1 /*
2 * $Id$
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 package org.apache.struts.webapp.example2;
23
24
25 import org.slf4j.Logger;
26 import org.slf4j.LoggerFactory;
27
28 import jakarta.faces.application.ViewHandler;
29 import jakarta.faces.application.ViewHandlerWrapper;
30 import jakarta.faces.context.FacesContext;
31
32
33 /**
34 * Custom {@code ViewHandler} implementation that adds features
35 * specific to the Struts-Faces Integration Library. It leverages the
36 * "decorator pattern" customization strategy that JSF supports, by
37 * delegating most processing to the {@code ViewHandler} instance
38 * handed to our constructor.
39 */
40 public class ViewHandlerImpl extends ViewHandlerWrapper {
41
42
43 // -------------------------------------------------------- Static Variables
44
45
46 /**
47 * The {@code Log} instance for this class.
48 */
49 private final static Logger LOG =
50 LoggerFactory.getLogger(ViewHandlerImpl.class);
51
52
53 // ------------------------------------------------------------ Constructors
54
55
56 /**
57 * Construct a {@code ViewHandlerImpl} decorating the
58 * specified {@code ViewHandler} instance.
59 *
60 * @param oldViewHandler {@code ViewHandler} to be decorated
61 */
62 public ViewHandlerImpl(ViewHandler oldViewHandler) {
63 super(oldViewHandler);
64 LOG.debug("Creating ViewHandler instance, wrapping handler {}",
65 oldViewHandler);
66 }
67
68
69 // ----------------------------------------------------- Specialized Methods
70
71
72 /**
73 * Replace extension {@code .jsp} with {@code .faces}.
74 */
75 public String getActionURL(FacesContext context, String viewId) {
76 String ret = super.getActionURL(context, viewId);
77 int i = 0;
78 if (ret.endsWith(".do")) {
79 i = 3;
80 } else if (ret.endsWith(".jsp")) {
81 i = 4;
82 }
83 if (i > 0) {
84 ret = ret.substring(0, ret.length() - i) + ".faces";
85 }
86 return ret;
87 }
88 }