private static void RenderNonScalarProperties(ASTAppender appender, FromElement fromElement, int nonscalarSize, int k)
{
string text = fromElement.RenderPropertySelect(nonscalarSize, k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
if (fromElement.QueryableCollection != null && fromElement.IsFetch)
{
text = fromElement.RenderCollectionSelectFragment(nonscalarSize, k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
// Look through the FromElement's children to find any collections of values that should be fetched...
ASTIterator iter = new ASTIterator(fromElement);
foreach (FromElement child in iter)
{
if (child.IsCollectionOfValuesOrComponents && child.IsFetch)
{
// Need a better way to define the suffixes here...
text = child.RenderValueCollectionSelectFragment(nonscalarSize, nonscalarSize + k);
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
}
}
private void RenderNonScalarIdentifiers(FromElement fromElement, int nonscalarSize, int j, ISelectExpression expr, ASTAppender appender)
{
string text = fromElement.RenderIdentifierSelect(nonscalarSize, j);
if (!fromElement.FromClause.IsSubQuery)
{
if (!_scalarSelect && !Walker.IsShallowQuery)
{
//TODO: is this a bit ugly?
expr.Text = text;
}
else
{
appender.Append(HqlSqlWalker.SQL_TOKEN, text, false);
}
}
}
/// <summary>
/// Prepares a derived (i.e., not explicitly defined in the query) select clause.
/// </summary>
/// <param name="fromClause">The from clause to which this select clause is linked.</param>
public void InitializeDerivedSelectClause(FromClause fromClause)
{
if (_prepared)
{
throw new InvalidOperationException("SelectClause was already prepared!");
}
//Used to be tested by the TCK but the test is no longer here
// if ( getSessionFactoryHelper().isStrictJPAQLComplianceEnabled() && !getWalker().isSubQuery() ) {
// // NOTE : the isSubQuery() bit is a temporary hack...
// throw new QuerySyntaxException( "JPA-QL compliance requires select clause" );
// }
IList<IASTNode> fromElements = fromClause.GetProjectionList();
ASTAppender appender = new ASTAppender(ASTFactory, this); // Get ready to start adding nodes.
int size = fromElements.Count;
List<IType> sqlResultTypeList = new List<IType>(size);
List<IType> queryReturnTypeList = new List<IType>(size);
int k = 0;
foreach (FromElement fromElement in fromElements)
{
IType type = fromElement.SelectType;
AddCollectionFromElement(fromElement);
if (type != null)
{
bool collectionOfElements = fromElement.IsCollectionOfValuesOrComponents;
if (!collectionOfElements)
{
if (!fromElement.IsFetch)
{
// Add the type to the list of returned sqlResultTypes.
queryReturnTypeList.Add(type);
}
_fromElementsForLoad.Add(fromElement);
sqlResultTypeList.Add(type);
// Generate the select expression.
string text = fromElement.RenderIdentifierSelect(size, k);
SelectExpressionImpl generatedExpr = (SelectExpressionImpl)appender.Append(HqlSqlWalker.SELECT_EXPR, text, false);
if (generatedExpr != null)
{
generatedExpr.FromElement = fromElement;
}
}
}
k++;
}
// Get all the select expressions (that we just generated) and render the select.
ISelectExpression[] selectExpressions = CollectSelectExpressions();
if (Walker.IsShallowQuery)
{
RenderScalarSelects(selectExpressions, fromClause);
}
else
{
RenderNonScalarSelects(selectExpressions, fromClause);
}
FinishInitialization( /*sqlResultTypeList,*/ queryReturnTypeList);
}
private void RenderNonScalarSelects(ISelectExpression[] selectExpressions, FromClause currentFromClause)
{
ASTAppender appender = new ASTAppender(ASTFactory, this);
int size = selectExpressions.Length;
int nonscalarSize = 0;
for (int i = 0; i < size; i++)
{
if (!selectExpressions[i].IsScalar)
{
nonscalarSize++;
}
}
int j = 0;
for (int i = 0; i < size; i++)
{
if (!selectExpressions[i].IsScalar)
{
ISelectExpression expr = selectExpressions[i];
FromElement fromElement = expr.FromElement;
if (fromElement != null)
{
RenderNonScalarIdentifiers(fromElement, nonscalarSize, j, expr, appender);
j++;
}
}
}
if (!currentFromClause.IsSubQuery)
{
// Generate the property select tokens.
int k = 0;
for (int i = 0; i < size; i++)
{
if (!selectExpressions[i].IsScalar)
{
FromElement fromElement = selectExpressions[i].FromElement;
if (fromElement != null)
{
RenderNonScalarProperties(appender, fromElement, nonscalarSize, k);
k++;
}
}
}
}
}
/// <summary>
/// Prepares an explicitly defined select clause.
/// </summary>
/// <param name="fromClause">The from clause linked to this select clause.</param>
/// <exception cref="SemanticException"></exception>
public void InitializeExplicitSelectClause(FromClause fromClause)
{
if (_prepared)
{
throw new InvalidOperationException("SelectClause was already prepared!");
}
//explicit = true; // This is an explict Select.
//ArrayList sqlResultTypeList = new ArrayList();
List<IType> queryReturnTypeList = new List<IType>();
// First, collect all of the select expressions.
