1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/javac/parser/Keywords.java Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,127 @@
1.4 +/*
1.5 + * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.javac.parser;
1.30 +
1.31 +import com.sun.tools.javac.util.Context;
1.32 +import com.sun.tools.javac.util.Log;
1.33 +import com.sun.tools.javac.util.Name;
1.34 +
1.35 +import static com.sun.tools.javac.parser.Token.*;
1.36 +
1.37 +/**
1.38 + * Map from Name to Token and Token to String.
1.39 + *
1.40 + * <p><b>This is NOT part of any API supported by Sun Microsystems.
1.41 + * If you write code that depends on this, you do so at your own risk.
1.42 + * This code and its internal interfaces are subject to change or
1.43 + * deletion without notice.</b>
1.44 + */
1.45 +public class Keywords {
1.46 + public static final Context.Key<Keywords> keywordsKey =
1.47 + new Context.Key<Keywords>();
1.48 +
1.49 + public static Keywords instance(Context context) {
1.50 + Keywords instance = context.get(keywordsKey);
1.51 + if (instance == null)
1.52 + instance = new Keywords(context);
1.53 + return instance;
1.54 + }
1.55 +
1.56 + private final Log log;
1.57 + private final Name.Table names;
1.58 +
1.59 + protected Keywords(Context context) {
1.60 + context.put(keywordsKey, this);
1.61 + log = Log.instance(context);
1.62 + names = Name.Table.instance(context);
1.63 +
1.64 + for (Token t : Token.values()) {
1.65 + if (t.name != null)
1.66 + enterKeyword(t.name, t);
1.67 + else
1.68 + tokenName[t.ordinal()] = null;
1.69 + }
1.70 +
1.71 + key = new Token[maxKey+1];
1.72 + for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER;
1.73 + for (Token t : Token.values()) {
1.74 + if (t.name != null)
1.75 + key[tokenName[t.ordinal()].index] = t;
1.76 + }
1.77 + }
1.78 +
1.79 +
1.80 + public Token key(Name name) {
1.81 + return (name.index > maxKey) ? IDENTIFIER : key[name.index];
1.82 + }
1.83 +
1.84 + /**
1.85 + * Keyword array. Maps name indices to Token.
1.86 + */
1.87 + private final Token[] key;
1.88 +
1.89 + /** The number of the last entered keyword.
1.90 + */
1.91 + private int maxKey = 0;
1.92 +
1.93 + /** The names of all tokens.
1.94 + */
1.95 + private Name[] tokenName = new Name[Token.values().length];
1.96 +
1.97 + public String token2string(Token token) {
1.98 + switch (token) {
1.99 + case IDENTIFIER:
1.100 + return log.getLocalizedString("token.identifier");
1.101 + case CHARLITERAL:
1.102 + return log.getLocalizedString("token.character");
1.103 + case STRINGLITERAL:
1.104 + return log.getLocalizedString("token.string");
1.105 + case INTLITERAL:
1.106 + return log.getLocalizedString("token.integer");
1.107 + case LONGLITERAL:
1.108 + return log.getLocalizedString("token.long-integer");
1.109 + case FLOATLITERAL:
1.110 + return log.getLocalizedString("token.float");
1.111 + case DOUBLELITERAL:
1.112 + return log.getLocalizedString("token.double");
1.113 + case ERROR:
1.114 + return log.getLocalizedString("token.bad-symbol");
1.115 + case EOF:
1.116 + return log.getLocalizedString("token.end-of-input");
1.117 + case DOT: case COMMA: case SEMI: case LPAREN: case RPAREN:
1.118 + case LBRACKET: case RBRACKET: case LBRACE: case RBRACE:
1.119 + return "'" + token.name + "'";
1.120 + default:
1.121 + return token.name;
1.122 + }
1.123 + }
1.124 +
1.125 + private void enterKeyword(String s, Token token) {
1.126 + Name n = names.fromString(s);
1.127 + tokenName[token.ordinal()] = n;
1.128 + if (n.index > maxKey) maxKey = n.index;
1.129 + }
1.130 +}
