jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/parser/ParserFactory.java@7375d4979bd3

     1 /*

     2  * Copyright (c) 1999, 2011, 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.code.Source;

    29 import com.sun.tools.javac.tree.TreeMaker;

    30 import com.sun.tools.javac.util.Context;

    31 import com.sun.tools.javac.util.Log;

    32 import com.sun.tools.javac.util.Names;

    33 import com.sun.tools.javac.util.Options;

    35 /**

    36  * A factory for creating parsers.

    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 ParserFactory {

    45     /** The context key for the parser factory. */

    46     protected static final Context.Key<ParserFactory> parserFactoryKey = new Context.Key<ParserFactory>();

    48     public static ParserFactory instance(Context context) {

    49         ParserFactory instance = context.get(parserFactoryKey);

    50         if (instance == null) {

    51             instance = new ParserFactory(context);

    52         }

    53         return instance;

    54     }

    56     final TreeMaker F;

    57     final Log log;

    58     final Tokens tokens;

    59     final Source source;

    60     final Names names;

    61     final Options options;

    62     final ScannerFactory scannerFactory;

    64     protected ParserFactory(Context context) {

    65         super();

    66         context.put(parserFactoryKey, this);

    67         this.F = TreeMaker.instance(context);

    68         this.log = Log.instance(context);

    69         this.names = Names.instance(context);

    70         this.tokens = Tokens.instance(context);

    71         this.source = Source.instance(context);

    72         this.options = Options.instance(context);

    73         this.scannerFactory = ScannerFactory.instance(context);

    74     }

    76     public Parser newParser(CharSequence input, boolean keepDocComments, boolean keepEndPos, boolean keepLineMap) {

    77         Lexer lexer = scannerFactory.newScanner(input, keepDocComments);

    78         return new JavacParser(this, lexer, keepDocComments, keepLineMap, keepEndPos);

    79     }

    80 }

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