// NOTE: This must be done *before* invoking setScalarColumnText() because setScalarColumnText()
// changes the AST!!!
ISelectExpression[] selectExpressions = CollectSelectExpressions();
for (int i = 0; i < selectExpressions.Length; i++)
{
ISelectExpression expr = selectExpressions[i];
if (expr.IsConstructor)
{
_constructorNode = (ConstructorNode)expr;
IList<IType> constructorArgumentTypeList = _constructorNode.ConstructorArgumentTypeList;
//sqlResultTypeList.addAll( constructorArgumentTypeList );
queryReturnTypeList.AddRange(constructorArgumentTypeList);
_scalarSelect = true;
for (int j = 1; j < _constructorNode.ChildCount; j++)
{
ISelectExpression se = _constructorNode.GetChild(j) as ISelectExpression;
if (se != null && IsReturnableEntity(se))
{
_fromElementsForLoad.Add(se.FromElement);
}
}
}
else
{
IType type = expr.DataType;
if (type == null && !(expr is ParameterNode))
{
throw new QueryException("No data type for node: " + expr.GetType().Name + " " + new ASTPrinter().ShowAsString((IASTNode)expr, ""));
}
//sqlResultTypeList.add( type );
// If the data type is not an association type, it could not have been in the FROM clause.
if (expr.IsScalar)
{
_scalarSelect = true;
}
if (IsReturnableEntity(expr))
{
_fromElementsForLoad.Add(expr.FromElement);
}
// Always add the type to the return type list.
queryReturnTypeList.Add(type);
}
}
//init the aliases, after initing the constructornode
InitAliases(selectExpressions);
if (!Walker.IsShallowQuery)
{
// add the fetched entities
IList<IASTNode> fromElements = fromClause.GetProjectionList();
ASTAppender appender = new ASTAppender(ASTFactory, this); // Get ready to start adding nodes.
int size = fromElements.Count;
int k = 0;
foreach (FromElement fromElement in fromElements)
{
if (fromElement.IsFetch)
{
FromElement origin;
if (fromElement.RealOrigin == null)
{
// work around that crazy issue where the tree contains
// "empty" FromElements (no text); afaict, this is caused
// by FromElementFactory.createCollectionJoin()
if (fromElement.Origin == null)
{
throw new QueryException("Unable to determine origin of join fetch [" + fromElement.GetDisplayText() + "]");
}
origin = fromElement.Origin;
}
else
{
origin = fromElement.RealOrigin;
}
// Only perform the fetch if its owner is included in the select
if (!_fromElementsForLoad.Contains(origin))
{
// NH-2846: Before 2012-01-18, we threw this exception. However, some
// components using LINQ (e.g. paging) like to automatically append e.g. Count(). It
// can then be difficult to avoid having a bogus fetch statement, so just ignore those.
// An alternative solution may be to have the linq provider filter out the fetch instead.
// throw new QueryException(string.Format(JoinFetchWithoutOwnerExceptionMsg, fromElement.GetDisplayText()));
//throw away the fromElement. It's clearly redundant.
fromElement.Parent.RemoveChild(fromElement);
}
else
{
IType type = fromElement.SelectType;
AddCollectionFromElement(fromElement);
if (type != null)
{
bool collectionOfElements = fromElement.IsCollectionOfValuesOrComponents;
if (!collectionOfElements)
{
// Add the type to the list of returned sqlResultTypes.
fromElement.IncludeSubclasses = true;
_fromElementsForLoad.Add(fromElement);
//sqlResultTypeList.add( type );
// Generate the select expression.
String text = fromElement.RenderIdentifierSelect(size, k);
SelectExpressionImpl generatedExpr = (SelectExpressionImpl)appender.Append(HqlSqlWalker.SELECT_EXPR, text, false);
if (generatedExpr != null)
{
generatedExpr.FromElement = fromElement;
}
}
}
}
}
k++;
}
// generate id select fragment and then property select fragment for
// each expression, just like generateSelectFragments().
RenderNonScalarSelects(CollectSelectExpressions(true), fromClause);
}
if (_scalarSelect || Walker.IsShallowQuery)
{
// If there are any scalars (non-entities) selected, render the select column aliases.
RenderScalarSelects(selectExpressions, fromClause);
}
FinishInitialization( /*sqlResultTypeList,*/ queryReturnTypeList);
}
private void RenderNonScalarSelects(ISelectExpression[] selectExpressions, FromClause currentFromClause)
{
var appender = new ASTAppender(ASTFactory, this);
var nonscalarSize = selectExpressions.Count(e => !e.IsScalar);
int j = 0;
foreach (var e in selectExpressions)
{
if (!e.IsScalar)
{
FromElement fromElement = e.FromElement;
if (fromElement != null)
{
RenderNonScalarIdentifiers(fromElement, nonscalarSize, j, e, appender);
j++;
}
}
}
if (!currentFromClause.IsSubQuery)
{
// Generate the property select tokens.
int k = 0;
foreach (var e in selectExpressions)
{
if (!e.IsScalar)
{
FromElement fromElement = e.FromElement;
if (fromElement != null)
{
RenderNonScalarProperties(appender, fromElement, nonscalarSize, k);
k++;
}
}
}
}
}
