private static SetInfo CreateSetInfo(Type type, ConstructorInfo constructor)
{
var pro = type.GetProperties();
var ins = (constructor == null) ? Expression.New(type) : Expression.New(constructor);
var inf = new List <KeyValuePair <string, Type> >();
var met = new List <MethodInfo>();
for (int i = 0; i < pro.Length; i++)
{
var cur = pro[i];
var get = cur.GetGetMethod();
var set = cur.GetSetMethod();
if (get == null || set == null)
{
continue;
}
var arg = set.GetParameters();
if (arg == null || arg.Length != 1)
{
continue;
}
inf.Add(new KeyValuePair <string, Type>(cur.Name, cur.PropertyType));
met.Add(set);
}
var exp = new List <Expression>();
var ipt = Expression.Parameter(typeof(object[]), "parameters");
var val = Expression.Variable(type, "value");
var ass = Expression.Assign(val, ins);
exp.Add(ass);
for (int i = 0; i < inf.Count; i++)
{
var idx = Expression.ArrayIndex(ipt, Expression.Constant(i));
var cvt = Expression.Convert(idx, inf[i].Value);
var set = Expression.Call(val, met[i], cvt);
exp.Add(set);
}
var cst = Expression.Convert(val, typeof(object));
exp.Add(cst);
var blk = Expression.Block(new[] { val }, exp);
var del = Expression.Lambda <Func <object[], object> >(blk, ipt);
var res = new SetInfo(inf.ToArray(), del.Compile());
return(res);
}
private static SetInfo CreateSetInfoAnonymousType(Type type)
{
var cts = type.GetConstructors();
if (cts.Length != 1)
{
return(null);
}
var con = cts[0];
var arg = con.GetParameters();
var pro = type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
if (pro.Length != arg.Length)
{
return(null);
}
for (int i = 0; i < pro.Length; i++)
{
if (pro[i].Name != arg[i].Name || pro[i].PropertyType != arg[i].ParameterType)
{
return(null);
}
}
var ipt = Expression.Parameter(typeof(object[]), "parameters");
var arr = new Expression[arg.Length];
var inf = new KeyValuePair <string, Type> [arg.Length];
for (int i = 0; i < arg.Length; i++)
{
var cur = arg[i];
var idx = Expression.ArrayIndex(ipt, Expression.Constant(i));
var cvt = Expression.Convert(idx, cur.ParameterType);
arr[i] = cvt;
inf[i] = new KeyValuePair <string, Type>(cur.Name, cur.ParameterType);
}
// Reference type
var ins = Expression.New(con, arr);
var del = Expression.Lambda <Func <object[], object> >(ins, ipt);
var res = new SetInfo(inf, del.Compile());
return(res);
}
