Types/EnumLookup.cs

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/*
 * Author: Kishore Reddy
 * Url: http://commonlibrarynet.codeplex.com/
 * Title: CommonLibrary.NET
 * Copyright: � 2009 Kishore Reddy
 * License: LGPL License
 * LicenseUrl: http://commonlibrarynet.codeplex.com/license
 * Description: A C# based .NET 3.5 Open-Source collection of reusable components.
 * Usage: Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;


namespace ComLib
{
    /// <summary>
    /// Enum lookup extensions.
    /// </summary>
    public static class EnumLookupExtensions
    {
        /// <summary>
        /// Parses a string after validating it and returns 
        /// the value of the enumeration it represents.
        /// </summary>
        /// <param name="lookup">Enumeration lookup.</param>
        /// <param name="enumType">Type of enumeration.</param>
        /// <param name="val">Value of string.</param>
        /// <param name="results">Validation results.</param>
        /// <returns>Enumeration value.</returns>
        public static object GetValue(this EnumLookup lookup, Type enumType, string val, IValidationResults results)
        {
            return GetValue(lookup, enumType, val, results, string.Empty);
        }


        /// Parses a string after validating it and returns 
        /// the value of the enumeration it represents.
        /// <param name="lookup">Enumeration lookup.</param>
        /// <param name="enumType">Type of enumeration.</param>
        /// <param name="val">Value of string.</param>
        /// <param name="results">Validation results.</param>
        /// <param name="defaultValue">Default value.</param>
        /// <returns>Enumeration value.</returns>
        public static object GetValue(this EnumLookup lookup, Type enumType, string val, IValidationResults results, string defaultValue)
        {
            // Invalid enum value.
            if (!EnumLookup.IsValid(enumType, val))
            {
                results.Add("Invalid value '" + val + "' for " + enumType.Name);
                return false;
            }