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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

 *

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

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 * The above copyright notice and this permission notice shall be

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package jdk.internal.joptsimple.util;

import java.util.regex.Pattern;

import static java.util.regex.Pattern.*;

import jdk.internal.joptsimple.ValueConversionException;

import jdk.internal.joptsimple.ValueConverter;

/**

 * Ensures that values entirely match a regular expression.

 *

 * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>

 */

public class RegexMatcher implements ValueConverter<String> {

    private final Pattern pattern;

    /**

     * Creates a matcher that uses the given regular expression, modified by the given flags.

     *

     * @param pattern the regular expression pattern

     * @param flags modifying regex flags

     * @throws IllegalArgumentException if bit values other than those corresponding to the defined match flags are

     * set in {@code flags}

     * @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid

     */

    public RegexMatcher( String pattern, int flags ) {

        this.pattern = compile( pattern, flags );

    }

    /**

     * Gives a matcher that uses the given regular expression.

     *

     * @param pattern the regular expression pattern

     * @return the new converter

     * @throws java.util.regex.PatternSyntaxException if the expression's syntax is invalid

     */

    public static ValueConverter<String> regex( String pattern ) {

        return new RegexMatcher( pattern, 0 );

    }

    public String convert( String value ) {

        if ( !pattern.matcher( value ).matches() ) {

        }

        return value;

    }

    public Class<String> valueType() {

        return String.class;

    }

    public String valuePattern() {

        return pattern.pattern();

    }

}