private static void AddImpliedFromToFromNode(IASTNode fromClause, string collectionRole, ISessionFactoryImplementor factory)
{
SessionFactoryHelperExtensions _sessionFactoryHelper = new SessionFactoryHelperExtensions(factory);
IQueryableCollection persister = _sessionFactoryHelper.GetCollectionPersister(collectionRole);
IType collectionElementType = persister.ElementType;
if (!collectionElementType.IsEntityType)
{
throw new QueryException("collection of values in filter: this");
}
string collectionElementEntityName = persister.ElementPersister.EntityName;
ITreeAdaptor adaptor = new ASTTreeAdaptor();
IASTNode fromElement = (IASTNode)adaptor.Create(HqlParser.FILTER_ENTITY, collectionElementEntityName);
IASTNode alias = (IASTNode)adaptor.Create(HqlParser.ALIAS, "this");
fromClause.AddChild(fromElement);
fromClause.AddChild(alias);
// Show the modified AST.
if (log.IsDebugEnabled())
{
log.Debug("AddImpliedFormToFromNode() : Filter - Added 'this' as a from element...");
}
}
private static void AddImpliedFromToFromNode(IASTNode fromClause, string collectionRole, ISessionFactoryImplementor factory)
{
SessionFactoryHelperExtensions _sessionFactoryHelper = new SessionFactoryHelperExtensions(factory);
IQueryableCollection persister = _sessionFactoryHelper.GetCollectionPersister(collectionRole);
IType collectionElementType = persister.ElementType;
if (!collectionElementType.IsEntityType)
{
throw new QueryException("collection of values in filter: this");
}
string collectionElementEntityName = persister.ElementPersister.EntityName;
ITreeAdaptor adaptor = new ASTTreeAdaptor();
IASTNode fromElement = (IASTNode)adaptor.Create(HqlParser.FILTER_ENTITY, collectionElementEntityName);
IASTNode alias = (IASTNode)adaptor.Create(HqlParser.ALIAS, "this");
fromClause.AddChild(fromElement);
fromClause.AddChild(alias);
// Show the modified AST.
if (log.IsDebugEnabled)
{
log.Debug("AddImpliedFormToFromNode() : Filter - Added 'this' as a from element...");
}
}
void PrepareFromClauseInputTree(IASTNode fromClauseInput, ITreeNodeStream input)
{
if (IsFilter())
{
// Handle collection-fiter compilation.
// IMPORTANT NOTE: This is modifying the INPUT (HQL) tree, not the output tree!
IQueryableCollection persister = _sessionFactoryHelper.GetCollectionPersister(_collectionFilterRole);
IType collectionElementType = persister.ElementType;
if (!collectionElementType.IsEntityType)
{
throw new QueryException("collection of values in filter: this");
}
string collectionElementEntityName = persister.ElementPersister.EntityName;
IASTNode fromElement = (IASTNode)adaptor.Create(FILTER_ENTITY, collectionElementEntityName);
IASTNode alias = (IASTNode)adaptor.Create(ALIAS, "this");
((HqlSqlWalkerTreeNodeStream)input).InsertChild(fromClauseInput, fromElement);
((HqlSqlWalkerTreeNodeStream)input).InsertChild(fromClauseInput, alias);
// fromClauseInput.AddChild(fromElement);
// fromClauseInput.AddChild(alias);
// Show the modified AST.
if (log.IsDebugEnabled)
{
log.Debug("prepareFromClauseInputTree() : Filter - Added 'this' as a from element...");
}
// Create a parameter specification for the collection filter...
IType collectionFilterKeyType = _sessionFactoryHelper.RequireQueryableCollection(_collectionFilterRole).KeyType;
ParameterNode collectionFilterKeyParameter = (ParameterNode)adaptor.Create(PARAM, "?");
CollectionFilterKeyParameterSpecification collectionFilterKeyParameterSpec = new CollectionFilterKeyParameterSpecification(
_collectionFilterRole, collectionFilterKeyType, _positionalParameterCount++
);
collectionFilterKeyParameter.HqlParameterSpecification = collectionFilterKeyParameterSpec;
_parameters.Add(collectionFilterKeyParameterSpec);
}
}
IASTNode CreateFromFilterElement(IASTNode filterEntity, IASTNode alias)
{
var fromElementFound = true;
var fromElement = _currentFromClause.GetFromElement(alias.Text) ??
_currentFromClause.GetFromElementByClassName(filterEntity.Text);
if (fromElement == null)
{
fromElementFound = false;
fromElement = _currentFromClause.AddFromElement(filterEntity.Text, alias);
}
FromClause fromClause = fromElement.FromClause;
IQueryableCollection persister = _sessionFactoryHelper.GetCollectionPersister(_collectionFilterRole);
// Get the names of the columns used to link between the collection
// owner and the collection elements.
String[] keyColumnNames = persister.KeyColumnNames;
String fkTableAlias = persister.IsOneToMany
? fromElement.TableAlias
: fromClause.AliasGenerator.CreateName(_collectionFilterRole);
JoinSequence join = _sessionFactoryHelper.CreateJoinSequence();
join.SetRoot(persister, fkTableAlias);
if (!persister.IsOneToMany)
{
join.AddJoin((IAssociationType)persister.ElementType,
fromElement.TableAlias,
JoinType.InnerJoin,
persister.GetElementColumnNames(fkTableAlias));
}
join.AddCondition(fkTableAlias, keyColumnNames, " = ", true);
fromElement.JoinSequence = join;
fromElement.Filter = true;
if (log.IsDebugEnabled())
{
log.Debug("createFromFilterElement() : processed filter FROM element.");
}
if (fromElementFound)
{
return((IASTNode)adaptor.Nil());
}
return(fromElement);
}
