public async Task <IQueryable <T> > Sum(
ODataQueryOptions <T> options,
IQueryable <T> data)
{
var queryStr = ExtractQueryString(options);
var filterValue = ExtractFilter(queryStr);
var propertyName = ExtractPropertyName(queryStr);
using (var context = new SumContext(options, filterValue))
{
var opt = context.GetOptions();
// apply filtration to data
var query = (IQueryable <T>)opt.ApplyTo(data);
// get stub for hacking odata middleware
var stub = await query.FirstOrDefaultAsync();
if (stub == null)
{
stub = new T();
}
// execute sum
var sum = await EntityFrameworkQueryableExtensions.SumAsync(query, GetSumExpression(propertyName));
// update stub
GetUpdateStubFunc(propertyName, sum)(stub);
return(new List <T> {
stub
}
.AsQueryable());
}
}
private bool sum_sempred(SumContext _localctx, int predIndex)
{
switch (predIndex)
{
case 0: return(Precpred(Context, 2));
}
return(true);
}
private SumContext sum(int _p)
{
ParserRuleContext _parentctx = Context;
int _parentState = State;
SumContext _localctx = new SumContext(Context, _parentState);
SumContext _prevctx = _localctx;
int _startState = 2;
EnterRecursionRule(_localctx, 2, RULE_sum, _p);
try {
int _alt;
EnterOuterAlt(_localctx, 1);
{
{
_localctx = new SumToProductContext(_localctx);
Context = _localctx;
_prevctx = _localctx;
State = 18;
product(0);
}
Context.Stop = TokenStream.LT(-1);
State = 25;
ErrorHandler.Sync(this);
_alt = Interpreter.AdaptivePredict(TokenStream, 0, Context);
while (_alt != 2 && _alt != global::Antlr4.Runtime.Atn.ATN.INVALID_ALT_NUMBER)
{
if (_alt == 1)
{
if (ParseListeners != null)
{
TriggerExitRuleEvent();
}
_prevctx = _localctx;
{
{
_localctx = new SumPlusProductContext(new SumContext(_parentctx, _parentState));
PushNewRecursionContext(_localctx, _startState, RULE_sum);
State = 20;
if (!(Precpred(Context, 2)))
{
throw new FailedPredicateException(this, "Precpred(Context, 2)");
}
State = 21;
Match(ADDOP);
State = 22;
product(0);
}
}
}
State = 27;
ErrorHandler.Sync(this);
_alt = Interpreter.AdaptivePredict(TokenStream, 0, Context);
}
}
}
catch (RecognitionException re) {
_localctx.exception = re;
ErrorHandler.ReportError(this, re);
ErrorHandler.Recover(this, re);
}
finally {
UnrollRecursionContexts(_parentctx);
}
return(_localctx);
}
public SumToProductContext(SumContext context)
{
CopyFrom(context);
}
public virtual void CopyFrom(SumContext context)
{
base.CopyFrom(context);
}
