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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.io.IOException;
23  import java.io.Writer;
24  
25  import org.apache.velocity.context.InternalContextAdapter;
26  import org.apache.velocity.runtime.parser.Parser;
27  
28  /**
29   * This class is responsible for handling Escapes
30   *  in VTL.
31   *
32   * Please look at the Parser.jjt file which is
33   * what controls the generation of this class.
34   *
35   * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
36   * @version $Id: ASTEscape.java 731266 2009-01-04 15:11:20Z byron $
37   */
38  public class ASTEscape extends SimpleNode
39  {
40      /** Used by the parser */
41      public String val;
42      private char[] ctext;
43  
44      /**
45       * @param id
46       */
47      public ASTEscape(int id)
48      {
49          super(id);
50      }
51  
52      /**
53       * @param p
54       * @param id
55       */
56      public ASTEscape(Parser p, int id)
57      {
58          super(p, id);
59      }
60  
61      /**
62       * @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)
63       */
64      public Object jjtAccept(ParserVisitor visitor, Object data)
65      {
66          return visitor.visit(this, data);
67      }
68  
69      /**
70       * @see org.apache.velocity.runtime.parser.node.SimpleNode#init(org.apache.velocity.context.InternalContextAdapter, java.lang.Object)
71       */
72      public Object init( InternalContextAdapter context, Object data)
73      {
74          ctext =  val.toCharArray();
75          return data;
76      }
77  
78      /**
79       * @see org.apache.velocity.runtime.parser.node.SimpleNode#render(org.apache.velocity.context.InternalContextAdapter, java.io.Writer)
80       */
81      public boolean render( InternalContextAdapter context, Writer writer)
82          throws IOException
83      {
84          writer.write(ctext);
85          return true;
86      }
87  }