DefaultToken


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.token;
21  
22  import org.netbeans.api.lexer.TokenId;
23  
24  /**
25   * Default token which by default obtains text from its background storage.
26   * <br/>
27   * It is non-flyweight and it does not contain custom text.
28   *
29   * <p>
30   * Once the token gets removed from a token list
31   * (because of a text modification) the token
32   * returns <code>null</code> from {@link #text()} because the text
33   * that it would represent could no longer exist in the document.
34   * </p>
35   *
36   * @author Miloslav Metelka
37   * @version 1.00
38   */
39  
40  public class DefaultToken<T extends TokenId> extends AbstractToken<T> implements CharSequence   {
41      
42      private final int length; // 24 bytes (20-super + 4)
43      
44      /**
45       * Construct new default token.
46       */
47      public DefaultToken(T id, int length) {
48          super(id);
49          assert (length > 0) : "Token length=" + length + " <= 0"; // NOI18N
50          this.length = length;
51      }
52      
53      /**
54       * Construct a special zero-length token.
55       */
56      public DefaultToken(T id) {
57          super(id);
58          this.length = 0;
59      }
60  
61      @Override  
62      public final int length() {
63          return length;
64      }
65  
66      @Override  
67      protected String   dumpInfoTokenType() {
68          return "DefT"; // NOI18N "TextToken" or "FlyToken"
69      }
70      
71  }
72
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags