Wed, 20 May 2009 13:36:23 -0700
6827026: Change javac source and target default to 7
Reviewed-by: darcy, ohair
1 /*
2 * Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.javac.parser;
28 import com.sun.tools.javac.util.Context;
29 import com.sun.tools.javac.util.Log;
30 import com.sun.tools.javac.util.Name;
31 import com.sun.tools.javac.util.Names;
33 import static com.sun.tools.javac.parser.Token.*;
35 /**
36 * Map from Name to Token and Token to String.
37 *
38 * <p><b>This is NOT part of any API supported by Sun Microsystems.
39 * If you write code that depends on this, you do so at your own risk.
40 * This code and its internal interfaces are subject to change or
41 * deletion without notice.</b>
42 */
43 public class Keywords {
44 public static final Context.Key<Keywords> keywordsKey =
45 new Context.Key<Keywords>();
47 public static Keywords instance(Context context) {
48 Keywords instance = context.get(keywordsKey);
49 if (instance == null)
50 instance = new Keywords(context);
51 return instance;
52 }
54 private final Log log;
55 private final Names names;
57 protected Keywords(Context context) {
58 context.put(keywordsKey, this);
59 log = Log.instance(context);
60 names = Names.instance(context);
62 for (Token t : Token.values()) {
63 if (t.name != null)
64 enterKeyword(t.name, t);
65 else
66 tokenName[t.ordinal()] = null;
67 }
69 key = new Token[maxKey+1];
70 for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER;
71 for (Token t : Token.values()) {
72 if (t.name != null)
73 key[tokenName[t.ordinal()].getIndex()] = t;
74 }
75 }
78 public Token key(Name name) {
79 return (name.getIndex() > maxKey) ? IDENTIFIER : key[name.getIndex()];
80 }
82 /**
83 * Keyword array. Maps name indices to Token.
84 */
85 private final Token[] key;
87 /** The number of the last entered keyword.
88 */
89 private int maxKey = 0;
91 /** The names of all tokens.
92 */
93 private Name[] tokenName = new Name[Token.values().length];
95 private void enterKeyword(String s, Token token) {
96 Name n = names.fromString(s);
97 tokenName[token.ordinal()] = n;
98 if (n.getIndex() > maxKey) maxKey = n.getIndex();
99 }
100 }