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using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine;
namespace AdvancedInspector
{
/// <summary>
/// Some object cannot be created with an empty constructor.
/// This runtime attribute lets you create the object by yourself.
/// </summary>
[AttributeUsage(AttributeTargets.Field | AttributeTargets.Property)]
public class ConstructorAttribute : Attribute, IRuntimeAttribute<object>
{
public delegate object ConstructorDelegate();
public delegate object ConstructorStaticDelegate(ConstructorAttribute constructor, object instance, object value);
#region IRuntime Implementation
private string methodName = "";
public string MethodName
{
get { return methodName; }
}
public Type Template
{
get { return typeof(ConstructorDelegate); }
}
public Type TemplateStatic
{
get { return typeof(ConstructorStaticDelegate); }
}
private List<Delegate> delegates = new List<Delegate>();
public List<Delegate> Delegates
{
get { return delegates; }
set { delegates = value; }
}
public object Invoke(int index, object instance, object value)
{
if (delegates.Count == 0 || index >= delegates.Count)
return null;
try
{
if (delegates[index].Target == null)
{
return delegates[index].DynamicInvoke(this, instance, value);
}
else
{
return delegates[index].DynamicInvoke();
}
}
catch (Exception e)
{
if (e is TargetInvocationException)
e = ((TargetInvocationException)e).InnerException;
Debug.LogError(string.Format("Invoking a method from a constructor failed. The exception was \"{0}\".", e.Message));
return null;
}
}
#endregion
public ConstructorAttribute(string methodName)
{
this.methodName = methodName;
}
public ConstructorAttribute(Delegate method)
{
this.delegates.Add(method);
}
}
}
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