public override void Resolve(bool generateJoin, bool implicitJoin, string classAlias, IASTNode parent)
{
// If this dot has already been resolved, stop now.
if (IsResolved)
{
return;
}
IType propertyType = PrepareLhs(); // Prepare the left hand side and get the data type.
// If there is no data type for this node, and we're at the end of the path (top most dot node), then
// this might be a Java constant.
if (propertyType == null)
{
if (parent == null)
{
Walker.LiteralProcessor.LookupConstant(this);
}
// If the propertyType is null and there isn't a parent, just
// stop now... there was a problem resolving the node anyway.
return;
}
if (propertyType.IsComponentType)
{
// The property is a component...
CheckLhsIsNotCollection();
DereferenceComponent(parent);
InitText();
}
else if (propertyType.IsEntityType)
{
// The property is another class..
CheckLhsIsNotCollection();
DereferenceEntity(( EntityType )propertyType, implicitJoin, classAlias, generateJoin, parent);
InitText();
}
else if (propertyType.IsCollectionType)
{
// The property is a collection...
CheckLhsIsNotCollection();
DereferenceCollection((CollectionType)propertyType, implicitJoin, false, classAlias);
}
else
{
// Otherwise, this is a primitive type.
if (!CollectionProperties.IsAnyCollectionProperty(_propertyName))
{
CheckLhsIsNotCollection();
}
_dereferenceType = DerefPrimitive;
InitText();
}
IsResolved = true;
}
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.
}
