public static void WalkStreamSpecs(StatementSpecRaw spec, ExprNodeSubselectDeclaredDotVisitor visitor)
{
// Determine filter streams
foreach (StreamSpecRaw rawSpec in spec.StreamSpecs)
{
if (rawSpec is FilterStreamSpecRaw)
{
FilterStreamSpecRaw raw = (FilterStreamSpecRaw)rawSpec;
foreach (ExprNode filterExpr in raw.RawFilterSpec.FilterExpressions)
{
filterExpr.Accept(visitor);
}
}
if (rawSpec is PatternStreamSpecRaw)
{
PatternStreamSpecRaw patternStreamSpecRaw = (PatternStreamSpecRaw)rawSpec;
EvalNodeAnalysisResult analysisResult = EvalNodeUtil.RecursiveAnalyzeChildNodes(patternStreamSpecRaw.EvalFactoryNode);
foreach (EvalFactoryNode evalNode in analysisResult.ActiveNodes)
{
if (evalNode is EvalFilterFactoryNode)
{
EvalFilterFactoryNode filterNode = (EvalFilterFactoryNode)evalNode;
foreach (ExprNode filterExpr in filterNode.RawFilterSpec.FilterExpressions)
{
filterExpr.Accept(visitor);
}
}
}
}
}
}
private static void AddFilters(StreamSpecCompiled[] streams, IList <FilterSpecCompiled> filters, IList <NamedWindowConsumerStreamSpec> namedWindows)
{
foreach (StreamSpecCompiled compiled in streams)
{
if (compiled is FilterStreamSpecCompiled)
{
FilterStreamSpecCompiled c = (FilterStreamSpecCompiled)compiled;
filters.Add(c.FilterSpec);
}
if (compiled is PatternStreamSpecCompiled)
{
PatternStreamSpecCompiled r = (PatternStreamSpecCompiled)compiled;
EvalNodeAnalysisResult evalNodeAnalysisResult = EvalNodeUtil.RecursiveAnalyzeChildNodes((r.EvalFactoryNode));
IList <EvalFilterFactoryNode> filterNodes = evalNodeAnalysisResult.FilterNodes;
foreach (EvalFilterFactoryNode filterNode in filterNodes)
{
filters.Add(filterNode.FilterSpec);
}
}
if (compiled is NamedWindowConsumerStreamSpec)
{
namedWindows.Add((NamedWindowConsumerStreamSpec)compiled);
}
}
}
public static void WalkStreamSpecs(
StatementSpecRaw spec,
ExprNodeSubselectDeclaredDotVisitor visitor)
{
// determine pattern-filter subqueries
foreach (StreamSpecRaw streamSpecRaw in spec.StreamSpecs) {
if (streamSpecRaw is PatternStreamSpecRaw) {
PatternStreamSpecRaw patternStreamSpecRaw = (PatternStreamSpecRaw) streamSpecRaw;
EvalNodeAnalysisResult analysisResult =
EvalNodeUtil.RecursiveAnalyzeChildNodes(patternStreamSpecRaw.EvalForgeNode);
foreach (EvalForgeNode evalNode in analysisResult.ActiveNodes) {
if (evalNode is EvalFilterForgeNode) {
EvalFilterForgeNode filterNode = (EvalFilterForgeNode) evalNode;
foreach (ExprNode filterExpr in filterNode.RawFilterSpec.FilterExpressions) {
filterExpr.Accept(visitor);
}
}
else if (evalNode is EvalObserverForgeNode) {
int beforeCount = visitor.Subselects.Count;
EvalObserverForgeNode observerNode = (EvalObserverForgeNode) evalNode;
foreach (ExprNode param in observerNode.PatternObserverSpec.ObjectParameters) {
param.Accept(visitor);
}
if (visitor.Subselects.Count != beforeCount) {
throw new ExprValidationException(
"Subselects are not allowed within pattern observer parameters, please consider using a variable instead");
}
}
}
}
}
// determine filter streams
foreach (StreamSpecRaw rawSpec in spec.StreamSpecs) {
if (rawSpec is FilterStreamSpecRaw) {
FilterStreamSpecRaw raw = (FilterStreamSpecRaw) rawSpec;
foreach (ExprNode filterExpr in raw.RawFilterSpec.FilterExpressions) {
filterExpr.Accept(visitor);
}
}
}
}
public static void WalkStatement(StatementSpecRaw spec, ExprNodeSubselectDeclaredDotVisitor visitor)
{
// Look for expressions with sub-selects in select expression list and filter expression
// Recursively compile the statement within the statement.
foreach (SelectClauseElementRaw raw in spec.SelectClauseSpec.SelectExprList)
{
if (raw is SelectClauseExprRawSpec)
{
SelectClauseExprRawSpec rawExpr = (SelectClauseExprRawSpec)raw;
rawExpr.SelectExpression.Accept(visitor);
}
else
{
continue;
}
}
if (spec.FilterRootNode != null)
{
spec.FilterRootNode.Accept(visitor);
}
if (spec.HavingExprRootNode != null)
{
spec.HavingExprRootNode.Accept(visitor);
}
if (spec.UpdateDesc != null)
{
if (spec.UpdateDesc.OptionalWhereClause != null)
{
spec.UpdateDesc.OptionalWhereClause.Accept(visitor);
}
foreach (OnTriggerSetAssignment assignment in spec.UpdateDesc.Assignments)
{
assignment.Expression.Accept(visitor);
}
}
if (spec.OnTriggerDesc != null)
{
VisitSubselectOnTrigger(spec.OnTriggerDesc, visitor);
}
// Determine pattern-filter subqueries
foreach (StreamSpecRaw streamSpecRaw in spec.StreamSpecs)
{
if (streamSpecRaw is PatternStreamSpecRaw)
{
PatternStreamSpecRaw patternStreamSpecRaw = (PatternStreamSpecRaw)streamSpecRaw;
EvalNodeAnalysisResult analysisResult = EvalNodeUtil.RecursiveAnalyzeChildNodes(patternStreamSpecRaw.EvalFactoryNode);
foreach (EvalFactoryNode evalNode in analysisResult.ActiveNodes)
{
if (evalNode is EvalFilterFactoryNode)
{
EvalFilterFactoryNode filterNode = (EvalFilterFactoryNode)evalNode;
foreach (ExprNode filterExpr in filterNode.RawFilterSpec.FilterExpressions)
{
filterExpr.Accept(visitor);
}
}
else if (evalNode is EvalObserverFactoryNode)
{
int beforeCount = visitor.Subselects.Count;
EvalObserverFactoryNode observerNode = (EvalObserverFactoryNode)evalNode;
foreach (ExprNode param in observerNode.PatternObserverSpec.ObjectParameters)
{
param.Accept(visitor);
}
if (visitor.Subselects.Count != beforeCount)
{
throw new ExprValidationException("Subselects are not allowed within pattern observer parameters, please consider using a variable instead");
}
}
}
}
}
// walk streams
WalkStreamSpecs(spec, visitor);
}
