public static Expression GetMergeExpression(string query, Type itemType)
{
EvoQLBuilder builder = new EvoQLBuilder(query);
ParameterExpression parameterExpression;
EvoQLExpression parse;
var filterexpr = builder.GetFilterExpression(out parse, out parameterExpression);
var get = parse.Tree as GetExpression;
var isCount = get.Select == "Count";
var select = new SelectDescriptor {
SourcePath = get.Select, Aggregate = isCount ? "Count" : "Sum", TargetPath = isCount ? "_Count" : get.Select
};
var mapreduceexpr = GetReduceExpression(query, itemType);
var resultType = mapreduceexpr.GetType().GetProperty("ReturnType").GetValue(mapreduceexpr, null) as Type;
var resultElementType = ReduceExpressionGeneration.GetTypeOfEnumerable(resultType);
//Expression mergeExpr = ReduceExpressionGeneration.GetMergeExpression(select, resultElementType);
var mergeexpr = ReduceExpressionGeneration.GetMergeInvocationExpression(select, resultType);
return(mergeexpr);
}
