public EnumAverageScalarLambdaForgeEval(
EnumAverageScalarLambdaForge forge,
ExprEvaluator innerExpression)
{
_forge = forge;
_innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumAverageScalarLambdaForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var innerType = forge.InnerExpression.EvaluationType;
var resultTypeMember = codegenClassScope.AddDefaultFieldUnshared(
true,
typeof(ObjectArrayEventType),
Cast(
typeof(ObjectArrayEventType),
EventTypeUtility.ResolveTypeCodegen(forge.resultEventType, EPStatementInitServicesConstants.REF)));
var scope = new ExprForgeCodegenSymbol(false, null);
var methodNode = codegenMethodScope.MakeChildWithScope(
typeof(double?),
typeof(EnumAverageEventsForgeEval),
scope,
codegenClassScope)
.AddParam(EnumForgeCodegenNames.PARAMS);
var block = methodNode.Block
.DeclareVar<double>("sum", Constant(0d))
.DeclareVar<int>("count", Constant(0))
.DeclareVar<ObjectArrayEventBean>(
"resultEvent",
NewInstance<ObjectArrayEventBean>(
NewArrayByLength(typeof(object), Constant(1)),
resultTypeMember))
.AssignArrayElement(EnumForgeCodegenNames.REF_EPS, Constant(forge.StreamNumLambda), Ref("resultEvent"))
.DeclareVar<object[]>("props", ExprDotName(Ref("resultEvent"), "Properties"));
var forEach = block.ForEach(typeof(object), "next", EnumForgeCodegenNames.REF_ENUMCOLL)
.AssignArrayElement("props", Constant(0), Ref("next"))
.DeclareVar(
innerType,
"num",
forge.InnerExpression.EvaluateCodegen(innerType, methodNode, scope, codegenClassScope));
if (innerType.CanBeNull()) {
forEach.IfRefNull("num").BlockContinue();
}
forEach.Increment("count")
.AssignRef(
"sum",
Op(
Ref("sum"),
"+",
SimpleNumberCoercerFactory.CoercerDouble.CodegenDouble(Ref("num"), innerType)))
.BlockEnd();
block.IfCondition(EqualsIdentity(Ref("count"), Constant(0)))
.BlockReturn(ConstantNull())
.MethodReturn(Op(Ref("sum"), "/", Ref("count")));
return LocalMethod(methodNode, args.Eps, args.Enumcoll, args.IsNewData, args.ExprCtx);
}
