OptionParserState.java

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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) 2004-2015 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
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 * 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.
 *
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 * 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
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 * 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:[email protected]">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 );
}