jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/parser/Keywords.java@f2fdd52e4e87

6944312: Potential rebranding issues in openjdk/langtools repository sources
Reviewed-by: darcy

     1 /*

     2  * Copyright (c) 2002, 2008, Oracle and/or its affiliates. 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * 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 supported API.

    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 Names names;

    56     protected Keywords(Context context) {

    57         context.put(keywordsKey, this);

    58         names = Names.instance(context);

    60         for (Token t : Token.values()) {

    61             if (t.name != null)

    62                 enterKeyword(t.name, t);

    63             else

    64                 tokenName[t.ordinal()] = null;

    65         }

    67         key = new Token[maxKey+1];

    68         for (int i = 0; i <= maxKey; i++) key[i] = IDENTIFIER;

    69         for (Token t : Token.values()) {

    70             if (t.name != null)

    71                 key[tokenName[t.ordinal()].getIndex()] = t;

    72         }

    73     }

    76     public Token key(Name name) {

    77         return (name.getIndex() > maxKey) ? IDENTIFIER : key[name.getIndex()];

    78     }

    80     /**

    81      * Keyword array. Maps name indices to Token.

    82      */

    83     private final Token[] key;

    85     /**  The number of the last entered keyword.

    86      */

    87     private int maxKey = 0;

    89     /** The names of all tokens.

    90      */

    91     private Name[] tokenName = new Name[Token.values().length];

    93     private void enterKeyword(String s, Token token) {

    94         Name n = names.fromString(s);

    95         tokenName[token.ordinal()] = n;

    96         if (n.getIndex() > maxKey) maxKey = n.getIndex();

    97     }

    98 }

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