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.myfaces.view.facelets.tag;
20
21 import javax.faces.view.facelets.Tag;
22 import javax.faces.view.facelets.TagDecorator;
23
24 /**
25 *
26 * @author Leonardo Uribe
27 */
28 public class BaseMultipleTagDecorator implements TagDecorator
29 {
30 private final TagDecorator defaultTagDecorator;
31
32 private final TagDecorator compositeTagDecorator;
33
34 public BaseMultipleTagDecorator(TagDecorator defaultTagDecorator, TagDecorator normalTagDecorator)
35 {
36 this.defaultTagDecorator = defaultTagDecorator;
37 this.compositeTagDecorator = normalTagDecorator;
38 }
39
40 public Tag decorate(Tag tag)
41 {
42 // The default tag decorator is special, because a non null return value does not
43 // stop processing.
44 Tag processedTag = this.defaultTagDecorator.decorate(tag);
45 // If a not null value is returned, pass the processedTag, otherwise pass the default one.
46 return compositeTagDecorator.decorate(processedTag != null ? processedTag : tag);
47 }
48 }