1 /*
2 * Copyright 1999-2002,2004 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.tags.define;
17
18 import org.apache.commons.jelly.JellyTagException;
19 import org.apache.commons.jelly.TagSupport;
20 import org.apache.commons.jelly.XMLOutput;
21
22 /***
23 * <super> tag is used to invoke a parent tag implementation, when
24 * a tag extends an existing tag
25 *
26 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a>
27 * @version $Revision: 1.5 $
28 * @see ExtendTag
29 */
30 public class SuperTag extends TagSupport {
31
32 public SuperTag() {
33 }
34
35 // Tag interface
36 //-------------------------------------------------------------------------
37 public void doTag(XMLOutput output) throws JellyTagException {
38 ExtendTag tag = (ExtendTag) findAncestorWithClass(ExtendTag.class);
39 if (tag == null) {
40 throw new JellyTagException(
41 "<define:super> must be inside a <define:extend>");
42 }
43
44 tag.getSuperScript().run(getContext(), output);
45 }
46 }
47