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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: 231483 $
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          } finally {
70              attributes.clear();
71          }
72      }
73  
74      public void setAttribute(String name, String prefix, String nsURI, Object value) {
75          if(value==null)
76              return;
77          if(prefix!=null && prefix.length()>0)
78              attributes.addAttribute(nsURI,name,prefix+":"+name,"CDATA",value.toString());
79          else
80              attributes.addAttribute("",name,name,"CDATA",value.toString());
81      }
82  
83      // DynaTag interface
84      //-------------------------------------------------------------------------
85      public void setAttribute(String name, Object value) throws JellyTagException {
86          // ### we'll assume that all attributes are in no namespace!
87          // ### this is severely limiting!
88          // ### - Tag attributes should allow for namespace aware
89          int index = attributes.getIndex("", name);
90          if (index >= 0) {
91              attributes.removeAttribute(index);
92          }
93          // treat null values as no attribute
94          if (value != null) {
95              attributes.addAttribute("", name, name, "CDATA", value.toString());
96          }
97      }
98  
99      // Properties
100     //-------------------------------------------------------------------------
101     public String getUri() {
102         return uri;
103     }
104 
105     public void setUri(String uri) {
106         this.uri = uri;
107     }
108 
109     public String getQName() {
110         return qname;
111     }
112 
113     public void setQName(String qname) {
114         this.qname = qname;
115         int idx = qname.indexOf(':');
116         if (idx >= 0) {
117             this.localName = qname.substring(idx + 1);
118         }
119         else {
120             this.localName = qname;
121         }
122     }
123 
124     public String getLocalName() {
125         return localName;
126     }
127 
128     public void setLocalName(String localName) {
129         this.localName = localName;
130         // FIXME This just doesn't seem right or work...
131         if (qname == null || !qname.endsWith(localName)) {
132             localName = qname;
133         }
134     }
135 }