private static CodegenExpression MakeEvaluate(
SubselectEvaluationType evaluationType,
ExprSubselectNode subselectNode,
Type resultType,
CodegenMethodScope parent,
ExprForgeCodegenSymbol symbols,
CodegenClassScope classScope)
{
var method = parent.MakeChild(resultType, typeof(ExprSubselectNode), classScope);
CodegenExpression eps = symbols.GetAddEPS(method);
var newData = symbols.GetAddIsNewData(method);
CodegenExpression evalCtx = symbols.GetAddExprEvalCtx(method);
// get matching events
CodegenExpression future = classScope.NamespaceScope.AddOrGetDefaultFieldWellKnown(
new CodegenFieldNameSubqueryResult(subselectNode.SubselectNumber),
typeof(SubordTableLookupStrategy));
var evalMatching = FlexWrap(ExprDotMethod(future, "Lookup", eps, evalCtx));
method.Block.DeclareVar<FlexCollection>(NAME_MATCHINGEVENTS, evalMatching);
// process matching events
var evalMatchSymbol = new ExprSubselectEvalMatchSymbol();
var processMethod = method
.MakeChildWithScope(resultType, typeof(ExprSubselectNode), evalMatchSymbol, classScope)
.AddParam(typeof(FlexCollection), NAME_MATCHINGEVENTS)
.AddParam(ExprForgeCodegenNames.PARAMS);
CodegenExpression process;
if (evaluationType == PLAIN) {
process = subselectNode.EvalMatchesPlainCodegen(processMethod, evalMatchSymbol, classScope);
}
else if (evaluationType == GETEVENTCOLL) {
process = subselectNode.EvalMatchesGetCollEventsCodegen(processMethod, evalMatchSymbol, classScope);
}
else if (evaluationType == GETSCALARCOLL) {
process = subselectNode.EvalMatchesGetCollScalarCodegen(processMethod, evalMatchSymbol, classScope);
}
else if (evaluationType == GETEVENT) {
process = subselectNode.EvalMatchesGetEventBeanCodegen(processMethod, evalMatchSymbol, classScope);
}
else if (evaluationType == TYPABLESINGLE) {
process = subselectNode.EvalMatchesTypableSingleCodegen(processMethod, evalMatchSymbol, classScope);
}
else if (evaluationType == TYPABLEMULTI) {
process = subselectNode.EvalMatchesTypableMultiCodegen(processMethod, evalMatchSymbol, classScope);
}
else {
throw new IllegalStateException("Unrecognized evaluation type " + evaluationType);
}
evalMatchSymbol.DerivedSymbolsCodegen(processMethod, processMethod.Block, classScope);
processMethod.Block.MethodReturn(process);
method.Block.MethodReturn(LocalMethod(processMethod, REF_MATCHINGEVENTS, eps, newData, evalCtx));
return LocalMethod(method);
}