public NodeDifference(
ElementIdentifier identifier,
OperationOnParent operationOnParent,
IEnumerable<Difference> subdifferences)
: base(identifier, operationOnParent)
{
m_subdifferences = new DifferenceHashList(subdifferences);
}
public NodeConflict(
ElementIdentifier identifier,
OperationOnParent operationOnParent,
IEnumerable<Difference> acceptedSubdifferences,
IEnumerable<Conflict> subconflicts)
: base(identifier)
{
if (!Enum.IsDefined(operationOnParent.GetType(), operationOnParent))
throw new ArgumentOutOfRangeException("operationOnParent", operationOnParent, "Invalid value");
if (acceptedSubdifferences == null)
throw new ArgumentNullException("acceptedSubdifferences");
if (subconflicts == null)
throw new ArgumentNullException("subconflicts");
r_operationOnParent = operationOnParent;
r_acceptedSubdifferences = new DifferenceHashList(acceptedSubdifferences);
r_subconflicts = new List<Conflict>(subconflicts);
}
public override Conflict CompareTo(Difference destinationDifference)
{
if (destinationDifference == null)
throw new ArgumentNullException("destinationDifference");
if (!destinationDifference.Identifier.Equals(this.Identifier))
throw new MergeException("Cannot compare differences that does not share the same identifier.");
var source = this;
var destination = destinationDifference as NodeDifference;
if (destination == null)
throw new MergeException(string.Format("Cannot compare a {0} to a {1}.", destinationDifference.GetType().Name, this.GetType().Name));
if (source.OperationOnParent != destination.OperationOnParent)
{
return new OperationTypeConflict(
source,
destination);
}
else
{
var subconflicts = new List<Conflict>();
var acceptedSubdifferences = new DifferenceHashList();
foreach (var destinationSubdifference in destination.Subdifferences)
{
// Add all the destinationBranchDifferences to the acceptedSubdifferences (they might be removed from the list later).
acceptedSubdifferences.Add(destinationSubdifference);
}
foreach (var sourceSubdifference in source.Subdifferences)
{
if (!acceptedSubdifferences.Contains(sourceSubdifference.Identifier))
{
// This is a new difference that is not present in the destination branch, add the difference to the acceptedSubdifferences.
acceptedSubdifferences.Add(sourceSubdifference);
}
else
{
// There is a difference in both branch for the same identifier, see if there is a conflict or not
var destinationSubdifference = acceptedSubdifferences[sourceSubdifference.Identifier];
var conflict = sourceSubdifference.CompareTo(destinationSubdifference);
if (conflict != null)
{
var nodeConflict = conflict as NodeConflict;
if ((nodeConflict != null) && (nodeConflict.Subconflicts.Count == 0))
{
acceptedSubdifferences.Remove(sourceSubdifference.Identifier);
acceptedSubdifferences.Add(
new NodeDifference(
nodeConflict.Identifier,
nodeConflict.OperationOnParent,
nodeConflict.AcceptedSubdifferences));
}
else
{
acceptedSubdifferences.Remove(sourceSubdifference.Identifier);
subconflicts.Add(conflict);
}
}
}
}
return new NodeConflict(
source.Identifier,
source.OperationOnParent,
acceptedSubdifferences,
subconflicts);
}
}
public void Remove(ShouldBeRemovedHandler shouldBeRemovedHandler)
{
var filteredSubdifferences = new DifferenceHashList();
foreach (var subdifference in m_subdifferences)
{
if (shouldBeRemovedHandler(subdifference))
{
// Do nothing
}
else if (subdifference is NodeDifference)
{
var nodeSubdifference = subdifference as NodeDifference;
var nbSubdiffsBefore = nodeSubdifference.Subdifferences.Count;
nodeSubdifference.Remove(shouldBeRemovedHandler);
if ((nodeSubdifference.Subdifferences.Count > 0) || (nbSubdiffsBefore == 0))
{
filteredSubdifferences.Add(subdifference);
}
}
else
{
filteredSubdifferences.Add(subdifference);
}
}
m_subdifferences = filteredSubdifferences;
}