/// <summary>Visit a filter.</summary>
/// <param name="filter">Filter to be visited.</param>
protected override void VisitFilter(Filter filter)
{
int startIndex = _commandText.Length;
_commandText.Append("FILTER (");
VisitComponent(filter.Expression);
_commandText.Append(") ");
int length = _commandText.Length - startIndex;
if (_cancelLast)
{
_commandText.Remove(startIndex, length);
}
_cancelLast = false;
}
private void VisitContainsResultOperator(ContainsResultOperator containsResultOperator, Remotion.Linq.QueryModel queryModel, int index)
{
if (_query.IsSubQuery)
{
_visitor.VisitExpression(containsResultOperator.Item);
QueryComponent item = _visitor.RetrieveComponent();
if (item is IExpression)
{
Filter filter = new Filter(new BinaryOperator(MethodNames.Equal, _mainFromComponent.About, (IExpression)item));
if (!_mainFromComponent.Elements.Contains(filter))
{
_mainFromComponent.Elements.Add(filter);
}
}
EntityConstrain constrain = new EntityConstrain(
new Identifier(_mainFromComponent.About.Name + "_p"),
new Identifier(_mainFromComponent.About.Name + "_o"),
containsResultOperator.Item);
if (!_mainFromComponent.Elements.Contains(constrain))
{
_mainFromComponent.Elements.Add(constrain);
}
Call call = new Call(MethodNames.Any);
call.Arguments.Add(_query);
_result = call;
}
else
{
throw new NotSupportedException(System.String.Format("Cannot perform 'Contains' operation on top level query."));
}
}
/// <summary>Visit a filter.</summary> /// <param name="filter">Filter to be visited.</param> protected abstract void VisitFilter(Filter filter);
/// <summary>Visits a where clause.</summary>
/// <param name="whereClause">Where clause to be visited.</param>
/// <param name="queryModel">Query model containing given from clause.</param>
/// <param name="index">Index of the where clause in the query model.</param>
public override void VisitWhereClause(WhereClause whereClause, Remotion.Linq.QueryModel queryModel, int index)
{
_visitor.ConstantFromClause = _auxFromComponent;
_visitor.VisitExpression(whereClause.Predicate);
QueryComponent queryComponent = _visitor.RetrieveComponent();
IQueryComponentNavigator queryComponentNavigator = queryComponent.GetQueryComponentNavigator();
if (queryComponentNavigator != null)
{
queryComponentNavigator.ReplaceComponent(Identifier.Current, _subject);
}
if (queryComponent is QueryElement)
{
if ((!(queryComponent is EntityConstrain)) && (!_query.Elements.Contains((QueryElement)queryComponent)))
{
_query.Elements.Add((QueryElement)queryComponent);
}
}
else if (!_mainFromComponent.Elements.Contains(queryComponent))
{
Filter filter = new Filter((IExpression)queryComponent);
if (!_mainFromComponent.Elements.Contains(filter))
{
_mainFromComponent.Elements.Add(filter);
}
}
base.VisitWhereClause(whereClause, queryModel, index);
}