public static object MakeDeepCopy(object source, Type resultType, Func <string, Traverse, Traverse, object> processor = null, string pathRoot = "")
{
if (source == null)
{
return(null);
}
var type = source.GetType();
if (type.IsPrimitive)
{
return(source);
}
if (type.IsEnum)
{
return(Enum.ToObject(resultType, (int)source));
}
if (type.IsGenericType && resultType.IsGenericType)
{
var addOperation = FirstMethod(resultType, m => m.Name == "Add" && m.GetParameters().Count() == 1);
if (addOperation != null)
{
var addableResult = Activator.CreateInstance(resultType);
var addInvoker = MethodInvoker.GetHandler(addOperation);
var newElementType = resultType.GetGenericArguments()[0];
var i = 0;
foreach (var element in source as IEnumerable)
{
var iStr = (i++).ToString();
var path = pathRoot.Length > 0 ? pathRoot + "." + iStr : iStr;
var newElement = MakeDeepCopy(element, newElementType, processor, path);
addInvoker(addableResult, new object[] { newElement });
}
return(addableResult);
}
// TODO: add dictionaries support
// maybe use methods in Dictionary<KeyValuePair<TKey,TVal>>
}
if (type.IsArray && resultType.IsArray)
{
var elementType = resultType.GetElementType();
var length = ((Array)source).Length;
var arrayResult = Activator.CreateInstance(resultType, new object[] { length }) as object[];
var originalArray = source as object[];
for (var i = 0; i < length; i++)
{
var iStr = i.ToString();
var path = pathRoot.Length > 0 ? pathRoot + "." + iStr : iStr;
arrayResult[i] = MakeDeepCopy(originalArray[i], elementType, processor, path);
}
return(arrayResult);
}
var ns = type.Namespace;
if (ns == "System" || (ns?.StartsWith("System.") ?? false))
{
return(source);
}
var result = CreateInstance(resultType);
Traverse.IterateFields(source, result, (name, src, dst) =>
{
var path = pathRoot.Length > 0 ? pathRoot + "." + name : name;
var value = processor != null ? processor(path, src, dst) : src.GetValue();
dst.SetValue(MakeDeepCopy(value, dst.GetValueType(), processor, path));
});
return(result);
}
public Traverse(Traverse traverse)
{
this.traverse = traverse;
}