Mercurial > jdk8-mips64-public > langtools / annotate
src/share/classes/com/sun/tools/javac/parser/Keywords.java@c315df443ff2 (annotated)
src/share/classes/com/sun/tools/javac/parser/Keywords.java
Fri, 08 Jan 2010 11:11:33 -0800
- author
- jjg
- date
- Fri, 08 Jan 2010 11:11:33 -0800
- changeset 459
- c315df443ff2
- parent 117
- 24a47c3062fe
- child 554
- 9d9f26857129
- permissions
- -rw-r--r--
6878147: Keywords.log is declared and initialized but unused
Reviewed-by: darcy
| duke@1 | 1 | /* |
| xdono@117 | 2 | * Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved. |
| duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@1 | 4 | * |
| duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@1 | 7 | * published by the Free Software Foundation. Sun designates this |
| duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
| duke@1 | 9 | * by Sun in the LICENSE file that accompanied this code. |
| duke@1 | 10 | * |
| duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@1 | 15 | * accompanied this code). |
| duke@1 | 16 | * |
| duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
| duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@1 | 20 | * |
| duke@1 | 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@1 | 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@1 | 23 | * have any questions. |
| duke@1 | 24 | */ |
| duke@1 | 25 | |
| duke@1 | 26 | package com.sun.tools.javac.parser; |
| duke@1 | 27 | |
| duke@1 | 28 | import com.sun.tools.javac.util.Context; |
| duke@1 | 29 | import com.sun.tools.javac.util.Log; |
| duke@1 | 30 | import com.sun.tools.javac.util.Name; |
| jjg@113 | 31 | import com.sun.tools.javac.util.Names; |
| duke@1 | 32 | |
| duke@1 | 33 | import static com.sun.tools.javac.parser.Token.*; |
| duke@1 | 34 | |
| duke@1 | 35 | /** |
| duke@1 | 36 | * Map from Name to Token and Token to String. |
| duke@1 | 37 | * |
| duke@1 | 38 | * <p><b>This is NOT part of any API supported by Sun Microsystems. |
| duke@1 | 39 | * If you write code that depends on this, you do so at your own risk. |
| duke@1 | 40 | * This code and its internal interfaces are subject to change or |
| duke@1 | 41 | * deletion without notice.</b> |
| duke@1 | 42 | */ |
| duke@1 | 43 | public class Keywords { |
| duke@1 | 44 | public static final Context.Key<Keywords> keywordsKey = |
| duke@1 | 45 | new Context.Key<Keywords>(); |
| duke@1 | 46 | |
| duke@1 | 47 | public static Keywords instance(Context context) { |
| duke@1 | 48 | Keywords instance = context.get(keywordsKey); |
| duke@1 | 49 | if (instance == null) |
| duke@1 | 50 | instance = new Keywords(context); |
| duke@1 | 51 | return instance; |
| duke@1 | 52 | } |
| duke@1 | 53 | |
| jjg@113 | 54 | private final Names names; |
| duke@1 | 55 | |
| duke@1 | 56 | protected Keywords(Context context) { |
| duke@1 | 57 | context.put(keywordsKey, this); |
| jjg@113 | 58 | names = Names.instance(context); |
| duke@1 | 59 | |
| duke@1 | 60 | for (Token t : Token.values()) { |
| duke@1 | 61 | if (t.name != null) |
| duke@1 | 62 | enterKeyword(t.name, t); |
| duke@1 | 63 | else |
| duke@1 | 64 | tokenName[t.ordinal()] = null; |
| duke@1 | 65 | } |
| duke@1 | 66 | |
| duke@1 | 67 | key = new Token[maxKey+1]; |
| duke@1 | 68 | for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER; |
| duke@1 | 69 | for (Token t : Token.values()) { |
| duke@1 | 70 | if (t.name != null) |
| jjg@113 | 71 | key[tokenName[t.ordinal()].getIndex()] = t; |
| duke@1 | 72 | } |
| duke@1 | 73 | } |
| duke@1 | 74 | |
| duke@1 | 75 | |
| duke@1 | 76 | public Token key(Name name) { |
| jjg@113 | 77 | return (name.getIndex() > maxKey) ? IDENTIFIER : key[name.getIndex()]; |
| duke@1 | 78 | } |
| duke@1 | 79 | |
| duke@1 | 80 | /** |
| duke@1 | 81 | * Keyword array. Maps name indices to Token. |
| duke@1 | 82 | */ |
| duke@1 | 83 | private final Token[] key; |
| duke@1 | 84 | |
| duke@1 | 85 | /** The number of the last entered keyword. |
| duke@1 | 86 | */ |
| duke@1 | 87 | private int maxKey = 0; |
| duke@1 | 88 | |
| duke@1 | 89 | /** The names of all tokens. |
| duke@1 | 90 | */ |
| duke@1 | 91 | private Name[] tokenName = new Name[Token.values().length]; |
| duke@1 | 92 | |
| duke@1 | 93 | private void enterKeyword(String s, Token token) { |
| duke@1 | 94 | Name n = names.fromString(s); |
| duke@1 | 95 | tokenName[token.ordinal()] = n; |
| jjg@113 | 96 | if (n.getIndex() > maxKey) maxKey = n.getIndex(); |
| duke@1 | 97 | } |
| duke@1 | 98 | } |
