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1   /*
2    * Copyright 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   
17  package org.apache.commons.betwixt.digester;
18  
19  import org.apache.commons.betwixt.Descriptor;
20  import org.apache.commons.digester.Rule;
21  import org.xml.sax.Attributes;
22  
23  /***
24   * Maps option tree to an option in the 
25   * {@link org.apache.commons.betwixt.Options}
26   * on the current description.
27   * @author <a href='http://jakarta.apache.org/'>Jakarta Commons Team</a>
28   * @since 0.5
29   */
30  public class OptionRule extends Rule {
31      
32      private String currentValue;
33      private String currentName;
34      
35      /***
36       * @see org.apache.commons.digester.Rule#begin(java.lang.String, java.lang.String, Attributes)
37       */
38      public void begin(String namespace, String name, Attributes attributes)
39          throws Exception {
40          currentValue = null;
41          currentName = null;
42      }
43  
44  
45  
46      /***
47       * @see org.apache.commons.digester.Rule#end(java.lang.String, java.lang.String)
48       */
49      public void end(String namespace, String name) {
50          if (currentName != null && currentValue != null) {
51              Object top = getDigester().peek();
52              if (top instanceof Descriptor) {
53                  Descriptor descriptor = (Descriptor) top;
54                  descriptor.getOptions().addOption(currentName, currentValue);
55              }
56          }
57      }
58      
59      /***
60       * Gets the rule that maps the <code>name</code> element
61       * associated with the option
62       * @return <code>Rule</code>, not null
63       */
64      public Rule getNameRule() {
65          return new Rule() {
66              public void body(String namespace, String name, String text) {
67                  currentName = text;
68              }            
69          };
70      }
71  
72      /***
73       * Gets the rule that maps the <code>value</code> element
74       * associated with the option
75       * @return <code>Rule</code>, not null
76       */
77      public Rule getValueRule() {
78          return new Rule() {
79              public void body(String namespace, String name, String text) {
80                  currentValue = text;
81              }            
82          };
83      }
84  }