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: * If you wish your version of this file to be governed by only the CDDL
25: * or only the GPL Version 2, indicate your decision by adding
26: * "[Contributor] elects to include this software in this distribution
27: * under the [CDDL or GPL Version 2] license." If you do not indicate a
28: * single choice of license, a recipient has the option to distribute
29: * your version of this file under either the CDDL, the GPL Version 2 or
30: * to extend the choice of license to its licensees as provided above.
31: * However, if you add GPL Version 2 code and therefore, elected the GPL
32: * Version 2 license, then the option applies only if the new code is
33: * made subject to such option by the copyright holder.
34: *
35: * Contributor(s):
36: *
37: * The Original Software is NetBeans. The Initial Developer of the Original
38: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
39: * Microsystems, Inc. All Rights Reserved.
40: *
41: * If you wish your version of this file to be governed by only the CDDL
42: * or only the GPL Version 2, indicate your decision by adding
43: * "[Contributor] elects to include this software in this distribution
44: * under the [CDDL or GPL Version 2] license." If you do not indicate a
45: * single choice of license, a recipient has the option to distribute
46: * your version of this file under either the CDDL, the GPL Version 2 or
47: * to extend the choice of license to its licensees as provided above.
48: * However, if you add GPL Version 2 code and therefore, elected the GPL
49: * Version 2 license, then the option applies only if the new code is
50: * made subject to such option by the copyright holder.
51: */
52: package org.netbeans.cnd.api.lexer;
53:
54: import java.util.HashMap;
55: import java.util.Map;
56: import org.netbeans.api.lexer.TokenId;
57:
58: /**
59: * help class to match known text with existing token ids.
60: * Can be used to match identifiers which are keywords
61: * @author Vladimir Voskresensky
62: */
63: public final class Filter<T extends TokenId> {
64:
65: private Map<CharSequence, T> filter = new HashMap<CharSequence, T>();
66:
67: /*package*/Filter() {
68:
69: }
70:
71: /**
72: * process specific text and return correspondent token-id if match.
73: * Provided text doesn't have escaped LFs, so text can be matched using maps
74: * @param text text without escaped LFs
75: * @return TokenID or null if text does not match to any known id
76: */
77: public final T check(CharSequence text) {
78: return filter.get(text);
79: }
80:
81: /**
82: * add text to be filtered as id
83: */
84: /*package*/final void addMatch(CharSequence text, T id) {
85: filter.put(text, id);
86: }
87:
88: }
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