public EnumMostLeastFrequentEventForgeEval(
EnumMostLeastFrequentEventForge forge,
ExprEvaluator innerExpression)
{
this.forge = forge;
this.innerExpression = innerExpression;
}
public static CodegenExpression Codegen(
EnumMostLeastFrequentEventForge forge,
EnumForgeCodegenParams args,
CodegenMethodScope codegenMethodScope,
CodegenClassScope codegenClassScope)
{
var returnType = Boxing.GetBoxedType(forge.InnerExpression.EvaluationType);
var scope = new ExprForgeCodegenSymbol(false, null);
var methodNode = codegenMethodScope.MakeChildWithScope(
returnType,
typeof(EnumMostLeastFrequentEventForgeEval),
scope,
codegenClassScope)
.AddParam(EnumForgeCodegenNames.PARAMS);
var block = methodNode.Block
.IfCondition(ExprDotMethod(EnumForgeCodegenNames.REF_ENUMCOLL, "IsEmpty"))
.BlockReturn(ConstantNull())
.DeclareVar<IDictionary<object, int>>(
"items",
NewInstance(typeof(HashMap<object, int>)));
var forEach = block
.ForEach(typeof(EventBean), "next", EnumForgeCodegenNames.REF_ENUMCOLL)
.AssignArrayElement(EnumForgeCodegenNames.REF_EPS, Constant(forge.StreamNumLambda), Ref("next"))
.DeclareVar<object>( // type erasure issue
"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);
}
