public ConflictDetectionResult Process(ContributedConflictGroup group)
{
group.ResolvedMember = null;
group.HasConflict = false;
var result = new ConflictDetectionResult();
if (group.IsSuperceded) {
return result; // TODO: process warnings? views here are superfluous since the member is overriden!
}
// to solve the conflict, EXACTLY one non-abstract member must remain in the list
// only consider foreign members
var resolvedMembers = group.Members.Where(roleMember => roleMember.IsForeign).ToList();
// process excluded members
resolvedMembers = resolvedMembers.Where(roleMember => !roleMember.IsExcluded).ToList();
if (resolvedMembers.Count == 0) {
result.AddMessage(Error.AllMembersExcluded(group.TargetType, group.ResolveRepresentation()));
return result;
}
// process aliased members
resolvedMembers = resolvedMembers.Where(roleMember => !roleMember.IsAliased).ToList();
if (resolvedMembers.Count == 0) {
// all members are aliased
group.ResolvedMember = null;
return result;
}
// process base methods
if (resolvedMembers.All(roleMember => roleMember.Definition.IsBaseMethod())) {
// all members are virtual base members, they'll be provided by the composing class
group.IsBaseMethod = true;
group.ResolvedMember = null;
return result;
}
Tracer.Assert(!resolvedMembers.Any(roleMember => roleMember.Definition.IsBaseMethod()), "Base methods cannot be provided by roles");
if (resolvedMembers.All(roleMember => roleMember.IsAbstract)) {
if (!group.TargetType.IsRole()) {
result.AddMessage(Error.DoesNotImplementAbstractRoleMember(group.TargetType, group.ResolveRepresentation()));
}
return result;
}
// process abstract members
resolvedMembers = resolvedMembers.Where(roleMember => !roleMember.IsAbstract).ToList();
if (resolvedMembers.Count > 1) {
group.HasConflict = true;
result.AddMessage(Error.Conflict(group.TargetType, group.ResolveRepresentation(), resolvedMembers));
return result;
}
group.ResolvedMember = resolvedMembers.Single();
return result;
}
public IMemberDefinition Compose(ContributedConflictGroup group, MethodAttributes accessSpecifier)
{
Group = group;
if (group.ImplementedMember != null) {
return group.ImplementedMember;
}
if (group.DontImplement) {
return null;
}
if (group.IsSuperceded) {
// the superceding member in the class is the implementing member for the role member
return group.ImplementedMember = AdjustSupercedingMember(group.Supercede, group.ResolveOverridingMembers());
}
if (group.IsBaseMethod) {
ImplementBaseMethod(group.Members[0], group.ResolveOverridingMembers()); // any member will do, they all point to the same base method
// TODO: use the ImplementedMember here?
return null;
}
// the resolved member implements all the other members in the group by calling its implementing member
var resolvedMember = group.ResolvedMember;
if (resolvedMember == null) {
// this member does not get composed (it will be aliased by another member)
return null;
}
var implementedMember = ImplementMember(
resolvedMember.Definition.Name,
resolvedMember.ResolveImplementingMember(),
group.ResolveOverridingMembers(),
accessSpecifier);
if (implementedMember == null) {
// this member was not implemented (it was provided by a base class)
return null;
}
if (group.ReuseSlot) {
((MethodDefinition)implementedMember).IsNewSlot = false;
}
return group.ImplementedMember = implementedMember;
}
public IMemberDefinition Compose(ContributedConflictGroup group)
{
return Compose(group, MethodAttributes.Public);
}