private static bool HasNotNullCondition(CellQuery cellQuery, MemberPath member)
{
foreach (var condition in cellQuery.GetConjunctsFromWhereClause())
{
if (condition.RestrictedMemberSlot.MemberPath.Equals(member))
{
if (condition.Domain.Values.Contains(Constant.NotNull))
{
return(true);
}
//Not Null may have been optimized into NOT(1, 2, NULL). SO look into negated cell constants
foreach (
var negatedConst in
condition.Domain.Values.Select(cellConstant => cellConstant as NegatedConstant).Where(
negated => negated != null))
{
if (negatedConst.Elements.Contains(Constant.Null))
{
return(true);
}
}
}
}
return(false);
}
private static bool HasNotNullCondition(CellQuery cellQuery, MemberPath member)
{
foreach (MemberRestriction memberRestriction in cellQuery.GetConjunctsFromWhereClause())
{
if (memberRestriction.RestrictedMemberSlot.MemberPath.Equals(member))
{
if (memberRestriction.Domain.Values.Contains <Constant>(Constant.NotNull))
{
return(true);
}
foreach (NegatedConstant negatedConstant in memberRestriction.Domain.Values.Select <Constant, NegatedConstant>((Func <Constant, NegatedConstant>)(cellConstant => cellConstant as NegatedConstant)).Where <NegatedConstant>((Func <NegatedConstant, bool>)(negated => negated != null)))
{
if (negatedConstant.Elements.Contains <Constant>(Constant.Null))
{
return(true);
}
}
}
}
return(false);
}
/// <summary>
/// Finds errors related to splitting Conditions
/// 1. Condition value is repeated across multiple types
/// 2. A Column/attribute is mapped but also used as a condition
/// </summary>
private void MatchConditionErrors()
{
List <LeftCellWrapper> leftCellWrappers = m_viewgenContext.AllWrappersForExtent;
//Stores violating Discriminator (condition member) so that we dont repeat the same error
Set <MemberPath> mappedConditionMembers = new Set <MemberPath>();
//Both of these data-structs help in finding duplicate conditions
Set <CompositeCondition> setOfconditions = new Set <CompositeCondition>(new ConditionComparer());
Dictionary <CompositeCondition, LeftCellWrapper> firstLCWForCondition = new Dictionary <CompositeCondition, LeftCellWrapper>(new ConditionComparer());
foreach (var leftCellWrapper in leftCellWrappers)
{
CompositeCondition condMembersValues = new CompositeCondition();
CellQuery cellQuery = leftCellWrapper.OnlyInputCell.GetLeftQuery(m_viewgenContext.ViewTarget);
foreach (MemberRestriction condition in cellQuery.GetConjunctsFromWhereClause())
{
MemberPath memberPath = condition.RestrictedMemberSlot.MemberPath;
if (!m_domainMap.IsConditionMember(memberPath))
{
continue;
}
ScalarRestriction scalarCond = condition as ScalarRestriction;
//Check for mapping of Scalar member condition, ignore type conditions
if (scalarCond != null &&
!mappedConditionMembers.Contains(memberPath) && /* prevents duplicate errors */
!leftCellWrapper.OnlyInputCell.CQuery.WhereClause.Equals(leftCellWrapper.OnlyInputCell.SQuery.WhereClause) && /* projection allowed when both conditions are equal */
!IsMemberPartOfNotNullCondition(leftCellWrappers, memberPath, m_viewgenContext.ViewTarget))
{
//This member should not be mapped
CheckThatConditionMemberIsNotMapped(memberPath, leftCellWrappers, mappedConditionMembers);
}
//If a not-null condition is specified on a nullable column,
//check that the property it is mapped to in the fragment is non-nullable,
//unless there is a not null condition on the property that is being mapped it self.
//Otherwise return an error.
if (m_viewgenContext.ViewTarget == ViewTarget.UpdateView)
{
if (scalarCond != null &&
memberPath.IsNullable && IsMemberPartOfNotNullCondition(new LeftCellWrapper[] { leftCellWrapper }, memberPath, m_viewgenContext.ViewTarget))
{
MemberPath rightMemberPath = GetRightMemberPath(memberPath, leftCellWrapper);
if (rightMemberPath != null && rightMemberPath.IsNullable &&
!IsMemberPartOfNotNullCondition(new LeftCellWrapper[] { leftCellWrapper }, rightMemberPath, m_viewgenContext.ViewTarget))
{
m_errorLog.AddEntry(new ErrorLog.Record(true, ViewGenErrorCode.ErrorPatternConditionError,
Strings.Viewgen_ErrorPattern_NotNullConditionMappedToNullableMember(
memberPath, rightMemberPath
), leftCellWrapper.OnlyInputCell, ""));
}
}
}
//CheckForDuplicateConditionValue
//discover a composite condition of the form {path1=x, path2=y, ...}
foreach (var element in condition.Domain.Values)
{
Set <Constant> values;
//if not in the dict, add it
if (!condMembersValues.TryGetValue(memberPath, out values))
{
values = new Set <Constant>(Constant.EqualityComparer);
condMembersValues.Add(memberPath, values);
}
values.Add(element);
}
} //foreach condition
if (condMembersValues.Count > 0) //it is possible that there are no condition members
{
//Check if the composite condition has been encountered before
if (setOfconditions.Contains(condMembersValues))
{
//Extents may be Equal on right side (e.g: by some form of Refconstraint)
if (!RightSideEqual(firstLCWForCondition[condMembersValues], leftCellWrapper))
{
//error duplicate conditions
m_errorLog.AddEntry(new ErrorLog.Record(true, ViewGenErrorCode.ErrorPatternConditionError,
Strings.Viewgen_ErrorPattern_DuplicateConditionValue(
BuildCommaSeparatedErrorString <MemberPath>(condMembersValues.Keys)
),
ToIEnum(firstLCWForCondition[condMembersValues].OnlyInputCell, leftCellWrapper.OnlyInputCell), ""));
}
}
else
{
setOfconditions.Add(condMembersValues);
//Remember which cell the condition came from.. used for error reporting
firstLCWForCondition.Add(condMembersValues, leftCellWrapper);
}
}
} //foreach fragment related to the Extent we are working on
}