View Javadoc

1   package org.apache.velocity.runtime.parser.node;
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.util.HashMap;
23  import java.util.Map;
24  
25  import org.apache.velocity.context.InternalContextAdapter;
26  import org.apache.velocity.exception.MethodInvocationException;
27  import org.apache.velocity.runtime.parser.Parser;
28  
29  /**
30   * AST Node for creating a map / dictionary.
31   *
32   * This class was originally generated from Parset.jjt.
33   *
34   * @version $Id: ASTMap.java 517553 2007-03-13 06:09:58Z wglass $
35   */
36  public class ASTMap extends SimpleNode
37  {
38      /**
39       * @param id
40       */
41      public ASTMap(int id)
42      {
43          super(id);
44      }
45  
46      /**
47       * @param p
48       * @param id
49       */
50      public ASTMap(Parser p, int id)
51      {
52          super(p, id);
53      }
54  
55      /**
56       * @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)
57       */
58      public Object jjtAccept(ParserVisitor visitor, Object data)
59      {
60          return visitor.visit(this, data);
61      }
62  
63      /**
64       * @see org.apache.velocity.runtime.parser.node.SimpleNode#value(org.apache.velocity.context.InternalContextAdapter)
65       */
66      public Object value(InternalContextAdapter context)
67          throws MethodInvocationException
68      {
69          int size = jjtGetNumChildren();
70  
71          Map objectMap = new HashMap();
72  
73          for (int i = 0; i < size; i += 2)
74          {
75              SimpleNode keyNode = (SimpleNode) jjtGetChild(i);
76              SimpleNode valueNode = (SimpleNode) jjtGetChild(i+1);
77  
78              Object key = (keyNode == null ? null : keyNode.value(context));
79              Object value = (valueNode == null ? null : valueNode.value(context));
80  
81              objectMap.put(key, value);
82          }
83  
84          return objectMap;
85      }
86  }