/// <summary>
/// Checks if the given type is assignable to this type. In other words, if this type
/// is a subtype of the given type or not.
/// </summary>
/// <param name="subType">resource type to check.</param>
/// <returns>true, if the given type is assignable to this type. Otherwise returns false.</returns>
internal static bool IsAssignableFrom(this ResourceType thisType, ResourceType subType)
{
CollectionResourceType thisCollectionType = thisType as CollectionResourceType;
CollectionResourceType subCollectionType = subType as CollectionResourceType;
if (thisCollectionType != null && subCollectionType != null)
{
return(thisCollectionType.ItemType.IsAssignableFrom(subCollectionType.ItemType));
}
EntityCollectionResourceType thisEntityCollectionType = thisType as EntityCollectionResourceType;
EntityCollectionResourceType subEntityCollectionType = subType as EntityCollectionResourceType;
if (thisEntityCollectionType != null && subEntityCollectionType != null)
{
return(thisEntityCollectionType.ItemType.IsAssignableFrom(subEntityCollectionType.ItemType));
}
while (subType != null)
{
if (subType == thisType)
{
return(true);
}
subType = subType.BaseType;
}
return(false);
}
// Given a type try to find the resource set.
private ResourceSet GetResourceSet(ResourceType type)
{
if (type == null)
{
return(null);
}
else if (type.ResourceTypeKind == ResourceTypeKind.EntityCollection)
{
EntityCollectionResourceType ecType = type as EntityCollectionResourceType;
return(GetResourceSet(ecType.ItemType));
}
else if (type.ResourceTypeKind == ResourceTypeKind.EntityType)
{
var set = _metadata.ResourceSets.SingleOrDefault(rs => rs.ResourceType == type);
if (set != null)
{
return(set);
}
else if (type.BaseType != null)
{
return(GetResourceSet(type.BaseType));
}
}
return(null);
}