01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
28: * Microsystems, Inc. All Rights Reserved.
29: *
30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
34: * single choice of license, a recipient has the option to distribute
35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
37: * However, if you add GPL Version 2 code and therefore, elected the GPL
38: * Version 2 license, then the option applies only if the new code is
39: * made subject to such option by the copyright holder.
40: */
41:
42: package org.netbeans.lib.lexer.token;
43:
44: import org.netbeans.api.lexer.TokenId;
45:
46: /**
47: * Default token which by default obtains text from its background storage.
48: * <br/>
49: * It is non-flyweight and it does not contain custom text.
50: *
51: * <p>
52: * Once the token gets removed from a token list
53: * (because of a text modification) the token
54: * returns <code>null</code> from {@link #text()} because the text
55: * that it would represent could no longer exist in the document.
56: * </p>
57: *
58: * @author Miloslav Metelka
59: * @version 1.00
60: */
61:
62: public class DefaultToken<T extends TokenId> extends AbstractToken<T>
63: implements CharSequence {
64:
65: private final int length; // 24 bytes (20-super + 4)
66:
67: /**
68: * Construct new default token.
69: */
70: public DefaultToken(T id, int length) {
71: super (id);
72: assert (length > 0) : "Token length=" + length + " <= 0"; // NOI18N
73: this .length = length;
74: }
75:
76: /**
77: * Construct a special zero-length token.
78: */
79: public DefaultToken(T id) {
80: super (id);
81: this .length = 0;
82: }
83:
84: @Override
85: public final int length() {
86: return length;
87: }
88:
89: @Override
90: protected String dumpInfoTokenType() {
91: return "DefT"; // NOI18N "TextToken" or "FlyToken"
92: }
93:
94: }
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