public EnumTakeWhileLastIndexEventsForgeEval(
EnumTakeWhileLastIndexEventsForge forge,
ExprEvaluator innerExpression)
{
_forge = forge;
_innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumTakeWhileLastIndexEventsForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var indexTypeMember = codegenClassScope.AddDefaultFieldUnshared(
true,
typeof(ObjectArrayEventType),
Cast(
typeof(ObjectArrayEventType),
EventTypeUtility.ResolveTypeCodegen(forge.indexEventType, EPStatementInitServicesConstants.REF)));
var scope = new ExprForgeCodegenSymbol(false, null);
var methodNode = codegenMethodScope.MakeChildWithScope(
typeof(FlexCollection),
typeof(EnumTakeWhileLastIndexEventsForgeEval),
scope,
codegenClassScope)
.AddParam(EnumForgeCodegenNames.PARAMS);
var innerValue = forge.innerExpression.EvaluateCodegen(
typeof(bool?),
methodNode,
scope,
codegenClassScope);
var block = methodNode.Block
.IfCondition(ExprDotMethod(EnumForgeCodegenNames.REF_ENUMCOLL, "IsEmpty"))
.BlockReturn(EnumForgeCodegenNames.REF_ENUMCOLL);
block
.DeclareVar<ObjectArrayEventBean>(
"indexEvent",
NewInstance<ObjectArrayEventBean>(NewArrayByLength(typeof(object), Constant(1)), indexTypeMember))
.AssignArrayElement(
EnumForgeCodegenNames.REF_EPS,
Constant(forge.streamNumLambda + 1),
Ref("indexEvent"))
.DeclareVar<object[]>("props", ExprDotName(Ref("indexEvent"), "Properties"));
var blockSingle = block
.IfCondition(EqualsIdentity(ExprDotName(EnumForgeCodegenNames.REF_ENUMCOLL, "Count"), Constant(1)))
.DeclareVar<EventBean>(
"item",
Cast(
typeof(EventBean),
ExprDotMethodChain(EnumForgeCodegenNames.REF_ENUMCOLL).Add("First")))
.AssignArrayElement("props", Constant(0), Constant(0))
.AssignArrayElement(EnumForgeCodegenNames.REF_EPS, Constant(forge.streamNumLambda), Ref("item"));
CodegenLegoBooleanExpression.CodegenReturnValueIfNotNullAndNotPass(
blockSingle,
forge.innerExpression.EvaluationType,
innerValue,
FlexEmpty());
blockSingle.BlockReturn(FlexEvent(Ref("item")));
block
.DeclareVar<ArrayDeque<EventBean>>("result", NewInstance(typeof(ArrayDeque<EventBean>)))
.DeclareVar<EventBean[]>(
"all",
StaticMethod(
typeof(EnumTakeWhileLastEventsForgeEval),
"TakeWhileLastEventBeanToArray",
ExprDotName(EnumForgeCodegenNames.REF_ENUMCOLL, "EventBeanCollection")))
.DeclareVar<int>("index", Constant(0));
var forEach = block.ForLoop(
typeof(int),
"i",
Op(ArrayLength(Ref("all")), "-", Constant(1)),
Relational(Ref("i"), GE, Constant(0)),
Decrement("i"))
.AssignArrayElement("props", Constant(0), Increment("index"))
.AssignArrayElement(
EnumForgeCodegenNames.REF_EPS,
Constant(forge.streamNumLambda),
ArrayAtIndex(Ref("all"), Ref("i")));
CodegenLegoBooleanExpression.CodegenBreakIfNotNullAndNotPass(
forEach,
forge.innerExpression.EvaluationType,
innerValue);
forEach.Expression(ExprDotMethod(Ref("result"), "AddFirst", ArrayAtIndex(Ref("all"), Ref("i"))));
block.MethodReturn(FlexWrap(Ref("result")));
return LocalMethod(methodNode, args.Eps, args.Enumcoll, args.IsNewData, args.ExprCtx);
}