public override void ResolveIndex(IASTNode parent)
{
// An ident node can represent an index expression if the ident
// represents a naked property ref
// *Note: this makes the assumption (which is currently the case
// in the hql-sql grammar) that the ident is first resolved
// itself (addrExpr -> resolve()). The other option, if that
// changes, is to call resolve from here; but it is
// currently un-needed overhead.
if (!(IsResolved && _nakedPropertyRef))
{
throw new InvalidOperationException();
}
string propertyName = OriginalText;
if (!DataType.IsCollectionType)
{
throw new SemanticException("Collection expected; [" + propertyName + "] does not refer to a collection property");
}
// TODO : most of below was taken verbatim from DotNode; should either delegate this logic or super-type it
CollectionType type = (CollectionType)DataType;
string role = type.Role;
IQueryableCollection queryableCollection = SessionFactoryHelper.RequireQueryableCollection(role);
string columnTableAlias = FromElement.TableAlias;
FromElementFactory factory = new FromElementFactory(
Walker.CurrentFromClause,
FromElement,
propertyName,
null,
FromElement.ToColumns(columnTableAlias, propertyName, false),
true
);
FromElement elem = factory.CreateCollection(queryableCollection, role, JoinType.InnerJoin, false, true);
FromElement = elem;
Walker.AddQuerySpaces(queryableCollection.CollectionSpaces); // Always add the collection's query spaces.
}
private void DereferenceCollection(CollectionType collectionType, bool implicitJoin, bool indexed, string classAlias)
{
_dereferenceType = DerefCollection;
string role = collectionType.Role;
//foo.bars.size (also handles deprecated stuff like foo.bars.maxelement for backwardness)
IASTNode sibling = NextSibling;
bool isSizeProperty = sibling != null && CollectionProperties.IsAnyCollectionProperty(sibling.Text);
if (isSizeProperty)
{
indexed = true; //yuck!}
}
IQueryableCollection queryableCollection = SessionFactoryHelper.RequireQueryableCollection(role);
string propName = Path;
FromClause currentFromClause = Walker.CurrentFromClause;
if (Walker.StatementType != HqlSqlWalker.SELECT && indexed && classAlias == null)
{
// should indicate that we are processing an INSERT/UPDATE/DELETE
// query with a subquery implied via a collection property
// function. Here, we need to use the table name itself as the
// qualification alias.
// TODO : verify this works for all databases...
// TODO : is this also the case in non-"indexed" scenarios?
string alias = GetLhs().FromElement.Queryable.TableName;
_columns = FromElement.ToColumns(alias, _propertyPath, false, true);
}
//We do not look for an existing join on the same path, because
//it makes sense to join twice on the same collection role
FromElementFactory factory = new FromElementFactory(
currentFromClause,
GetLhs().FromElement,
propName,
classAlias,
GetColumns(),
implicitJoin
);
FromElement elem = factory.CreateCollection(queryableCollection, role, _joinType, _fetch, indexed);
if (Log.IsDebugEnabled)
{
Log.Debug("dereferenceCollection() : Created new FROM element for " + propName + " : " + elem);
}
SetImpliedJoin(elem);
FromElement = elem; // This 'dot' expression now refers to the resulting from element.
if (isSizeProperty)
{
elem.Text = "";
elem.UseWhereFragment = false;
}
if (!implicitJoin)
{
IEntityPersister entityPersister = elem.EntityPersister;
if (entityPersister != null)
{
Walker.AddQuerySpaces(entityPersister.QuerySpaces);
}
}
Walker.AddQuerySpaces(queryableCollection.CollectionSpaces); // Always add the collection's query spaces.
}
public ScalarCollectionCriteriaInfoProvider(SessionFactoryHelper helper, String role)
{
this.role = role;
this.helper = helper;
this.persister = helper.RequireQueryableCollection(role);
}