/// <summary>
/// Checks that only one role is played by the value type, that it has a boolean data type, and that
/// if it has a value constraint, that value constraint is alethic and only allows the value 'true'.
/// </summary>
private static bool ValidateImplicitBooleanValueType(ObjectType implicitBooleanValueType)
{
if (!implicitBooleanValueType.IsValueType || !implicitBooleanValueType.IsImplicitBooleanValue || implicitBooleanValueType.IsIndependent ||
implicitBooleanValueType.PlayedRoleCollection.Count != 1 || !(implicitBooleanValueType.DataType is TrueOrFalseLogicalDataType))
{
return(false);
}
ValueTypeValueConstraint valueConstraint = implicitBooleanValueType.ValueConstraint;
if (valueConstraint != null)
{
// UNDONE: We need to check for alethic here once ValueTypeValueConstraint supports Modality...
LinkedElementCollection <ValueRange> valueRangeCollection = valueConstraint.ValueRangeCollection;
ValueRange valueRange;
bool value;
if (valueRangeCollection.Count != 1 ||
!bool.TryParse((valueRange = valueRangeCollection[0]).MinValue, out value) || !value ||
!bool.TryParse(valueRange.MaxValue, out value) || !value)
{
return(false);
}
}
else
{
// UNDONE: We are only allowing open-world assumption for now, so the value constraint is required.
return(false);
}
return(true);
}
/// <summary>
/// Binarizes the unary <see cref="FactType"/> specified by <paramref name="unaryFactType"/>, defaulting
/// to using open-world assumption. The caller is responsible for making sure <paramref name="unaryFactType"/>
/// is in fact a unary fact type.
/// </summary>
public static void BinarizeUnary(FactType unaryFactType, INotifyElementAdded notifyAdded)
{
Partition partition = unaryFactType.Partition;
Store store = partition.Store;
IHasAlternateOwner <FactType> toAlternateOwner;
IAlternateElementOwner <FactType> alternateFactTypeOwner = (null == (toAlternateOwner = unaryFactType as IHasAlternateOwner <FactType>)) ? null : toAlternateOwner.AlternateOwner;
LinkedElementCollection <RoleBase> roleCollection = unaryFactType.RoleCollection;
Debug.Assert(roleCollection.Count == 1, "Unaries should only have one role.");
Role unaryRole = (Role)roleCollection[0];
string implicitBooleanValueTypeName = GetImplicitBooleanValueTypeName(unaryRole);
// UNDONE: We are using open-world assumption now
// Setup the mandatory constraint (for closed-world assumption)
//MandatoryConstraint mandatoryConstraint = MandatoryConstraint.CreateSimpleMandatoryConstraint(unaryRole);
//mandatoryConstraint.Model = unaryFactType.Model;
//if (notifyAdded != null)
//{
// notifyAdded.ElementAdded(mandatoryConstraint, true);
//}
// Setup the uniqueness constraint (to make the newly binarized FactType valid)
if (unaryRole.SingleRoleAlethicUniquenessConstraint == null)
{
UniquenessConstraint uniquenessConstraint = UniquenessConstraint.CreateInternalUniquenessConstraint(unaryFactType);
uniquenessConstraint.RoleCollection.Add(unaryRole);
if (notifyAdded != null)
{
notifyAdded.ElementAdded(uniquenessConstraint, true);
}
}
// Setup the boolean role (to make the FactType a binary)
Role implicitBooleanRole = new Role(partition, null);
implicitBooleanRole.Name = unaryRole.Name;
// Setup the boolean value type (because the boolean role needs a role player)
IAlternateElementOwner <ObjectType> alternateObjectTypeOwner = null;
DomainClassInfo alternateCtor =
(null != alternateFactTypeOwner &&
null != (alternateObjectTypeOwner = alternateFactTypeOwner as IAlternateElementOwner <ObjectType>)) ?
alternateObjectTypeOwner.GetOwnedElementClassInfo(typeof(ObjectType)) :
null;
PropertyAssignment implicitBooleanProperty = new PropertyAssignment(ObjectType.IsImplicitBooleanValueDomainPropertyId, true);
ObjectType implicitBooleanValueType = (alternateCtor != null) ?
(ObjectType)partition.ElementFactory.CreateElement(alternateCtor, implicitBooleanProperty) :
new ObjectType(partition, implicitBooleanProperty);
Dictionary <object, object> contextInfo = store.TransactionManager.CurrentTransaction.TopLevelTransaction.Context.ContextInfo;
object duplicateNamesKey = ORMModel.AllowDuplicateNamesKey;
bool removeDuplicateNamesKey = false;
object duplicateSignaturesKey = ORMModel.BlockDuplicateReadingSignaturesKey;
bool addDuplicateSignaturesKey = false;
try
{
if (!contextInfo.ContainsKey(duplicateNamesKey))
{
contextInfo[duplicateNamesKey] = null;
removeDuplicateNamesKey = true;
}
if (contextInfo.ContainsKey(duplicateSignaturesKey))
{
contextInfo[duplicateSignaturesKey] = null;
addDuplicateSignaturesKey = true;
}
implicitBooleanValueType.Name = implicitBooleanValueTypeName;
if (alternateCtor != null)
{
((IHasAlternateOwner <ObjectType>)implicitBooleanValueType).AlternateOwner = alternateObjectTypeOwner;
}
else
{
implicitBooleanValueType.Model = unaryFactType.ResolvedModel;
}
if (notifyAdded != null)
{
notifyAdded.ElementAdded(implicitBooleanValueType, true);
}
}
finally
{
if (removeDuplicateNamesKey)
{
contextInfo.Remove(duplicateNamesKey);
}
if (addDuplicateSignaturesKey)
{
contextInfo[duplicateSignaturesKey] = null;
}
}
implicitBooleanValueType.DataType = store.ElementDirectory.FindElements <TrueOrFalseLogicalDataType>(false)[0];
// Set value constraint on implicit boolean ValueType for open-world assumption
ValueTypeValueConstraint implicitBooleanValueConstraint = implicitBooleanValueType.ValueConstraint
= new ValueTypeValueConstraint(partition, null);
// Add the true-only ValueRange to the value constraint for open-world assumption
implicitBooleanValueConstraint.ValueRangeCollection.Add(new ValueRange(partition,
new PropertyAssignment(ValueRange.MinValueDomainPropertyId, bool.TrueString),
new PropertyAssignment(ValueRange.MaxValueDomainPropertyId, bool.TrueString)));
// Make the boolean value type the role player for the implicit boolean role
implicitBooleanRole.RolePlayer = implicitBooleanValueType;
// Add the boolean role to the FactType
roleCollection.Add(implicitBooleanRole);
if (notifyAdded != null)
{
notifyAdded.ElementAdded(implicitBooleanRole, true);
}
}