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.exception.MethodInvocationException;
27 import org.apache.velocity.exception.ParseErrorException;
28 import org.apache.velocity.exception.ResourceNotFoundException;
29 import org.apache.velocity.runtime.parser.Parser;
30 import org.apache.velocity.runtime.parser.ParserVisitor;
31 import org.apache.velocity.runtime.parser.Token;
32
33 /**
34 * Represents all comments...
35 *
36 * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
37 * @version $Id: ASTComment.java 471381 2006-11-05 08:56:58Z wglass $
38 */
39 public class ASTComment extends SimpleNode
40 {
41 private static final char[] ZILCH = "".toCharArray();
42
43 private char[] carr;
44
45 /**
46 * @param id
47 */
48 public ASTComment(int id)
49 {
50 super(id);
51 }
52
53 /**
54 * @param p
55 * @param id
56 */
57 public ASTComment(Parser p, int id)
58 {
59 super(p, id);
60 }
61
62 /**
63 * @see org.apache.velocity.runtime.parser.node.SimpleNode#jjtAccept(org.apache.velocity.runtime.parser.ParserVisitor, java.lang.Object)
64 */
65 public Object jjtAccept(ParserVisitor visitor, Object data)
66 {
67 return visitor.visit(this, data);
68 }
69
70 /**
71 * We need to make sure we catch any of the dreaded MORE tokens.
72 * @param context
73 * @param data
74 * @return The data object.
75 */
76 public Object init(InternalContextAdapter context, Object data)
77 {
78 Token t = getFirstToken();
79
80 int loc1 = t.image.indexOf("##");
81 int loc2 = t.image.indexOf("#*");
82
83 if (loc1 == -1 && loc2 == -1)
84 {
85 carr = ZILCH;
86 }
87 else
88 {
89 carr = t.image.substring(0, (loc1 == -1) ? loc2 : loc1).toCharArray();
90 }
91
92 return data;
93 }
94
95 /**
96 * @see org.apache.velocity.runtime.parser.node.SimpleNode#render(org.apache.velocity.context.InternalContextAdapter, java.io.Writer)
97 */
98 public boolean render( InternalContextAdapter context, Writer writer)
99 throws IOException, MethodInvocationException, ParseErrorException, ResourceNotFoundException
100 {
101
102 if (context.getAllowRendering())
103 {
104 writer.write(carr);
105 }
106
107 return true;
108 }
109
110 }