KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > netbeans > modules > lexer > demo > antlr > CalcLanguageUtilities


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.demo.antlr;
21
22 import org.netbeans.api.lexer.TokenCategory;
23 import org.netbeans.api.lexer.TokenId;
24
25 /**
26  * Various utility methods over CalcLanguage.
27  *
28  * @author Miloslav Metelka
29  * @version 1.00
30  */
31
32 public class CalcLanguageUtilities {
33
34     private static final CalcLanguage language = CalcLanguage.get();
35
36     private static final TokenCategory errorCategory = language.getCategory("error");
37     private static final TokenCategory incompleteCategory = language.getCategory("incomplete");
38     private static final TokenCategory operatorCategory = language.getCategory("operator");
39     
40     private CalcLanguageUtilities() {
41         // no instances
42 }
43  
44     /**
45      * Does the given tokenId represent an errorneous lexical construction?
46      * @param id tokenId to check. It must be part of the CalcLanguage.
47      * @return true if the id is in "error" category.
48      */
49     public static boolean isError(TokenId id) {
50         return errorCategory.isMember(id);
51     }
52
53     /**
54      * Does the given tokenId represent an incomplete token?
55      * @param id tokenId to check. It must be part of the CalcLanguage.
56      * @return true if the id is in "incomplete" category.
57      */
58     public static boolean isIncomplete(TokenId id) {
59         return incompleteCategory.isMember(id);
60     }
61
62    /**
63      * Does the given tokenId represent an operator?
64      * @param id tokenId to check. It must be part of the CalcLanguage.
65      * @return true if the id is in "operator" category.
66      */
67     public static boolean isOperator(TokenId id) {
68         return operatorCategory.isMember(id);
69     }
70     
71 }
72
Popular Tags