/// <summary>
/// 得到构造函数委托
/// </summary>
/// <param name="constructor">构造函数</param>
/// <returns>返回构造函数委托</returns>
public static ConstructorHandler GetCreator(this System.Reflection.ConstructorInfo constructor)
{
Guard.NotNull(constructor, "constructor");
ConstructorHandler ctor = constructor.DeclaringType.IsValueType ?
(args) => constructor.Invoke(args)
: DefaultDynamicMethodFactory.CreateConstructorMethod(constructor);
ConstructorHandler handler = args =>
{
if (args == null)
{
args = new object[constructor.GetParameters().Length];
}
try
{
return(ctor(args));
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
catch (Exception ex)
{
throw ex;
}
};
return(handler);
}
private static object ToEntityRef <T>(IEnumerable <T> items)
{
var entityRefType = EntityRefType.MakeGenericType(typeof(T));
var key = entityRefType.TypeHandle.Value.GetHashCode();
ConstructorHandler ctor = null;
if (!EntityRefCtorCache.TryGetValue(key, out ctor))
{
ctor = entityRefType.GetConstructor(new Type[] { typeof(T) }).GetCreator();;
lock (EntityRefCtorCache)
EntityRefCtorCache[key] = ctor;
}
var entityRef = ctor(items.FirstOrDefault());
return(entityRef);
}
public IBinding WithFactory(ConstructorHandler constructorHandler)
{
Factory = constructorHandler;
return(this);
}