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//
// MemberAddress.cs
//
// Author:
// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
//
// Copyright (c) 2016 jp
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Linq;
using System.Reflection;
namespace Crow.IML
{
/// <summary>
/// Address member of a node
/// </summary>
public struct MemberAddress
{
public string memberName;
public MemberInfo member;
public NodeAddress Address;
public PropertyInfo Property { get { return member as PropertyInfo; }}
public bool IsTemplateBinding { get { return Address == null ? false : Address.Count == 0; }}
// public string Name {
// get { return memberName; }
// set { memberName = value; }
// }
public MemberAddress (NodeAddress _address, string _member, bool findMember = true)
{
Address = _address;
memberName = _member;
member = null;
if (Address == null)
return;
if (Address.Count == 0)
return;
if (!findMember)
return;
if (!tryFindMember ())
throw new Exception ("Member Not Found: " + memberName);
}
public MemberAddress (NodeAddress _address, MemberInfo _member)
{
Address = _address;
member = _member;
memberName = "";
if (member != null)
memberName = member.Name;
}
#region Equality Compare
public override bool Equals (object obj)
{
return obj is MemberAddress && this == (MemberAddress)obj;
}
public override int GetHashCode ()
{
return Address.GetHashCode () ^ member.GetHashCode ();
}
public static bool operator == (MemberAddress x, MemberAddress y)
{
return x.Address == y.Address && x.memberName == y.memberName;
}
public static bool operator != (MemberAddress x, MemberAddress y)
{
return !(x == y);
}
#endregion
bool tryFindMember ()
{
if (member != null)
throw new Exception ("member already found");
if (Address == null)
return false;
if (Address.Count == 0)
return false;
Type t = Address.LastOrDefault ().CrowType;
member = t.GetMember (memberName, BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance).FirstOrDefault ();
#region search for extensions methods if member not found in type
if (member == null && !string.IsNullOrEmpty (memberName)) {
Assembly a = Assembly.GetExecutingAssembly ();
string mn = memberName;
member = CompilerServices.GetExtensionMethods (a, t).Where (em => em.Name == mn).FirstOrDefault ();
}
#endregion
return member != null;
}
}
}
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