public override VfpExpression Visit(VfpNewInstanceExpression expression)
{
var arguments = expression.Arguments.Select(GetVfpExpression).ToList();
return(new VfpNewInstanceExpression(expression.ResultType,
VisitVfpExpressionList(arguments),
CreateVfpRelatedEntityRefList(expression.Relationships)));
}
public override VfpExpression Visit(VfpNewInstanceExpression expression)
{
_canRewrite = true;
var result = base.Visit(expression);
_canRewrite = false;
return(result);
}
public override VfpExpression Visit(VfpProjectExpression expression)
{
VfpProjectExpression innerProjectionExpression;
bool hasNotExpression;
if (GetInnerProjectionExpression(expression, out innerProjectionExpression, out hasNotExpression))
{
var innerNewInstanceExpression = innerProjectionExpression.Projection as VfpNewInstanceExpression;
if (innerNewInstanceExpression != null)
{
var innerConstExpression = innerNewInstanceExpression.Arguments[0] as VfpConstantExpression;
if (innerConstExpression != null)
{
var countExpression = new VfpConstantExpression(innerConstExpression.ResultType, "COUNT(*)");
innerNewInstanceExpression = new VfpNewInstanceExpression(innerNewInstanceExpression.ResultType, new VfpExpressionList(new List <VfpExpression> {
countExpression
}));
innerProjectionExpression = new VfpProjectExpression(innerProjectionExpression.ResultType, innerProjectionExpression.Input, innerNewInstanceExpression);
VfpExpression comparison = new VfpComparisonExpression(VfpExpressionKind.LessThan,
PrimitiveTypeKind.Boolean.ToTypeUsage(),
new VfpConstantExpression(
PrimitiveTypeKind.Int32.ToTypeUsage(), 0),
innerProjectionExpression);
if (!hasNotExpression)
{
comparison = new VfpNotExpression(comparison.ResultType, comparison);
}
innerNewInstanceExpression = new VfpNewInstanceExpression(innerNewInstanceExpression.ResultType, new VfpExpressionList(new List <VfpExpression> {
comparison
}));
innerProjectionExpression = new VfpProjectExpression(expression.ResultType, expression.Input, innerNewInstanceExpression);
return(innerProjectionExpression);
}
}
}
return(base.Visit(expression));
}
//public override VfpExpression Visit(VfpLimitExpression expression) {
// this.WriteMethodName(MethodInfo.GetCurrentMethod());
// throw new NotImplementedException();
//}
public override VfpExpression Visit(VfpNewInstanceExpression expression)
{
Write(expression.Arguments);
return(expression);
}
public virtual VfpExpression Visit(VfpNewInstanceExpression expression)
{
return(new VfpNewInstanceExpression(expression.ResultType,
VisitVfpExpressionList(expression.Arguments),
CreateVfpRelatedEntityRefList(expression.Relationships)));
}
