ParseMethodAttribute.cs

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#region MIT License
/*
 * Copyright (c) 2005-2008 Jonathan Mark Porter. http://physics2d.googlepages.com/
 * 
 * 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.
 */
#endregion
 
 
 
using System;
using System.Reflection;
 
namespace AdvanceMath.Design
{
    [global::System.AttributeUsage(AttributeTargets.Method, Inherited = false, AllowMultiple = false)]
    public sealed class ParseMethodAttribute : Attribute
    {
#if !WINDOWS_STOREAPP
        public static MethodInfo GetParseMethod(Type t)
        {
            foreach (MethodInfo method in t.GetMethods())
            {
                if (method.IsStatic &&
                    method.GetCustomAttributes(typeof(ParseMethodAttribute), true).Length > 0 &&
                    method.GetParameters().Length == 1 &&
                    method.GetParameters()[0].ParameterType == typeof(string) &&
                    method.ReturnType == t)
                {
                    return method;
                }
            }
            return null;
        }
#else
        public static MethodInfo GetParseMethod(Type t)
        {
            // Use the Win8 "new" reflection model
            TypeInfo ti = t.GetTypeInfo();
 
            foreach (MethodInfo method in ti.DeclaredMethods)
            {
                if (method.IsStatic &&
                    !IsEmpty( method.GetCustomAttributes(typeof(ParseMethodAttribute), true) ) &&
                    method.GetParameters().Length == 1 &&
                    method.GetParameters()[0].ParameterType == typeof(string) &&
                    method.ReturnType == t)
                {
                    return method;
                }
            }
            return null;
        }
 
        private static bool IsEmpty( IEnumerable collection )
        {
            IEnumerator e = collection.GetEnumerator();
            return e.MoveNext();
        }
#endif
    }
}