1 package org.apache.commons.digester3.xmlrules;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.commons.digester3.Rule;
23 import org.xml.sax.Attributes;
24
25 /**
26 *
27 */
28 class PatternRule
29 extends Rule
30 {
31
32 private final String attributeName;
33
34 private final PatternStack patternStack;
35
36 private String pattern;
37
38 public PatternRule( PatternStack patternStack )
39 {
40 this( "value", patternStack );
41 }
42
43 public PatternRule( String attributeName, PatternStack patternStack )
44 {
45 this.attributeName = attributeName;
46 this.patternStack = patternStack;
47 }
48
49 /**
50 * {@inheritDoc}
51 */
52 @Override
53 public void begin( String namespace, String name, Attributes attributes )
54 throws Exception
55 {
56 this.pattern = attributes.getValue( this.attributeName );
57 if ( this.pattern != null )
58 {
59 this.patternStack.push( pattern );
60 }
61 }
62
63 /**
64 * {@inheritDoc}
65 */
66 @Override
67 public void end( String namespace, String name )
68 throws Exception
69 {
70 if ( this.pattern != null )
71 {
72 this.patternStack.pop();
73 }
74 }
75
76 /**
77 * @return
78 */
79 protected String getMatchingPattern()
80 {
81 return this.patternStack.toString();
82 }
83
84 }