private CriteriaToStringVisitResult ConvertCastFunction(FunctionOperator theOperator, Type type)
{
CriteriaToStringVisitResult result = null;
if (theOperator.Operands.Count >= 1)
{
result = new CriteriaToStringVisitResult(String.Format("Cast({0} as {1})", Process(theOperator.Operands[0]).Result, type.FullName));
}
return result;
}
public override Object Visit(AggregateOperand operand)
{
Object result = null;
if (operand.AggregateType == Aggregate.Count)
{
if (Object.ReferenceEquals(operand.CollectionProperty, null))
{
result = new CriteriaToStringVisitResult("Count(0)");
}
else
{
result = new CriteriaToStringVisitResult(String.Format("Count(select value 1 from {0})", Process(operand.CollectionProperty).Result));
}
}
else if (operand.AggregateType == Aggregate.Sum)
{
if (Object.ReferenceEquals(operand.CollectionProperty, null))
{
result = new CriteriaToStringVisitResult(String.Format("Sum({0})", Process(operand.AggregatedExpression).Result));
}
else
{
String collectionTableName = operand.CollectionProperty.PropertyName;
Xpand.ExpressApp.NH.DataLayer.CriteriaToHqlConverter criteriaToEFSqlConverter = new Xpand.ExpressApp.NH.DataLayer.CriteriaToHqlConverter(collectionTableName, GetListElementType(operand.CollectionProperty.PropertyName));
result = new CriteriaToStringVisitResult(String.Format("Sum(select value {0} from {1} as {2})",
criteriaToEFSqlConverter.Convert(operand.AggregatedExpression),
Process(operand.CollectionProperty).Result,
collectionTableName));
}
}
else if (operand.AggregateType == Aggregate.Exists)
{
String collectionTableName = operand.CollectionProperty.PropertyName;
Xpand.ExpressApp.NH.DataLayer.CriteriaToHqlConverter criteriaToEFSqlConverter = new Xpand.ExpressApp.NH.DataLayer.CriteriaToHqlConverter(collectionTableName, GetListElementType(operand.CollectionProperty.PropertyName));
result = new CriteriaToStringVisitResult(String.Format("Exists(from {0} as {1} where {2})",
Process(operand.CollectionProperty).Result,
collectionTableName,
criteriaToEFSqlConverter.Convert(operand.Condition)));
}
else
{
String resultString = ((CriteriaToStringVisitResult)base.Visit(operand)).Result;
result = new CriteriaToStringVisitResult(resultString.TrimStart('[', ']', '.'));
}
return result;
}