View Javadoc

1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jelly.impl;
17  
18  import org.apache.commons.jelly.DynaTagSupport;
19  import org.apache.commons.jelly.JellyTagException;
20  import org.apache.commons.jelly.XMLOutput;
21  
22  import org.xml.sax.SAXException;
23  import org.xml.sax.helpers.AttributesImpl;
24  
25  /***
26   * <p><code>StaticTag</code> represents a static XML element
27   * which echos itself to XMLOutput when it is invoked.</p>
28   *
29   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
30   * @version $Revision: 1.19 $
31   */
32  
33  public class StaticTag extends DynaTagSupport {
34  
35      /*** The namespace URI */
36      private String uri;
37  
38      /*** The qualified name */
39      private String qname;
40  
41      /*** The local name */
42      private String localName;
43  
44      /*** The XML Attributes */
45      private AttributesImpl attributes = new AttributesImpl();
46  
47      public StaticTag() {
48      }
49  
50      public StaticTag(String uri, String localName, String qname) {
51          this.uri = uri;
52          this.localName = localName;
53          this.qname = qname;
54      }
55  
56      public String toString() {
57          return super.toString() + "[qname=" + qname + ";attributes=" + attributes + "]";
58      }
59  
60      // Tag interface
61      //-------------------------------------------------------------------------
62      public void doTag(XMLOutput output) throws JellyTagException {
63          try {
64              output.startElement(uri, localName, qname, attributes);
65              invokeBody(output);
66              output.endElement(uri, localName, qname);
67          } catch (SAXException e) {
68              throw new JellyTagException(e);
69          }
70      }
71  
72      // DynaTag interface
73      //-------------------------------------------------------------------------
74      public void setAttribute(String name, Object value) throws JellyTagException {
75          // ### we'll assume that all attributes are in no namespace!
76          // ### this is severely limiting!
77          // ### - Tag attributes should allow for namespace aware
78          int index = attributes.getIndex("", name);
79          if (index >= 0) {
80              attributes.removeAttribute(index);
81          }
82          // treat null values as no attribute
83          if (value != null) {
84              attributes.addAttribute("", name, name, "CDATA", value.toString());
85          }
86      }
87  
88      // Properties
89      //-------------------------------------------------------------------------
90      public String getUri() {
91          return uri;
92      }
93  
94      public void setUri(String uri) {
95          this.uri = uri;
96      }
97  
98      public String getQName() {
99          return qname;
100     }
101 
102     public void setQName(String qname) {
103         this.qname = qname;
104         int idx = qname.indexOf(':');
105         if (idx >= 0) {
106             this.localName = qname.substring(idx + 1);
107         }
108         else {
109             this.localName = qname;
110         }
111     }
112 
113     public String getLocalName() {
114         return localName;
115     }
116 
117     public void setLocalName(String localName) {
118         this.localName = localName;
119         // FIXME This just doesn't seem right or work...
120         if (qname == null || !qname.endsWith(localName)) {
121             localName = qname;
122         }
123     }
124 }