public override EvaluatorContext GetNestedContext(object source, string propertyPath)
{
object nestedObject = GetPropertyValue(source, propertyPath, false);
if(nestedObject == null)
return null;
#if !SL
IList list = nestedObject as IList;
if(list == null) {
IListSource listSource = nestedObject as IListSource;
if(listSource != null) {
if(listSource.ContainsListCollection)
list = listSource.GetList();
}
}
object nestedSource;
PropertyDescriptorCollection pdc;
if(list != null && list is ITypedList) {
switch(list.Count) {
case 0:
return null;
default:
throw new ArgumentException("single row expected at '" + propertyPath + "', provided: " + list.Count.ToString());
case 1:
break;
}
nestedSource = list[0];
pdc = ((ITypedList)list).GetItemProperties(null);
} else if(nestedObject is ITypedList) {
nestedSource = nestedObject;
pdc = ((ITypedList)nestedObject).GetItemProperties(null);
} else {
nestedSource = nestedObject;
pdc = null;
}
EvaluatorContextDescriptor descriptor = new EvaluatorContextDescriptorDefault(pdc, nestedSource.GetType());
return new EvaluatorContext(descriptor, nestedSource);
#else
EvaluatorContextDescriptor descriptor = new EvaluatorContextDescriptorDefault(nestedObject.GetType());
return new EvaluatorContext(descriptor, nestedObject);
#endif
}
public override IEnumerable GetCollectionContexts(object source, string collectionName)
{
object collectionSrc = GetPropertyValue(source, collectionName, false);
if(collectionSrc == null)
return null;
IList list = collectionSrc as IList;
#if !SL
if(list == null) {
IListSource listSource = collectionSrc as IListSource;
if(listSource != null)
list = listSource.GetList();
}
if(list == null)
throw new ArgumentException("not a collection: " + collectionName);
EvaluatorContextDescriptor descriptor = null;
ITypedList pdcSrc = list as ITypedList;
if(pdcSrc != null) {
descriptor = new EvaluatorContextDescriptorDefault(pdcSrc.GetItemProperties(null));
}
return new CollectionContexts(descriptor, list);
#else
if(list == null)
throw new ArgumentException("not a collection: " + collectionName);
return new CollectionContexts(null, list);
#endif
}
