jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/parser/Keywords.java@24a47c3062fe

6754988: Update copyright year
Summary: Update for files that have been modified starting July 2008
Reviewed-by: ohair, tbell

     1 /*

     2  * Copyright 2002-2008 Sun Microsystems, Inc.  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.  Sun designates this

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

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any 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 API supported by Sun Microsystems.

    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 Log log;

    55     private final Names names;

    57     protected Keywords(Context context) {

    58         context.put(keywordsKey, this);

    59         log = Log.instance(context);

    60         names = Names.instance(context);

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

    63             if (t.name != null)

    64                 enterKeyword(t.name, t);

    65             else

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

    67         }

    69         key = new Token[maxKey+1];

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

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

    72             if (t.name != null)

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

    74         }

    75     }

    78     public Token key(Name name) {

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

    80     }

    82     /**

    83      * Keyword array. Maps name indices to Token.

    84      */

    85     private final Token[] key;

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

    88      */

    89     private int maxKey = 0;

    91     /** The names of all tokens.

    92      */

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

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

    96         Name n = names.fromString(s);

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

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

    99     }

   100 }

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