0N/A/*
797N/A * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
553N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
553N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
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0N/A */
0N/A
0N/Apackage com.sun.tools.javac.parser;
0N/A
0N/Aimport com.sun.tools.javac.util.Context;
0N/Aimport com.sun.tools.javac.util.Log;
0N/Aimport com.sun.tools.javac.util.Name;
112N/Aimport com.sun.tools.javac.util.Names;
0N/A
0N/Aimport static com.sun.tools.javac.parser.Token.*;
0N/A
0N/A/**
0N/A * Map from Name to Token and Token to String.
0N/A *
580N/A * <p><b>This is NOT part of any supported API.
0N/A * If you write code that depends on this, you do so at your own risk.
0N/A * This code and its internal interfaces are subject to change or
0N/A * deletion without notice.</b>
0N/A */
0N/Apublic class Keywords {
0N/A public static final Context.Key<Keywords> keywordsKey =
0N/A new Context.Key<Keywords>();
0N/A
0N/A public static Keywords instance(Context context) {
0N/A Keywords instance = context.get(keywordsKey);
0N/A if (instance == null)
0N/A instance = new Keywords(context);
0N/A return instance;
0N/A }
0N/A
112N/A private final Names names;
0N/A
0N/A protected Keywords(Context context) {
0N/A context.put(keywordsKey, this);
112N/A names = Names.instance(context);
0N/A
0N/A for (Token t : Token.values()) {
0N/A if (t.name != null)
0N/A enterKeyword(t.name, t);
0N/A else
0N/A tokenName[t.ordinal()] = null;
0N/A }
0N/A
0N/A key = new Token[maxKey+1];
0N/A for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER;
0N/A for (Token t : Token.values()) {
0N/A if (t.name != null)
112N/A key[tokenName[t.ordinal()].getIndex()] = t;
0N/A }
0N/A }
0N/A
0N/A
0N/A public Token key(Name name) {
112N/A return (name.getIndex() > maxKey) ? IDENTIFIER : key[name.getIndex()];
0N/A }
0N/A
0N/A /**
0N/A * Keyword array. Maps name indices to Token.
0N/A */
0N/A private final Token[] key;
0N/A
0N/A /** The number of the last entered keyword.
0N/A */
0N/A private int maxKey = 0;
0N/A
0N/A /** The names of all tokens.
0N/A */
0N/A private Name[] tokenName = new Name[Token.values().length];
0N/A
0N/A private void enterKeyword(String s, Token token) {
0N/A Name n = names.fromString(s);
0N/A tokenName[token.ordinal()] = n;
112N/A if (n.getIndex() > maxKey) maxKey = n.getIndex();
0N/A }
0N/A}