Source code: com/sun/facelets/tag/CompositeTagLibrary.java
1 /**
2 * Licensed under the Common Development and Distribution License,
3 * you may not use this file except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://www.sun.com/cddl/
7 *
8 * Unless required by applicable law or agreed to in writing, software
9 * distributed under the License is distributed on an "AS IS" BASIS,
10 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
11 * implied. See the License for the specific language governing
12 * permissions and limitations under the License.
13 */
14
15 package com.sun.facelets.tag;
16
17 import java.lang.reflect.Method;
18
19 import javax.faces.FacesException;
20
21 import com.sun.facelets.util.ParameterCheck;
22
23 /**
24 * A TagLibrary that is composed of 1 or more TagLibrary children. Uses the
25 * chain of responsibility pattern to stop searching as soon as one of the
26 * children handles the requested method.
27 *
28 * @author Jacob Hookom
29 * @version $Id: CompositeTagLibrary.java,v 1.3 2005/08/24 04:38:47 jhook Exp $
30 */
31 public final class CompositeTagLibrary implements TagLibrary {
32
33 private final TagLibrary[] libraries;
34
35 public CompositeTagLibrary(TagLibrary[] libraries) {
36 ParameterCheck.notNull("libraries", libraries);
37 this.libraries = libraries;
38 }
39
40 /*
41 * (non-Javadoc)
42 *
43 * @see com.sun.facelets.tag.TagLibrary#containsNamespace(java.lang.String)
44 */
45 public boolean containsNamespace(String ns) {
46 for (int i = 0; i < this.libraries.length; i++) {
47 if (this.libraries[i].containsNamespace(ns)) {
48 return true;
49 }
50 }
51 return false;
52 }
53
54 /*
55 * (non-Javadoc)
56 *
57 * @see com.sun.facelets.tag.TagLibrary#containsTagHandler(java.lang.String,
58 * java.lang.String)
59 */
60 public boolean containsTagHandler(String ns, String localName) {
61 for (int i = 0; i < this.libraries.length; i++) {
62 if (this.libraries[i].containsTagHandler(ns, localName)) {
63 return true;
64 }
65 }
66 return false;
67 }
68
69 /*
70 * (non-Javadoc)
71 *
72 * @see com.sun.facelets.tag.TagLibrary#createTagHandler(java.lang.String,
73 * java.lang.String, com.sun.facelets.tag.TagConfig)
74 */
75 public TagHandler createTagHandler(String ns, String localName,
76 TagConfig tag) throws FacesException {
77 for (int i = 0; i < this.libraries.length; i++) {
78 if (this.libraries[i].containsTagHandler(ns, localName)) {
79 return this.libraries[i].createTagHandler(ns, localName, tag);
80 }
81 }
82 return null;
83 }
84
85 /*
86 * (non-Javadoc)
87 *
88 * @see com.sun.facelets.tag.TagLibrary#containsFunction(java.lang.String,
89 * java.lang.String)
90 */
91 public boolean containsFunction(String ns, String name) {
92 for (int i = 0; i < this.libraries.length; i++) {
93 if (this.libraries[i].containsFunction(ns, name)) {
94 return true;
95 }
96 }
97 return false;
98 }
99
100 /*
101 * (non-Javadoc)
102 *
103 * @see com.sun.facelets.tag.TagLibrary#createFunction(java.lang.String,
104 * java.lang.String)
105 */
106 public Method createFunction(String ns, String name) {
107 for (int i = 0; i < this.libraries.length; i++) {
108 if (this.libraries[i].containsFunction(ns, name)) {
109 return this.libraries[i].createFunction(ns, name);
110 }
111 }
112 return null;
113 }
114 }