/*

 * Copyright 1999-2008 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.code.Source;

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

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

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

import com.sun.tools.javac.util.Name;

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

/**

 * A factory for creating parsers.

 */

public class ParserFactory {

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

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

    public static ParserFactory instance(Context context) {

        ParserFactory instance = context.get(parserFactoryKey);

        if (instance == null) {

            instance = new ParserFactory(context);

        }

        return instance;

    }

    final TreeMaker F;

    final Log log;

    final Keywords keywords;

    final Source source;

    final Name.Table names;

    final Options options;

    final Scanner.Factory scannerFactory;

    protected ParserFactory(Context context) {

        super();

        context.put(parserFactoryKey, this);

        this.F = TreeMaker.instance(context);

        this.log = Log.instance(context);

        this.names = Name.Table.instance(context);

        this.keywords = Keywords.instance(context);

        this.source = Source.instance(context);

        this.options = Options.instance(context);

        this.scannerFactory = Scanner.Factory.instance(context);

    }

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

        Lexer lexer = scannerFactory.newScanner(input);

        if (keepEndPos) {

            return new EndPosParser(this, lexer, keepDocComments, keepLineMap);

        } else {

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

        }

    }

}