public EnumMostLeastFrequentScalarLamdaForgeEval(
EnumMostLeastFrequentScalarLamdaForge forge,
ExprEvaluator innerExpression)
{
_forge = forge;
_innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumMostLeastFrequentScalarLamdaForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var resultTypeMember = codegenClassScope.AddDefaultFieldUnshared(
true,
typeof(ObjectArrayEventType),
Cast(
typeof(ObjectArrayEventType),
EventTypeUtility.ResolveTypeCodegen(forge.resultEventType, EPStatementInitServicesConstants.REF)));
var returnType = Boxing.GetBoxedType(forge.InnerExpression.EvaluationType);
var scope = new ExprForgeCodegenSymbol(false, null);
var paramTypes = EnumForgeCodegenNames.PARAMS;
var methodNode = codegenMethodScope
.MakeChildWithScope(
returnType,
typeof(EnumMostLeastFrequentScalarLamdaForgeEval),
scope,
codegenClassScope)
.AddParam(paramTypes);
var block = methodNode.Block
.IfCondition(ExprDotMethod(EnumForgeCodegenNames.REF_ENUMCOLL, "IsEmpty"))
.BlockReturn(ConstantNull())
.DeclareVar<IDictionary<object, int>>("items", NewInstance(typeof(HashMap<object, int>)))
.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"));
block.ForEach(typeof(object), "next", EnumForgeCodegenNames.REF_ENUMCOLL)
.AssignArrayElement("props", Constant(0), Ref("next"))
.DeclareVar<object>(
"item",
forge.InnerExpression.EvaluateCodegen(typeof(object), methodNode, scope, codegenClassScope))
.DeclareVar<int?>("existing", ExprDotMethod(Ref("items"), "GetBoxed", Ref("item")))
.IfCondition(EqualsNull(Ref("existing")))
.AssignRef("existing", Constant(1))
.IfElse()
.Increment("existing")
.BlockEnd()
.ExprDotMethod(Ref("items"), "Put", Ref("item"), Unbox(Ref("existing")));
block.MethodReturn(
Cast(
returnType,
StaticMethod(
typeof(EnumMostLeastFrequentEventForgeEval),
"GetEnumMostLeastFrequentResult",
Ref("items"),
Constant(forge.isMostFrequent))));
return LocalMethod(methodNode, args.Eps, args.Enumcoll, args.IsNewData, args.ExprCtx);
}
