protected override string GetJoinCondition(JoinType joinType)
{
if (RelationshipClassUtils.UsesRelationshipTable(_relClass))
{
return(GetBridgeTableJoinCondition(joinType));
}
// deal with non-attributed relationship classes
esriRelCardinality cardinality = _relClass.Cardinality;
switch (cardinality)
{
case esriRelCardinality.esriRelCardinalityOneToOne:
return(GetForeignKeyJoinCondition(joinType));
case esriRelCardinality.esriRelCardinalityOneToMany:
return(GetForeignKeyJoinCondition(joinType));
default:
throw CreateUnsupportedNonAttributedCardinalityException(cardinality);
}
}
private IList <string> GetTableNames(
[NotNull] IRelationshipClass relationshipClass,
[CanBeNull] out IFeatureClass baseFeatureClass,
out int featureClassCount)
{
Assert.ArgumentNotNull(relationshipClass, nameof(relationshipClass));
var result = new List <string>();
IObjectClass originClass = relationshipClass.OriginClass;
IObjectClass destinationClass = relationshipClass.DestinationClass;
var originFeatureClass = originClass as IFeatureClass;
var destinationFeatureClass = destinationClass as IFeatureClass;
featureClassCount = GetInvolvedFeatureClassCount(relationshipClass);
string originClassName = ((IDataset)originClass).Name;
string destClassName = ((IDataset)destinationClass).Name;
string relClassName = ((IDataset)relationshipClass).Name;
esriRelCardinality cardinality = relationshipClass.Cardinality;
if (RelationshipClassUtils.UsesRelationshipTable(relationshipClass))
{
// BUG in 9.3 SP1:
// Geometries get assigned to wrong features if the order in table list
// is not table, bridge-table, featureclass
if (originFeatureClass != null && destinationFeatureClass != null)
{
// if two feature classes are involved, the one that
// the shape field is taken from must be first in the list
baseFeatureClass = destinationFeatureClass;
result.Add(destClassName);
result.Add(relClassName);
result.Add(originClassName);
}
else if (originFeatureClass != null)
{
baseFeatureClass = originFeatureClass;
result.Add(destClassName);
result.Add(relClassName);
result.Add(originClassName);
}
else if (destinationFeatureClass != null)
{
baseFeatureClass = destinationFeatureClass;
result.Add(originClassName);
result.Add(relClassName);
result.Add(destClassName);
}
else
{
// no feature class involved
baseFeatureClass = null;
result.Add(originClassName);
result.Add(relClassName);
result.Add(destClassName);
}
}
else
{
// handle non-attributed relationships (i.e. fk is on destination table)
switch (cardinality)
{
case esriRelCardinality.esriRelCardinalityOneToOne:
case esriRelCardinality.esriRelCardinalityOneToMany:
if (originFeatureClass != null && destinationFeatureClass != null)
{
baseFeatureClass = destinationFeatureClass;
// TODO inverted. Not sure if appropriate for 1:n/1:1 relationships
result.Add(destClassName);
result.Add(originClassName);
}
else if (originFeatureClass != null)
{
baseFeatureClass = originFeatureClass;
result.Add(originClassName);
result.Add(destClassName);
}
else if (destinationFeatureClass != null)
{
baseFeatureClass = destinationFeatureClass;
// TODO inverted. Not sure if appropriate for 1:n/1:1 relationships
result.Add(destClassName);
result.Add(originClassName);
}
else
{
// no feature class is involved
baseFeatureClass = null;
result.Add(originClassName);
result.Add(destClassName);
}
break;
default:
throw CreateUnsupportedNonAttributedCardinalityException(cardinality);
}
}
return(result);
}