public EnumDistinctScalarLambdaForgeEval(
EnumDistinctScalarLambdaForge forge,
ExprEvaluator innerExpression)
{
_forge = forge;
_innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumDistinctScalarLambdaForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var resultTypeMember = codegenClassScope.AddDefaultFieldUnshared(
true,
typeof(ObjectArrayEventType),
Cast(
typeof(ObjectArrayEventType),
EventTypeUtility.ResolveTypeCodegen(forge.resultEventType, EPStatementInitServicesConstants.REF)));
var innerType = Boxing.GetBoxedType(forge.InnerExpression.EvaluationType);
var scope = new ExprForgeCodegenSymbol(false, null);
var methodNode = codegenMethodScope
.MakeChildWithScope(
typeof(FlexCollection),
typeof(EnumDistinctScalarLambdaForgeEval),
scope,
codegenClassScope)
.AddParam(EnumForgeCodegenNames.PARAMS);
var block = methodNode.Block
.IfCondition(Relational(ExprDotName(EnumForgeCodegenNames.REF_ENUMCOLL, "Count"), LE, Constant(1)))
.BlockReturn(EnumForgeCodegenNames.REF_ENUMCOLL)
.DeclareVar<IDictionary<object, object>>("distinct", NewInstance(typeof(LinkedHashMap<object, object>)))
.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(
innerType,
"comparable",
forge.InnerExpression.EvaluateCodegen(innerType, methodNode, scope, codegenClassScope))
.IfCondition(Not(ExprDotMethod(Ref("distinct"), "CheckedContainsKey", Ref("comparable"))))
.Expression(ExprDotMethod(Ref("distinct"), "Put", Ref("comparable"), Ref("next")))
.BlockEnd();
block.MethodReturn(FlexWrap(ExprDotName(Ref("distinct"), "Values")));
return LocalMethod(methodNode, args.Eps, args.Enumcoll, args.IsNewData, args.ExprCtx);
}