public EnumGroupByKeySelectorScalarLambdaForgeEval(
EnumGroupByKeySelectorScalarLambdaForge forge,
ExprEvaluator innerExpression)
{
_forge = forge;
_innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumGroupByKeySelectorScalarLambdaForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var resultTypeMember = codegenClassScope.AddDefaultFieldUnshared(
true,
typeof(ObjectArrayEventType),
Cast(
typeof(ObjectArrayEventType),
EventTypeUtility.ResolveTypeCodegen(forge.resultEventType, EPStatementInitServicesConstants.REF)));
var paramTypes = EnumForgeCodegenNames.PARAMS;
var scope = new ExprForgeCodegenSymbol(false, null);
var methodNode = codegenMethodScope.MakeChildWithScope(
typeof(IDictionary<object, object>),
typeof(EnumGroupByKeySelectorScalarLambdaForgeEval),
scope,
codegenClassScope)
.AddParam(paramTypes);
var block = methodNode.Block
.IfCondition(ExprDotMethod(EnumForgeCodegenNames.REF_ENUMCOLL, "IsEmpty"))
.BlockReturn(StaticMethod(typeof(Collections), "GetEmptyMap", new[] { typeof(object), typeof(object) }))
.DeclareVar<IDictionary<object, object>>("result", 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"));
var forEach = block.ForEach(typeof(object), "next", EnumForgeCodegenNames.REF_ENUMCOLL)
.AssignArrayElement("props", Constant(0), Ref("next"))
.DeclareVar<object>(
"key",
forge.InnerExpression.EvaluateCodegen(typeof(object), methodNode, scope, codegenClassScope))
.DeclareVar<ICollection<object>>(
"value",
Cast(typeof(ICollection<object>), ExprDotMethod(Ref("result"), "Get", Ref("key"))))
.IfRefNull("value")
.AssignRef("value", NewInstance(typeof(List<object>)))
.Expression(ExprDotMethod(Ref("result"), "Put", Ref("key"), Ref("value")))
.BlockEnd()
.Expression(ExprDotMethod(Ref("value"), "Add", Ref("next")));
block.MethodReturn(Ref("result"));
return LocalMethod(methodNode, args.Eps, args.Enumcoll, args.IsNewData, args.ExprCtx);
}