/// <summary>
/// Adds an attribute with given name and type to the class with the given name
/// </summary>
/// <param name="targetClass">The class, we want to add the new attribute to.</param>
/// <param name="myAttributeName">The name of the attribute.</param>
/// <param name="attributeType">The type of the attribute.</param>
/// <returns>Ture, if the attribute could be added to the target class. Else, false. (attribute contained in superclass)</returns>
public Exceptional<ResultType> AddAttributeToType(GraphDBType mytype, TypeAttribute myTypeAttribute)
{
#region check if already initialized
if (GetTypeByUUID(myTypeAttribute.DBTypeUUID) == null)
{
return new Exceptional<ResultType>(new Error_TypeDoesNotExist(myTypeAttribute.DBTypeUUID.ToString()));
}
#endregion
#region Check if any ParentType already have an attribute with this name
foreach (var aType in GetAllParentTypes(mytype, true, true))
{
if (aType.GetTypeAttributeByName(myTypeAttribute.Name) != null)
{
return new Exceptional<ResultType>(new Error_AttributeExistsInSupertype(myTypeAttribute.Name, aType.Name));
}
}
#endregion
#region adapt type
//if we reach this code, no other superclass contains an attribute with this name, so add it!
myTypeAttribute.RelatedGraphDBTypeUUID = mytype.UUID;
if (myTypeAttribute.DefaultValue != null)
{
mytype.AddMandatoryAttribute(myTypeAttribute.UUID, this);
}
mytype.AddAttribute(myTypeAttribute, this, true);
var FlushExcept = FlushType(mytype);
if (FlushExcept.Failed())
return new Exceptional<ResultType>(FlushExcept);
#endregion
#region update lookup tables ob sub-classes
foreach (var aSubType in GetAllSubtypes(mytype, false))
{
aSubType.AttributeLookupTable.Add(myTypeAttribute.UUID, myTypeAttribute);
}
#endregion
return new Exceptional<ResultType>(ResultType.Successful);
}
