public override void SetValue(TEntity entity, object value)
{
// The base.GetValue gets the entityReference<TEntity> class
var entityCollection = base.GetValue(entity) as IEntitySource;
// The The foreign key mapping comes from the value passed to this method
IForeignKeyMapping foreignKeyMapping = (IForeignKeyMapping)value;
var entityCollectionType = foreignKeyMapping.ForeignKeyProperty.DeclaringType;
// TJT: Clean the EntitySet access up!
var entitySetSource = _entityMapping.Model.DataContext.EntitySets[entityCollectionType];
var keyName = foreignKeyMapping.ForeignKeyProperty.Name;
var keyValue = _entityMapping.GetColumn(entity, foreignKeyMapping.ReferenceKeyProperty.Name);
if (!entityCollection.HasSource)
{
entityCollection.SetSource(entitySetSource, keyName, keyValue);
}
else
{
throw new InvalidOperationException("Entity reference source already set.");
}
}
public void RegisterForeignKeyMapping <TParentEntity, TChildEntity>(
IForeignKeyMapping <TParentEntity, TChildEntity> mapping)
where TParentEntity : IDomainObject
where TChildEntity : IDomainObject
{
string parentName = typeof(TParentEntity).FullName;
if (!_foreignKeMapping.ContainsKey(parentName))
{
_foreignKeMapping.Add(parentName, new Dictionary <string, object>());
}
IDictionary <string, object> maps = _foreignKeMapping[parentName];
string childName = typeof(TChildEntity).FullName;
if (!maps.ContainsKey(childName))
{
maps.Add(childName, mapping);
}
}
public IList <TChildEntity> GetForeignKeyValues <TParentEntity, TChildEntity>(TParentEntity entity)
where TParentEntity : IDomainObject
where TChildEntity : IDomainObject
{
string parentName = typeof(TParentEntity).FullName;
if (!_foreignKeMapping.ContainsKey(parentName))
{
throw new ArgumentException(string.Format("Foreign key mapping associated to parent type '{0}' does not exists", parentName));
}
IDictionary <string, object> maps = _foreignKeMapping[parentName];
string childName = typeof(TChildEntity).FullName;
if (!maps.ContainsKey(childName))
{
throw new ArgumentException(string.Format("Foreign key mapping associated to child type '{0}' does not exists", childName));
}
IForeignKeyMapping <TParentEntity, TChildEntity> fkMapping = (IForeignKeyMapping <TParentEntity, TChildEntity>)maps[childName];
return(fkMapping.GetChildEntities(entity));
}
