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.shared.context.flash;
21
22 import java.io.Serializable;
23 import java.util.Map;
24 import javax.faces.FacesWrapper;
25 import javax.faces.context.FacesContext;
26 import javax.faces.context.Flash;
27 import org.apache.myfaces.shared.util.LRULinkedHashMap;
28
29 /**
30 *
31 */
32 class ClientWindowFlashTokenLRUMap extends LRULinkedHashMap<String, String> implements Serializable
33 {
34 public ClientWindowFlashTokenLRUMap(int capacity)
35 {
36 super(capacity);
37 }
38
39 @Override
40 protected boolean removeEldestEntry(Map.Entry<String, String> eldest)
41 {
42 FacesContext facesContext = FacesContext.getCurrentInstance();
43 Flash flash = facesContext.getExternalContext().getFlash();
44 if (flash != null)
45 {
46 ReleasableFlash rf = null;
47 while (flash != null)
48 {
49 if (flash instanceof ReleasableFlash)
50 {
51 rf = (ReleasableFlash) flash;
52 break;
53 }
54 if (flash instanceof FacesWrapper)
55 {
56 flash = ((FacesWrapper<? extends Flash>) flash).getWrapped();
57 }
58 else
59 {
60 flash = null;
61 }
62 }
63 if (rf != null)
64 {
65 rf.clearFlashMap(facesContext, (String) eldest.getKey(), (String) eldest.getValue());
66 }
67 }
68
69 return super.removeEldestEntry(eldest);
70 }
71 }