/*

 * Copyright (c) 2014, 2017, Oracle and/or its affiliates. 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.  Oracle designates this

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

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

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package jdk.jshell;

import com.sun.tools.javac.parser.JavacParser;

import com.sun.tools.javac.parser.ParserFactory;

import com.sun.tools.javac.parser.ScannerFactory;

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

/**

 *

 * @author Robert Field

 */

class ReplParserFactory extends ParserFactory {

    // force starting in expression mode

    private final boolean forceExpression;

    public static void preRegister(Context context, boolean forceExpression) {

        class Mark {}

        if (context.get(Mark.class) == null) { //don't register the factory if Context is reused

            context.put(parserFactoryKey, (Context.Factory<ParserFactory>)

                    (c -> new ReplParserFactory(c, forceExpression)));

            context.put(Mark.class, new Mark());

        }

    }

    private final ScannerFactory scannerFactory;

    protected ReplParserFactory(Context context, boolean forceExpression) {

        super(context);

        this.forceExpression = forceExpression;

        this.scannerFactory = ScannerFactory.instance(context);

    }

    @Override

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

        com.sun.tools.javac.parser.Lexer lexer = scannerFactory.newScanner(input, keepDocComments);

        return new ReplParser(this, lexer, keepDocComments, keepLineMap, keepEndPos, forceExpression);

    }

    @Override

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

        return newParser(input, keepDocComments, keepEndPos, keepLineMap);

    }

}