| /* |
| * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.tools.javac.parser; |
| |
| import com.sun.tools.javac.util.Context; |
| import com.sun.tools.javac.util.Log; |
| import com.sun.tools.javac.util.Name; |
| |
| import static com.sun.tools.javac.parser.Token.*; |
| |
| /** |
| * Map from Name to Token and Token to String. |
| * |
| * <p><b>This is NOT part of any API supported by Sun Microsystems. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class Keywords { |
| public static final Context.Key<Keywords> keywordsKey = |
| new Context.Key<Keywords>(); |
| |
| public static Keywords instance(Context context) { |
| Keywords instance = context.get(keywordsKey); |
| if (instance == null) |
| instance = new Keywords(context); |
| return instance; |
| } |
| |
| private final Log log; |
| private final Name.Table names; |
| |
| protected Keywords(Context context) { |
| context.put(keywordsKey, this); |
| log = Log.instance(context); |
| names = Name.Table.instance(context); |
| |
| for (Token t : Token.values()) { |
| if (t.name != null) |
| enterKeyword(t.name, t); |
| else |
| tokenName[t.ordinal()] = null; |
| } |
| |
| key = new Token[maxKey+1]; |
| for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER; |
| for (Token t : Token.values()) { |
| if (t.name != null) |
| key[tokenName[t.ordinal()].index] = t; |
| } |
| } |
| |
| |
| public Token key(Name name) { |
| return (name.index > maxKey) ? IDENTIFIER : key[name.index]; |
| } |
| |
| /** |
| * Keyword array. Maps name indices to Token. |
| */ |
| private final Token[] key; |
| |
| /** The number of the last entered keyword. |
| */ |
| private int maxKey = 0; |
| |
| /** The names of all tokens. |
| */ |
| private Name[] tokenName = new Name[Token.values().length]; |
| |
| public String token2string(Token token) { |
| switch (token) { |
| case IDENTIFIER: |
| return log.getLocalizedString("token.identifier"); |
| case CHARLITERAL: |
| return log.getLocalizedString("token.character"); |
| case STRINGLITERAL: |
| return log.getLocalizedString("token.string"); |
| case INTLITERAL: |
| return log.getLocalizedString("token.integer"); |
| case LONGLITERAL: |
| return log.getLocalizedString("token.long-integer"); |
| case FLOATLITERAL: |
| return log.getLocalizedString("token.float"); |
| case DOUBLELITERAL: |
| return log.getLocalizedString("token.double"); |
| case ERROR: |
| return log.getLocalizedString("token.bad-symbol"); |
| case EOF: |
| return log.getLocalizedString("token.end-of-input"); |
| case DOT: case COMMA: case SEMI: case LPAREN: case RPAREN: |
| case LBRACKET: case RBRACKET: case LBRACE: case RBRACE: |
| return "'" + token.name + "'"; |
| default: |
| return token.name; |
| } |
| } |
| |
| private void enterKeyword(String s, Token token) { |
| Name n = names.fromString(s); |
| tokenName[token.ordinal()] = n; |
| if (n.index > maxKey) maxKey = n.index; |
| } |
| } |