/// <summary>
///
/// </summary>
/// <param name="q"></param>
/// <returns></returns>
public string AddFromCollection( QueryTranslator q )
{
IType collectionElementType = PropertyType;
if( collectionElementType == null )
{
throw new QueryException( string.Format( "must specify 'elements' for collection valued property in from clause: {0}", path ) );
}
if( collectionElementType.IsEntityType )
{
// an association
IQueryableCollection collectionPersister = q.GetCollectionPersister( collectionRole );
IQueryable entityPersister = (IQueryable) collectionPersister.ElementPersister;
System.Type clazz = entityPersister.MappedClass;
string[] collectionElementColumns = CurrentColumns();
string elementName;
if ( collectionPersister.IsOneToMany )
{
elementName = collectionName;
// allow index() function
q.DecoratePropertyMapping( elementName, collectionPersister );
}
else
{
// many to many
q.AddCollection( collectionName, collectionRole );
elementName = q.CreateNameFor( clazz );
string[] keyColumnNames = entityPersister.IdentifierColumnNames;
join.AddJoin( entityPersister.TableName, elementName, collectionElementColumns, keyColumnNames, joinType );
}
q.AddFrom( elementName, clazz, join );
currentPropertyMapping = new CollectionPropertyMapping( collectionPersister );
return elementName;
}
else
{
// collection of values
q.AddFromCollection( collectionName, collectionRole, join );
return collectionName;
}
}