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.Token;
31
32 /**
33 * Represents all comments...
34 *
35 * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
36 * @version $Id: ASTComment.java 517553 2007-03-13 06:09:58Z wglass $
37 */
38 public class ASTComment extends SimpleNode
39 {
40 private static final char[] ZILCH = "".toCharArray();
41
42 private char[] carr;
43
44 /**
45 * @param id
46 */
47 public ASTComment(int id)
48 {
49 super(id);
50 }
51
52 /**
53 * @param p
54 * @param id
55 */
56 public ASTComment(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 * We need to make sure we catch any of the dreaded MORE tokens.
71 * @param context
72 * @param data
73 * @return The data object.
74 */
75 public Object init(InternalContextAdapter context, Object data)
76 {
77 Token t = getFirstToken();
78
79 int loc1 = t.image.indexOf("##");
80 int loc2 = t.image.indexOf("#*");
81
82 if (loc1 == -1 && loc2 == -1)
83 {
84 carr = ZILCH;
85 }
86 else
87 {
88 carr = t.image.substring(0, (loc1 == -1) ? loc2 : loc1).toCharArray();
89 }
90
91 return data;
92 }
93
94 /**
95 * @see org.apache.velocity.runtime.parser.node.SimpleNode#render(org.apache.velocity.context.InternalContextAdapter, java.io.Writer)
96 */
97 public boolean render( InternalContextAdapter context, Writer writer)
98 throws IOException, MethodInvocationException, ParseErrorException, ResourceNotFoundException
99 {
100
101 if (context.getAllowRendering())
102 {
103 writer.write(carr);
104 }
105
106 return true;
107 }
108
109 }