** Creates a new instance of SavedRequestAttributes */
44 public SavedRequestAttributes()
45 {
46 }
47
48 public synchronized void saveRequestAttributes(ActionRequest request)
49 {
50 this.reqAttribs = new HashMap();
51 for (Enumeration i = request.getAttributeNames(); i.hasMoreElements();)
52 {
53 String name = (String)i.nextElement();
54 reqAttribs.put(name, request.getAttribute(name));
55 }
56 }
57
58 public synchronized void resotreRequestAttributes(RenderRequest request)
59 {
60 for (Iterator i = this.reqAttribs.keySet().iterator(); i.hasNext();)
61 {
62 String name = (String)i.next();
63 Object attrib = request.getAttribute(name);
64
65 // if somebody already set this attribute, don't overwrite
66 if (attrib == null)
67 {
68 request.setAttribute(name, this.reqAttribs.get(name));
69 }
70 }
71 }
72 }