private static void ValidateLhs(FromReferenceNode lhs)
{
// make sure the lhs is "assignable"...
if (!lhs.IsResolved)
{
throw new NotSupportedException("cannot validate assignablity of unresolved node");
}
if (lhs.DataType.IsCollectionType)
{
throw new QueryException("collections not assignable in update statements");
}
else if (lhs.DataType.IsComponentType)
{
throw new QueryException("Components currently not assignable in update statements");
}
else if (lhs.DataType.IsEntityType)
{
// currently allowed...
}
// TODO : why aren't these the same?
if (lhs.GetImpliedJoin() != null || lhs.FromElement.IsImplied)
{
throw new QueryException("Implied join paths are not assignable in update statements");
}
}
private IType PrepareLhs()
{
FromReferenceNode lhs = GetLhs();
lhs.PrepareForDot(_propertyName);
return(GetDataType());
}
public override void PrepareForDot(string propertyName)
{
FromElement fromElement = FromElement;
if (fromElement == null)
{
throw new InvalidOperationException("No FROM element for index operator!");
}
IQueryableCollection queryableCollection = fromElement.QueryableCollection;
if (queryableCollection != null && !queryableCollection.IsOneToMany)
{
FromReferenceNode collectionNode = ( FromReferenceNode )GetChild(0);
String path = collectionNode.Path + "[]." + propertyName;
if (Log.IsDebugEnabled)
{
Log.Debug("Creating join for many-to-many elements for " + path);
}
FromElementFactory factory = new FromElementFactory(fromElement.FromClause, fromElement, path);
// This will add the new from element to the origin.
FromElement elementJoin = factory.CreateElementJoin(queryableCollection);
FromElement = elementJoin;
}
}
private void CheckLhsIsNotCollection()
{
FromReferenceNode lhs = GetLhs();
if (lhs.DataType != null && lhs.DataType.IsCollectionType)
{
throw BuildIllegalCollectionDereferenceException(_propertyName, lhs);
}
}
public FromReferenceNode GetLhs()
{
FromReferenceNode lhs = ((FromReferenceNode)GetChild(0));
if (lhs == null)
{
throw new InvalidOperationException("DOT node with no left-hand-side!");
}
return(lhs);
}
public void RecursiveResolve(int level, bool impliedAtRoot, string classAlias, IASTNode parent)
{
IASTNode lhs = GetFirstChild();
int nextLevel = level + 1;
if (lhs != null)
{
FromReferenceNode n = ( FromReferenceNode )lhs;
n.RecursiveResolve(nextLevel, impliedAtRoot, null, this);
}
ResolveFirstChild();
bool impliedJoin = !(level == RootLevel && !impliedAtRoot);
Resolve(true, impliedJoin, classAlias, parent);
}
private void HandleElements(FromReferenceNode collectionNode, String propertyName)
{
FromElement collectionFromElement = collectionNode.FromElement;
IQueryableCollection queryableCollection = collectionFromElement.QueryableCollection;
String path = collectionNode.Path + "[]." + propertyName;
Log.Debug("Creating elements for {0}", path);
_fromElement = collectionFromElement;
if (!collectionFromElement.IsCollectionOfValuesOrComponents)
{
Walker.AddQuerySpaces(queryableCollection.ElementPersister);
}
DataType = queryableCollection.ElementType;
_selectColumns = collectionFromElement.ToColumns(_fromElement.TableAlias, propertyName, _inSelect);
}
private FromElement EvaluateFromElementPath(string path, string classAlias)
{
FromReferenceNode pathNode = (FromReferenceNode)PathHelper.ParsePath(path, _fromClause.ASTFactory);
pathNode.RecursiveResolve(FromReferenceNode.RootLevel, // This is the root level node.
false, // Generate an explicit from clause at the root.
classAlias,
null
);
if (pathNode.GetImpliedJoin() != null)
{
return(pathNode.GetImpliedJoin());
}
else
{
return(pathNode.FromElement);
}
}
public void ResolveCollectionProperty(IASTNode expr)
{
String propertyName = CollectionProperties.GetNormalizedPropertyName(_methodName);
if (expr is FromReferenceNode)
{
FromReferenceNode collectionNode = ( FromReferenceNode )expr;
// If this is 'elements' then create a new FROM element.
if (CollectionPropertyNames.Elements == propertyName)
{
HandleElements(collectionNode, propertyName);
}
else
{
// Not elements(x)
_fromElement = collectionNode.FromElement;
DataType = _fromElement.GetPropertyType(propertyName, propertyName);
_selectColumns = _fromElement.ToColumns(_fromElement.TableAlias, propertyName, _inSelect);
}
if (collectionNode is DotNode)
{
PrepareAnyImplicitJoins(( DotNode )collectionNode);
}
if (!_inSelect)
{
_fromElement.Text = "";
_fromElement.UseWhereFragment = false;
}
PrepareSelectColumns(_selectColumns);
Text = _selectColumns[0];
Type = HqlSqlWalker.SQL_TOKEN;
}
else
{
throw new SemanticException(
"Unexpected expression " + expr +
" found for collection function " + propertyName
);
}
}
public void ResolveSelectExpression()
{
if (Walker.IsShallowQuery || Walker.CurrentFromClause.IsSubQuery)
{
Resolve(false, true);
}
else
{
Resolve(true, false);
IType type = GetDataType();
if (type.IsEntityType)
{
FromElement fromElement = FromElement;
fromElement.IncludeSubclasses = true; // Tell the destination fromElement to 'includeSubclasses'.
if (UseThetaStyleImplicitJoins)
{
fromElement.JoinSequence.SetUseThetaStyle(true); // Use theta style (for regression)
// Move the node up, after the origin node.
