public static void GetEnumerableScalarCodegen(
AggregationAccessorFirstLastIndexWEvalForge forge,
AggregationAccessorForgeGetCodegenContext context)
{
AggregationStateLinearForge stateForge = (AggregationStateLinearForge) context.AccessStateForge;
CodegenMethod getBeanFirstLastIndex = GetBeanFirstLastIndexCodegen(
forge,
context.Column,
context.ClassScope,
stateForge,
context.Method,
context.NamedMethods);
context.Method.Block.DeclareVar<EventBean>("bean", LocalMethod(getBeanFirstLastIndex))
.DebugStack()
.IfRefNullReturnNull("bean")
.DeclareVar<EventBean[]>(
"eventsPerStreamBuf",
NewArrayByLength(typeof(EventBean), Constant(forge.StreamNum + 1)))
.AssignArrayElement("eventsPerStreamBuf", Constant(forge.StreamNum), Ref("bean"))
.DeclareVar<object>(
"value",
LocalMethod(
CodegenLegoMethodExpression.CodegenExpression(
forge.ChildNode,
context.Method,
context.ClassScope,
true),
Ref("eventsPerStreamBuf"),
ConstantTrue(),
ConstantNull()))
.IfRefNullReturnNull("value")
.MethodReturn(StaticMethod(typeof(Collections), "SingletonList", Ref("value")));
}
public static void GetEnumerableEventCodegen(
AggregationAccessorFirstLastIndexWEvalForge forge,
AggregationAccessorForgeGetCodegenContext context)
{
AggregationStateLinearForge stateForge = (AggregationStateLinearForge) context.AccessStateForge;
CodegenMethod getBeanFirstLastIndex = GetBeanFirstLastIndexCodegen(
forge,
context.Column,
context.ClassScope,
stateForge,
context.Method,
context.NamedMethods);
context.Method.Block.MethodReturn(LocalMethod(getBeanFirstLastIndex));
}
public static void GetEnumerableEventsCodegen(
AggregationAccessorFirstLastIndexWEvalForge forge,
AggregationAccessorForgeGetCodegenContext context)
{
AggregationStateLinearForge stateForge = (AggregationStateLinearForge) context.AccessStateForge;
CodegenMethod getBeanFirstLastIndex = GetBeanFirstLastIndexCodegen(
forge,
context.Column,
context.ClassScope,
stateForge,
context.Method,
context.NamedMethods);
context.Method.Block.DeclareVar<EventBean>("bean", LocalMethod(getBeanFirstLastIndex))
.IfRefNullReturnNull("bean")
.MethodReturn(StaticMethod(typeof(Collections), "SingletonList", Ref("bean")));
}
private static CodegenMethod GetBeanFirstLastIndexCodegen(
AggregationAccessorFirstLastIndexWEvalForge forge,
int column,
CodegenClassScope classScope,
AggregationStateLinearForge stateForge,
CodegenMethod parent,
CodegenNamedMethods namedMethods)
{
CodegenMethod method = parent.MakeChild(
typeof(EventBean),
typeof(AggregationAccessorFirstLastIndexWEval),
classScope);
if (forge.Constant == -1) {
Type evalType = forge.IndexNode.EvaluationType;
method.Block.DeclareVar(
evalType,
"indexResult",
LocalMethod(
CodegenLegoMethodExpression.CodegenExpression(
forge.IndexNode,
method,
classScope,
true),
ConstantNull(),
ConstantTrue(),
ConstantNull()));
if (evalType.CanBeNull()) {
method.Block.IfRefNullReturnNull("indexResult");
}
method.Block.DeclareVar<int>(
"index",
SimpleNumberCoercerFactory.CoercerInt.CodegenInt(Ref("indexResult"), evalType));
}
else {
method.Block.DeclareVar<int>("index", Constant(forge.Constant));
}
CodegenExpression value = forge.IsFirst
? stateForge.AggregatorLinear.GetFirstNthValueCodegen(Ref("index"), method, classScope, namedMethods)
: stateForge.AggregatorLinear.GetLastNthValueCodegen(Ref("index"), method, classScope, namedMethods);
method.Block.MethodReturn(value);
return method;
}
