/*
 * Copyright (c) 2009, 2015, 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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 */

/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * The MIT License
 *
 * Copyright (c) 2004-2014 Paul R. Holser, Jr.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package jdk.internal.joptsimple;

import static jdk.internal.joptsimple.ParserRules.*;

/**
 * Abstraction of parser state; mostly serves to model how a parser behaves depending on whether end-of-options
 * has been detected.
 *
 * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
 */
abstract class OptionParserState {
    static OptionParserState noMoreOptions() {
        return new OptionParserState() {
            @Override
            protected void handleArgument( OptionParser parser, ArgumentList arguments, OptionSet detectedOptions ) {
                parser.handleNonOptionArgument( arguments.next(), arguments, detectedOptions );
            }
        };
    }

    static OptionParserState moreOptions( final boolean posixlyCorrect ) {
        return new OptionParserState() {
            @Override
            protected void handleArgument( OptionParser parser, ArgumentList arguments, OptionSet detectedOptions ) {
                String candidate = arguments.next();
                try {
                    if ( isOptionTerminator( candidate ) ) {
                        parser.noMoreOptions();
                        return;
                    } else if ( isLongOptionToken( candidate ) ) {
                        parser.handleLongOptionToken( candidate, arguments, detectedOptions );
                        return;
                    } else if ( isShortOptionToken( candidate ) ) {
                        parser.handleShortOptionToken( candidate, arguments, detectedOptions );
                        return;
                    }
                } catch ( UnrecognizedOptionException e ) {
                    if ( !parser.doesAllowsUnrecognizedOptions() )
                        throw e;
                }

                if ( posixlyCorrect )
                    parser.noMoreOptions();

                parser.handleNonOptionArgument( candidate, arguments, detectedOptions );
            }
        };
    }

    protected abstract void handleArgument( OptionParser parser, ArgumentList arguments, OptionSet detectedOptions );
}