static Func <ListTreeNode <T>, U> GetCreator()
{
var t = typeof(U);
if (t.IsArray)
{
var mi = typeof(GenericConstructor <T, U>).GetMethod("ArrayCreator",
BindingFlags.NonPublic | BindingFlags.Static);
var g = mi.MakeGenericMethod(t.GetElementType());
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(g));
}
{
return(_s =>
{
return Activator.CreateInstance <U>();
});
}
}
static Func <ListTreeNode <T>, U> GetDeserializer()
{
// primitive
{
var mi = typeof(T).GetMethods()
.Where(x => x.Name.StartsWith("Get"))
.FirstOrDefault(IsPrimitiveDeserializer)
;
if (mi != null)
{
var getter = GenericInvokeCallFactory.OpenFunc <T, U>(mi);
return(s => getter(s.Value));
}
}
var target = typeof(U);
if (target.IsArray)
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("GenericArrayDeserializer",
BindingFlags.Static | BindingFlags.Public);
var g = mi.MakeGenericMethod(target.GetElementType());
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(g));
}
if (target.IsGenericType)
{
if (target.GetGenericTypeDefinition() == typeof(List <>))
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("GenericListDeserializer",
BindingFlags.Static | BindingFlags.Public);
var g = mi.MakeGenericMethod(target.GetGenericArguments());
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(g));
}
if (target == typeof(Dictionary <string, object>))
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("DefaultDictionaryDeserializer",
BindingFlags.Static | BindingFlags.Public);
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(mi));
}
else
if (target.GetGenericTypeDefinition() == typeof(Dictionary <,>) &&
target.GetGenericArguments()[0] == typeof(string))
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("DictionaryDeserializer",
BindingFlags.Static | BindingFlags.Public);
var g = mi.MakeGenericMethod(target.GetGenericArguments()[1]);
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(g));
}
if (target.GetGenericTypeDefinition() == typeof(Nullable <>))
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("GenericNullableDeserializer",
BindingFlags.Static | BindingFlags.Public);
var g = mi.MakeGenericMethod(target.GetGenericArguments());
return(GenericInvokeCallFactory.StaticFunc <ListTreeNode <T>, U>(g));
}
}
if (target.IsEnum)
{
var value = Expression.Parameter(typeof(int), "value");
var cast = Expression.Convert(value, target);
var func = Expression.Lambda(cast, value);
var compiled = (Func <int, U>)func.Compile();
return(s =>
{
if (s.IsString())
{
return (U)Enum.Parse(typeof(U), s.GetString(), true);
}
else
{
return compiled(s.GetInt32());
}
});
}
// reflection
{
var fields = target.GetFields(BindingFlags.Instance | BindingFlags.Public);
var fieldDeserializers = fields.ToDictionary(x => Utf8String.From(x.Name), x =>
{
var mi = typeof(GenericDeserializer <T, U>).GetMethod("GetFieldDeserializer",
BindingFlags.Static | BindingFlags.NonPublic);
var g = mi.MakeGenericMethod(x.FieldType);
return((FieldSetter)g.Invoke(null, new object[] { x }));
});
return(s =>
{
if (!s.IsMap())
{
throw new ArgumentException(s.Value.ValueType.ToString());
}
var t = (object)default(GenericConstructor <T, U>).Create(s);
foreach (var kv in s.ObjectItems())
{
FieldSetter setter;
if (fieldDeserializers.TryGetValue(kv.Key.GetUtf8String(), out setter))
{
setter(kv.Value, t);
}
}
return (U)t;
});
}
}
