Sonarr/Marr.Data/Reflection/ReflectionHelper.cs

71 lines
2.3 KiB
C#

/* Copyright (C) 2008 - 2011 Jordan Marr
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 3 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.
You should have received a copy of the GNU Lesser General Public
License along with this library. If not, see <http://www.gnu.org/licenses/>. */
using System;
using System.Reflection;
namespace Marr.Data
{
public class ReflectionHelper
{
/// <summary>
/// Converts a DBNull.Value to a null for a reference field,
/// or the default value of a value field.
/// </summary>
/// <param name="fieldType"></param>
/// <returns></returns>
public static object GetDefaultValue(Type fieldType)
{
if (fieldType.IsGenericType)
{
return null;
}
else if (fieldType.IsValueType)
{
return Activator.CreateInstance(fieldType);
}
else
{
return null;
}
}
/// <summary>
/// Gets the CLR data type of a MemberInfo.
/// If the type is nullable, returns the underlying type.
/// </summary>
/// <param name="member"></param>
/// <returns></returns>
public static Type GetMemberType(MemberInfo member)
{
Type memberType = null;
if (member.MemberType == MemberTypes.Property)
memberType = (member as PropertyInfo).PropertyType;
else if (member.MemberType == MemberTypes.Field)
memberType = (member as FieldInfo).FieldType;
else
memberType = typeof(object);
// Handle nullable types - get underlying type
if (memberType.IsGenericType && memberType.GetGenericTypeDefinition() == typeof(Nullable<>))
{
memberType = memberType.GetGenericArguments()[0];
}
return memberType;
}
}
}