FromElement origin = fromElement.Origin;
if (origin != null)
{
ASTUtil.MakeSiblingOfParent(origin, fromElement);
}
}
}
}
FromReferenceNode lhs = GetLhs();
while (lhs != null)
{
CheckSubclassOrSuperclassPropertyReference(lhs, lhs.NextSibling.Text);
lhs = (FromReferenceNode)lhs.GetChild(0);
}
}
public override void Resolve(bool generateJoin, bool implicitJoin, string classAlias, IASTNode parent)
{
if (IsResolved)
{
return;
}
FromReferenceNode collectionNode = ( FromReferenceNode )GetChild(0);
SessionFactoryHelperExtensions sessionFactoryHelper = SessionFactoryHelper;
collectionNode.ResolveIndex(this); // Fully resolve the map reference, create implicit joins.
IType type = collectionNode.DataType;
if (!type.IsCollectionType)
{
throw new SemanticException("The [] operator cannot be applied to type " + type);
}
string collectionRole = (( CollectionType )type).Role;
IQueryableCollection queryableCollection = sessionFactoryHelper.RequireQueryableCollection(collectionRole);
if (!queryableCollection.HasIndex)
{
throw new QueryException("unindexed fromElement before []: " + collectionNode.Path);
}
// Generate the inner join -- The elements need to be joined to the collection they are in.
FromElement fromElement = collectionNode.FromElement;
String elementTable = fromElement.TableAlias;
FromClause fromClause = fromElement.FromClause;
String path = collectionNode.Path;
FromElement elem = fromClause.FindCollectionJoin(path);
if (elem == null)
{
FromElementFactory factory = new FromElementFactory(fromClause, fromElement, path);
elem = factory.CreateCollectionElementsJoin(queryableCollection, elementTable);
if (Log.IsDebugEnabled)
{
Log.Debug("No FROM element found for the elements of collection join path " + path
+ ", created " + elem);
}
}
else
{
if (Log.IsDebugEnabled)
{
Log.Debug("FROM element found for collection join path " + path);
}
}
// The 'from element' that represents the elements of the collection.
FromElement = fromElement;
// Add the condition to the join sequence that qualifies the indexed element.
IASTNode selector = GetChild(1);
if (selector == null)
{
throw new QueryException("No index value!");
}
// Sometimes use the element table alias, sometimes use the... umm... collection table alias (many to many)
String collectionTableAlias = elementTable;
if (elem.CollectionTableAlias != null)
{
collectionTableAlias = elem.CollectionTableAlias;
}
// TODO: get SQL rendering out of here, create an AST for the join expressions.
// Use the SQL generator grammar to generate the SQL text for the index expression.
JoinSequence joinSequence = fromElement.JoinSequence;
string[] indexCols = queryableCollection.IndexColumnNames;
if (indexCols.Length != 1)
{
throw new QueryException("composite-index appears in []: " + collectionNode.Path);
}
SqlGenerator gen = new SqlGenerator(SessionFactoryHelper.Factory, new CommonTreeNodeStream(selector));
try
{
gen.simpleExpr(); //TODO: used to be exprNoParens! was this needed?
}
catch (RecognitionException e)
{
throw new QueryException(e.Message, e);
}
string selectorExpression = gen.GetSQL().ToString();
joinSequence.AddCondition(new SqlString(collectionTableAlias + '.' + indexCols[0] + " = " + selectorExpression));
//joinSequence.AddCondition(collectionTableAlias, new string[] { indexCols[0] }, selectorExpression, false);
IList <IParameterSpecification> paramSpecs = gen.GetCollectedParameters();
if (paramSpecs != null)
{
switch (paramSpecs.Count)
{
case 0:
// nothing to do
break;
case 1:
IParameterSpecification paramSpec = paramSpecs[0];
paramSpec.ExpectedType = queryableCollection.IndexType;
fromElement.SetIndexCollectionSelectorParamSpec(paramSpec);
break;
default:
fromElement.SetIndexCollectionSelectorParamSpec(
new AggregatedIndexCollectionSelectorParameterSpecifications(paramSpecs)
);
break;
}
}
// Now, set the text for this node. It should be the element columns.
String[] elementColumns = queryableCollection.GetElementColumnNames(elementTable);
Text = elementColumns[0];
IsResolved = true;
}
private static void ValidateLhs(FromReferenceNode lhs)
{
// make sure the lhs is "assignable"...
if (!lhs.IsResolved)
{
throw new NotSupportedException("cannot validate assignablity of unresolved node");
}
if (lhs.DataType.IsCollectionType)
{
throw new QueryException("collections not assignable in update statements");
}
else if (lhs.DataType.IsComponentType)
{
throw new QueryException("Components currently not assignable in update statements");
}
else if (lhs.DataType.IsEntityType)
{
// currently allowed...
}
// TODO : why aren't these the same?
if (lhs.GetImpliedJoin() != null || lhs.FromElement.IsImplied)
{
throw new QueryException("Implied join paths are not assignable in update statements");
}
}
private void HandleElements(FromReferenceNode collectionNode, String propertyName)
{
FromElement collectionFromElement = collectionNode.FromElement;
IQueryableCollection queryableCollection = collectionFromElement.QueryableCollection;
String path = collectionNode.Path + "[]." + propertyName;
Log.Debug("Creating elements for " + path);
_fromElement = collectionFromElement;
if (!collectionFromElement.IsCollectionOfValuesOrComponents)
{
Walker.AddQuerySpaces(queryableCollection.ElementPersister.QuerySpaces);
}
DataType = queryableCollection.ElementType;
_selectColumns = collectionFromElement.ToColumns(_fromElement.TableAlias, propertyName, _inSelect);
}
