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Java > Open Source Codes > org > apache > commons > jelly > xpath > XPathTagSupport


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.xpath;
17
18 import org.apache.commons.jelly.TagSupport;
19
20 /** An abstract base class useful for implementation inheritence
21   *
22   * @author <a HREF="mailto:jstrachan@apache.org">James Strachan</a>
23   * @version $Revision: 155420 $
24   */
25 public abstract class XPathTagSupport extends TagSupport {
26
27     // Implementation methods
28 //-------------------------------------------------------------------------
29 protected Object JavaDoc getXPathContext() {
30         XPathSource tag = (XPathSource) findAncestorWithClass( XPathSource.class );
31         if ( tag != null ) {
32             return tag.getXPathSource();
33         }
34         return null;
35     }
36 }
37
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