1 /*
2 *
3 * ====================================================================
4 *
5 * The Apache Software License, Version 1.1
6 *
7 * Copyright (c) 1999 The Apache Software Foundation. All rights
8 * reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in
19 * the documentation and/or other materials provided with the
20 * distribution.
21 *
22 * 3. The end-user documentation included with the redistribution, if
23 * any, must include the following acknowlegement:
24 * "This product includes software developed by the
25 * Apache Software Foundation (http://www.apache.org/)."
26 * Alternately, this acknowlegement may appear in the software itself,
27 * if and wherever such third-party acknowlegements normally appear.
28 *
29 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
30 * Foundation" must not be used to endorse or promote products derived
31 * from this software without prior written permission. For written
32 * permission, please contact apache@apache.org.
33 *
34 * 5. Products derived from this software may not be called "Apache"
35 * nor may "Apache" appear in their names without prior written
36 * permission of the Apache Group.
37 *
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 * SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This software consists of voluntary contributions made by many
53 * individuals on behalf of the Apache Software Foundation. For more
54 * information on the Apache Software Foundation, please see
55 * <http://www.apache.org/>.
56 *
57 */
58
59 package org.apache.commons.jelly.tags.antlr;
60
61 import org.apache.commons.jelly.XMLOutput;
62 import org.apache.commons.jelly.TagSupport;
63 import org.apache.commons.jelly.JellyException;
64
65 public class GrammarTag extends TagSupport
66 {
67 public GrammarTag()
68 {
69 }
70
71
72 // Tag interface
73 //-------------------------------------------------------------------------
74
75 public void doTag(final XMLOutput output) throws Exception
76 {
77 String grammar = getBodyText();
78
79 AntlrTag antlr = (AntlrTag) findAncestorWithClass( AntlrTag.class );
80
81 if ( antlr == null )
82 {
83 throw new JellyException( "<grammar> should only be used within an <antlr> block." );
84 }
85
86 antlr.addGrammar( grammar );
87 }
88 }
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