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Java > Open Source Codes > org > netbeans > modules > lexer > gen > javacc > JavaCCLanguageGenerator


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.lexer.gen.javacc;
21
22 import java.io.File JavaDoc;
23 import java.io.IOException JavaDoc;
24 import org.netbeans.modules.lexer.gen.DescriptionReader;
25 import org.netbeans.modules.lexer.gen.LanguageGenerator;
26 import org.netbeans.modules.lexer.gen.LanguageData;
27 import org.netbeans.modules.lexer.gen.util.LexerGenUtilities;
28 import org.xml.sax.SAXException JavaDoc;
29
30 /**
31  * Language class generator for javacc generated lexers.
32  *
33  * @author Miloslav Metelka
34  * @version 1.00
35  */
36
37 public class JavaCCLanguageGenerator extends LanguageGenerator {
38
39     protected void appendClassStart(StringBuffer JavaDoc sb, LanguageData data) {
40         LexerGenUtilities.appendSpaces(sb, 4);
41         sb.append("/** Maximum lexer state determined from xxxConstants class. */\n");
42         LexerGenUtilities.appendSpaces(sb, 4);
43         sb.append("static final int MAX_STATE = ");
44         JavaCCTokenTypes jcctt = (JavaCCTokenTypes)data.getTokenTypes();
45         sb.append(jcctt.getMaxState());
46         sb.append(";\n\n");
47         
48         super.appendClassStart(sb, data);
49     }
50     
51     public String JavaDoc generate(String JavaDoc langClassName, String JavaDoc lexerClassName,
52     String JavaDoc tokenTypesClassName, File JavaDoc xmlLangDescFile)
53     throws ClassNotFoundException JavaDoc, SAXException JavaDoc, IOException JavaDoc {
54
55         LanguageData data = new LanguageData();
56         data.setLanguageClassName(langClassName);
57         data.setLexerClassName(lexerClassName);
58
59         // Apply token constants class info
60 if (tokenTypesClassName != null) {
61             Class JavaDoc tokenTypesClass = Class.forName(tokenTypesClassName);
62             JavaCCTokenTypes tokenTypes = new JavaCCTokenTypes(tokenTypesClass);
63             data.registerTokenTypes(tokenTypes);
64         }
65
66         // Apply possible xml description
67 if (xmlLangDescFile != null) {
68             DescriptionReader xmlLangDesc = new DescriptionReader(
69                 xmlLangDescFile.getAbsolutePath());
70
71             xmlLangDesc.applyTo(data);
72
73         }
74
75         // Update int ids that do not have counterparts in token types
76 data.updateUnassignedIntIds();
77
78         return createSource(data);
79     }
80
81 }
82
83
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