///-------------------------------------------------------------------------------------------------
/// <summary>
/// Enumerates handle in this collection.
/// </summary>
/// <param name="domainModel">
/// The domain model.
/// </param>
/// <param name="event">
/// The event.
/// </param>
/// <returns>
/// An enumerator that allows foreach to be used to process handle in this collection.
/// </returns>
///-------------------------------------------------------------------------------------------------
public IEnumerable <IDomainCommand> Handle(IDomainModel domainModel, RemoveRelationshipEvent @event)
{
Contract.Requires(domainModel, "domainModel");
Contract.Requires(@event, "@event");
var mel = domainModel.GetRelationship(@event.Id);
if (mel != null)
{
yield return(new RemoveRelationshipCommand(mel));
}
}
private void ReadRelationships()
{
if (_reader.LocalName == "relationships")
{
string elem = ReadNextElement();
while (elem == "relationship")
{
var id = ReadId("id");
var deleted = ReadAttribute("deleted", false);
if (deleted == "true")
{
var cmd = new Hyperstore.Modeling.Commands.RemoveRelationshipCommand(_domain, id, false);
Session.Current.Execute(cmd);
elem = ReadNextElement();
continue;
}
var metadata = ReadAttribute("schema");
var schema = GetSchemaFromMoniker(metadata) as ISchemaRelationship;
if (schema == null)
{
throw new MetadataNotFoundException(String.Format("Invalid metadata {0} for relationship {1}", metadata, id));
}
var startId = ReadId("start");
var endId = ReadId("end");
IModelRelationship entity = null;
if (_allowElementOverriding)
{
entity = _domain.GetRelationship(id);
}
if (entity == null)
{
entity = _domain.CreateRelationship(schema, startId, endId, id);
}
elem = ReadProperties(entity, schema);
}
}
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// Enumerates handle in this collection.
/// </summary>
/// <exception cref="InvalidElementException">
/// Thrown when an Invalid Element error condition occurs.
/// </exception>
/// <param name="domainModel">
/// The domain model.
/// </param>
/// <param name="event">
/// The event.
/// </param>
/// <returns>
/// An enumerator that allows foreach to be used to process handle in this collection.
/// </returns>
///-------------------------------------------------------------------------------------------------
public IEnumerable <IDomainCommand> Handle(IDomainModel domainModel, AddSchemaRelationshipEvent @event)
{
Contract.Requires(domainModel, "domainModel");
Contract.Requires(@event, "@event");
var metadata = domainModel.Store.GetSchemaRelationship(@event.SchemaId);
if (domainModel.GetRelationship(@event.Id) == null)
{
var start = domainModel.Store.GetSchemaElement(@event.StartId);
if (start == null)
{
throw new InvalidElementException(@event.StartId);
}
var end = domainModel.Store.GetSchemaElement(@event.EndId);
if (end == null)
{
throw new InvalidElementException(@event.EndId);
}
yield return(new AddSchemaRelationshipCommand(domainModel as ISchema, @event.Id, metadata, start, end));
}
}