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Java > Open Source Codes > org > netbeans > lib > lexer > test > dump > TextAsSingleTokenLexer


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.lib.lexer.test.dump;
21
22 import org.netbeans.api.lexer.Token;
23 import org.netbeans.spi.lexer.Lexer;
24 import org.netbeans.spi.lexer.LexerInput;
25 import org.netbeans.spi.lexer.LexerRestartInfo;
26 import org.netbeans.spi.lexer.TokenFactory;
27
28 /**
29  * Simple implementation a lexer.
30  *
31  * @author mmetelka
32  */
33 final class TextAsSingleTokenLexer implements Lexer<TextAsSingleTokenTokenId> {
34
35     // Copy of LexerInput.EOF
36 private static final int EOF = LexerInput.EOF;
37
38     private LexerInput input;
39
40     private TokenFactory<TextAsSingleTokenTokenId> tokenFactory;
41     
42     TextAsSingleTokenLexer(LexerRestartInfo<TextAsSingleTokenTokenId> info) {
43         this.input = info.input();
44         this.tokenFactory = info.tokenFactory();
45     }
46
47     public Object JavaDoc state() {
48         return null;
49     }
50
51     public Token<TextAsSingleTokenTokenId> nextToken() {
52         while (true) {
53             switch (input.read()) {
54                 case EOF:
55                     return (input.readLength() > 0)
56                         ? tokenFactory.createToken(TextAsSingleTokenTokenId.TEXT)
57                         : null;
58             }
59         }
60     }
61     
62     public void release() {
63     }
64
65 }
66
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