public override IAggregator CreateAggregator(Type inputType)
{
if (inputType == null)
throw ExceptionBuilder.ArgumentNull("inputType");
SumAggregateBinding sumAggregate = new SumAggregateBinding(String.Empty);
IAggregator sumAggregator = sumAggregate.CreateAggregator(inputType);
if (sumAggregator == null)
return null;
Expression<object> avgExpression = new Expression<object>();
ParameterBinding sumParam = avgExpression.Parameters.Add("@Sum", sumAggregator.ReturnType);
ParameterBinding countParam = avgExpression.Parameters.Add("@Count", typeof(int));
avgExpression.Text = "@Sum / @Count";
try
{
avgExpression.Resolve();
}
catch (CompilationException)
{
return null;
}
return new AverageAggregator(sumAggregator, avgExpression, sumParam, countParam);
}
public override IAggregator CreateAggregator(Type inputType)
{
if (inputType == null)
{
throw ExceptionBuilder.ArgumentNull("inputType");
}
SumAggregateBinding sumAggregate = new SumAggregateBinding(String.Empty);
IAggregator sumAggregator = sumAggregate.CreateAggregator(inputType);
if (sumAggregator == null)
{
return(null);
}
Expression <object> avgExpression = new Expression <object>();
ParameterBinding sumParam = avgExpression.Parameters.Add("@Sum", sumAggregator.ReturnType);
ParameterBinding countParam = avgExpression.Parameters.Add("@Count", typeof(int));
avgExpression.Text = "@Sum / @Count";
try
{
avgExpression.Resolve();
}
catch (CompilationException)
{
return(null);
}
return(new AverageAggregator(sumAggregator, avgExpression, sumParam, countParam));
}