internal static bool ShouldBeOptional(this EntityConstrain constrain, IEnumerable <IQueryComponentNavigator> currentQueryComponentStack)
{
bool result = false;
foreach (IQueryComponentNavigator navigator in currentQueryComponentStack)
{
if ((navigator.NavigatedComponent is BinaryOperator) && (((BinaryOperator)navigator.NavigatedComponent).Member == MethodNames.Or))
{
result = true;
break;
}
}
return(result);
}
/// <summary>Visit an entity constrain.</summary>
/// <param name="entityConstrain">Entity constrain to be visited.</param>
protected override void VisitEntityConstrain(EntityConstrain entityConstrain)
{
int startIndex = _commandText.Length;
VisitComponent(_currentEntityAccessor.Peek().About);
_commandText.Append(" ");
VisitComponent(entityConstrain.Predicate);
_commandText.Append(" ");
VisitComponent(entityConstrain.Value);
_commandText.Append(" . ");
int length = _commandText.Length - startIndex;
if (!_visitedComponents.Contains(entityConstrain))
{
_visitedComponents.Add(entityConstrain, startIndex, length);
}
}
/// <summary>Visit an entity constrain.</summary> /// <param name="entityConstrain">Entity constrain to be visited.</param> protected abstract void VisitEntityConstrain(EntityConstrain entityConstrain);
/// <summary>Creates an instance of the conditional constrain selector.</summary>
/// <param name="entityAccessor">Target entity accessor to wrap around.</param>
/// <param name="entityConstrain">Entity constrain.</param>
/// <param name="fallbackConstrain">Fallback constrain.</param>
public ConditionalConstrainSelector(StrongEntityAccessor entityAccessor, EntityConstrain entityConstrain, EntityConstrain fallbackConstrain)
{
EntityAccessor = entityAccessor;
EntityConstrain = entityConstrain;
FallbackConstrain = fallbackConstrain;
}
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."));
}
}
