Parser Schemas– Easy and Powerful parsing of XML-based languages

/***********************************************************************\
 * Comnicate.CodeDom.Xml.ParserSchemas                                 *
 * Parses xml-based languages according to a user defined schema.      *
 * Copyright � 2005 Tomas Deml (as Comnicate!)                         *
 *                  tomasdeml@msn.com                                  *
 *                                                                     *
 * This library is free software; you can redistribute it and/or       *
 * modify it under the terms of the GNU Lesser General Public          *
 * License as published by the Free Software Foundation; either        *
 * version 2.1 of the License, or (at your option) any later version.  *
 *                                                                     *
 * This library 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   *
 * Lesser General Public License for more details.                     *
\***********************************************************************/

using System;
using System.Collections.Generic;
using System.Text;

namespace Comnicate.CodeDom.Xml.ParserSchemas.Rules.Evaluation.PrimitiveValueValidators
{
    /// <summary>
    /// Validates enum values.
    /// </summary>
    public sealed class EnumValueValidator : IValueValidator
    {
        #region Fields

        private Type EnumType;

        #endregion

        #region .ctors, properties & methods

        /// <summary>
        /// Initializes a new instance of the <see cref="EnumValueValidator"/> class.
        /// </summary>
        private EnumValueValidator() { }

        /// <summary>
        /// Creates the validator for a specific enum type.
        /// </summary>
        public static IValueValidator Create(Type enumType)
        {
            // Null?
            if (enumType == null) throw new ArgumentNullException("enumType");

            // Create specific instance
            EnumValueValidator validator = new EnumValueValidator();
            validator.EnumType = enumType;

            // Return
            return validator;
        }

        #region IValueValidator Members

        /// <summary>
        /// Validates the enum value.
        /// </summary>
        /// <param name="value">Enum value.</param>
        /// <param name="matchingRule">Rule to validate.</param>
        /// <returns>True if valid; false if invalid.</returns>
        public bool IsValidValue(string value, ValidatingNonParentalRule matchingRule)
        {
            return Enum.IsDefined(this.EnumType, value);
        }

        #endregion

        #endregion
    }
}