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Error in TorqueXmlDeserializer

by Vishal Bhanderi · in Torque X 2D · 09/06/2008 (3:19 am) · 3 replies

Hi guys,

I'm trying to create an object which references other objects within the scene, but attempting to run the game I get a TorqueXmlDeserializer error. What is the problem with the code below?

[TorqueXmlSchemaType]
    public class TestCollectionObject : TorqueComponent
    {
        [TorqueXmlDeserializeInclude]
        [XmlElement(ElementName = "SwitchObjects")]
        private List<ObjectCollectible> switchTypeContainer;

        private class ObjectCollectible
        {
            //The object to change visibilty status
            T2DSceneObject myOwner;

            T2DCollisionImage collisionImage;

            public T2DCollisionImage CollisionImage
            {
                get { return collisionImage; }
                set { collisionImage = value; }
            }

            public T2DSceneObject SceneObject
            {
                get { return myOwner; }
                set { myOwner = value; }
            }
        }
    }

Here is the stack trace:
Unable to create new instance for element CollisionImage on object GarageGames.Torque.PlatformerFramework.TestCollectionObject+ObjectCollectible
---- Assert Long Message ----


    at Assert.Fatal(Boolean condition, String message)  
    at TorqueXmlDeserializer._Error(String message)  
    at TorqueXmlDeserializer._Error(String format, Object[] args)  
    at TorqueXmlDeserializer._SetFieldOrProperty(IFieldOrProperty fieldOrProperty, XmlNode element, Object& o)  
    at TorqueXmlDeserializer._Recurse(XmlNode element, Object& o, TypeInfo ti)  
    at TorqueXmlDeserializer._RecurseList(XmlNode element, DeserializedList& list, TypeInfo ti)  
    at TorqueXmlDeserializer._SetFieldOrProperty(IFieldOrProperty fieldOrProperty, XmlNode element, Object& o)  
    at TorqueXmlDeserializer._Recurse(XmlNode element, Object& o, TypeInfo ti)  
    at TorqueXmlDeserializer._RecurseList(XmlNode element, DeserializedList& list, TypeInfo ti)  
    at TorqueXmlDeserializer._SetFieldOrProperty(IFieldOrProperty fieldOrProperty, XmlNode element, Object& o)  
    at TorqueXmlDeserializer._Recurse(XmlNode element, Object& o, TypeInfo ti)  
    at TorqueXmlDeserializer._RecurseList(XmlNode element, DeserializedList& list, TypeInfo ti)  
    at TorqueXmlDeserializer._SetFieldOrProperty(IFieldOrProperty fieldOrProperty, XmlNode element, Object& o)  
    at TorqueXmlDeserializer._Recurse(XmlNode element, Object& o, TypeInfo ti)  
    at TorqueXmlDeserializer.Process(String levelFile, Object target)  
    at TorqueSceneData.Load(String filename, List'1 extraAssemblies)  
    at TorqueSceneData.Load(String filename)  
    at SceneLoader.Load(String sceneFileName)

Thanks
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Associate John Kanalakis
EnvyGames
#1
09/08/2008 (9:41 pm)
Usually, the de-serializer complains most when there is no default constructor for your class. Looking at the code above, it looks like that's missing. Also, it looks like your component code above might be missing some important methods, like _OnRegister().

John K.

Torque Owner Vishal Bhanderi
#2
09/09/2008 (2:19 pm)
Thanks John for replying. The code above is a strip down of what the full class with the problem still happening. I've managed to narrow it down further. When I change Collision related stuff to:

Object collisionImage;
public Object CollisionImage
            {
                get { return collisionImage; }
                set { collisionImage = value; }
            }

It works fine. Is it some kind of bug? Or have I broke something?

Vishal

Associate John Kanalakis
EnvyGames
#3
09/10/2008 (12:39 am)
Ahhhhh.... Your return type is a generic object. Although that is a completely legal type to use, the Reflection code within Torque X will choke on that, because there is not a strong type to create. Instead of using a generic object type, can you create your own simple class, like this?

public class MyObject
{
MyObject(){} //constructor
public object data; //wrapped generic object type
}

then you can export to Torque X with changes to your code. 

MyObject collisionImage;
 
public MyObject CollisionImage            
{                
get { return collisionImage; }                
set { collisionImage = value; }            
}

Well, something like this... Hopefully that makes sense. Just try avoiding the generic object type.

John K.,