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1   package org.apache.dvsl.directive;
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 java.io.Writer;
23  import java.io.IOException;
24  
25  import org.apache.velocity.context.InternalContextAdapter;
26  import org.apache.velocity.runtime.parser.node.Node;
27  import org.apache.velocity.runtime.parser.node.SimpleNode;
28  import org.apache.velocity.runtime.directive.Directive;
29  import org.apache.velocity.runtime.parser.ParserTreeConstants;
30  import org.apache.velocity.runtime.RuntimeServices;
31  
32  import org.apache.dvsl.TemplateHandler;
33  
34  /**
35   *  Velocity Directive to handle template registration of
36   *  match declarations (like the XSLT match=)
37   *
38   *  @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
39   */
40  public class MatchDirective extends Directive
41  {
42      public String getName()
43      {
44          return "match";
45      }
46  
47      public int getType()
48      {
49          return BLOCK;
50      }
51  
52      public boolean render( InternalContextAdapter context,
53                             Writer writer, Node node)
54          throws IOException
55      {
56  
57          /*
58           *  what is our arg?
59           */
60  
61          Node n = (SimpleNode) node.jjtGetChild(0);
62  
63          if ( n.getType() ==  ParserTreeConstants.JJTSTRINGLITERAL)
64          {
65              try
66              {
67                  String element =(String)((SimpleNode) node.jjtGetChild(0)).value( context );
68                  TemplateHandler th = (TemplateHandler) rsvc.getApplicationAttribute("org.apache.dvsl.TemplateHandler");
69  
70                  th.registerMatch( element, (SimpleNode) node.jjtGetChild( node.jjtGetNumChildren() - 1 ) );
71              }
72              catch( Exception ee )
73                  {}
74  
75          }
76  
77          return true;
78      }
79  }