static IGetter CreateGetter(Type[] args)
{
switch (args.Length)
{
case 0: return(ReflectionAdapter.CreateInstance(typeof(GetterCore), true) as IGetter);
case 1: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <>).MakeGenericType(args), true) as IGetter);
case 2: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <,>).MakeGenericType(args), true) as IGetter);
case 3: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, ,>).MakeGenericType(args), true) as IGetter);
case 4: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , ,>).MakeGenericType(args), true) as IGetter);
case 5: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , ,>).MakeGenericType(args), true) as IGetter);
case 6: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , ,>).MakeGenericType(args), true) as IGetter);
case 7: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , ,>).MakeGenericType(args), true) as IGetter);
case 8: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 9: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 10: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 11: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 12: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 13: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 14: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 15: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 16: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 17: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 18: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 19: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 20: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 21: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 22: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 23: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 24: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 25: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 26: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 27: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 28: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
case 29: return(ReflectionAdapter.CreateInstance(typeof(GetterCore <, , , , , , , , , , , , , , , , , , , , , , , , , , , ,>).MakeGenericType(args), true) as IGetter);
}
throw new NotSupportedException("The maximum number of methods arguments that can be used is 30.");
}
static object GetMemberObject(MemberExpression exp)
{
var names = new List <string>();
object targt = null;
Type type = null;
//find member root object.
var member = exp;
while (member != null)
{
names.Add(member.Member.Name);
//static method.
if (member.Expression == null)
{
type = member.Member.DeclaringType;
break;
}
var constant = member.Expression as ConstantExpression;
if (constant != null)
{
targt = constant.Value;
type = constant.Type;
break;
}
var method = member.Expression as MethodCallExpression;
if (method != null)
{
type = method.Type;
targt = GetMethodObject(method);
break;
}
var newExp = member.Expression as NewExpression;
if (newExp != null)
{
type = newExp.Type;
targt = GetNewObject(newExp);
break;
}
member = member.Expression as MemberExpression;
}
//name.
var getterName = type.FullName + "@" + string.Join("@", names.ToArray());
//getter.
IGetter getter;
lock (_memberGet)
{
if (!_memberGet.TryGetValue(getterName, out getter))
{
var param = Expression.Parameter(type, "param");
Expression target = param;
names.Reverse();
if (targt == null)
{
target = ReflectionAdapter.StaticPropertyOrField(type, names[0]);
names.RemoveAt(0);
}
if (names.Count == 0)
{
getter = ReflectionAdapter.CreateInstance(typeof(GetterCore), true) as IGetter;
getter.Init(Expression.Convert(target, typeof(object)), new ParameterExpression[0]);
}
else
{
foreach (var e in names)
{
target = Expression.PropertyOrField(target, e);
}
getter = ReflectionAdapter.CreateInstance(typeof(GetterCore <>).MakeGenericType(type), true) as IGetter;
getter.Init(Expression.Convert(target, typeof(object)), new[] { param });
}
_memberGet.Add(getterName, getter);
}
}
return(getter.GetMemberObject(new object[] { targt }));
}