/// <summary>Examines the supplied ConciseBoundedDescription and attempts to locate more information about the described resource.</summary>
/// <param name="resourceDescription">A ConciseBoundedDescription about which more information is required.</param>
/// <param name="investigator">An investigator that encapsulates the algorithm to be used to locate more information.</param>
public virtual void Investigate(ConciseBoundedDescription resourceDescription, Investigator investigator)
{
SemPlan.Spiral.Core.ResourceFactory resourceFactory = itsTripleStoreFactory.MakeResourceFactory();
investigator.NewStatement += itsAssertions.GetStatementHandler();
investigator.investigate(resourceDescription, this, itsParserFactory, resourceFactory, itsStatementFactory, itsDereferencer);
investigator.NewStatement -= itsAssertions.GetStatementHandler();
}
private ResourceDescription GetDescriptionOf(Resource theResource, TripleStore store, Hashtable processedResources)
{
ConciseBoundedDescription cbd = new ConciseBoundedDescription(theResource);
IList denotingNodes = store.GetNodesDenoting(theResource);
processedResources[theResource] = denotingNodes;
foreach (GraphMember member in denotingNodes)
{
cbd.AddDenotation(member, theResource);
}
Query query = new Query();
query.AddPattern(new Pattern(store.GetBestDenotingNode(theResource), new Variable("pred"), new Variable("obj")));
IEnumerator solutions = store.Solve(query);
while (solutions.MoveNext())
{
QuerySolution solution = (QuerySolution)solutions.Current;
foreach (GraphMember member in store.GetNodesDenoting(solution["pred"]))
{
cbd.AddDenotation(member, solution["pred"]);
}
foreach (GraphMember member in store.GetNodesDenoting(solution["obj"]))
{
cbd.AddDenotation(member, solution["obj"]);
}
cbd.Add(new ResourceStatement(theResource, solution["pred"], solution["obj"]));
if (store.GetBestDenotingNode(solution["obj"]) is BlankNode)
{
if (!processedResources.ContainsKey(solution["obj"]))
{
cbd.Add((ConciseBoundedDescription)GetDescriptionOf(solution["obj"], store, processedResources));
}
}
}
return(cbd);
}
public virtual Resource GetResourceDescribedBy(ConciseBoundedDescription externalDescription)
{
if (TripleStore.HasNodeDenoting(externalDescription.Resource))
{
return(externalDescription.Resource);
}
else
{
foreach (Node node in externalDescription.DenotingNodes)
{
if (TripleStore.HasResourceDenotedBy(node))
{
return(TripleStore.GetResourceDenotedBy(node));
}
}
return(externalDescription.Resource);
}
}
public virtual void Replace(ConciseBoundedDescription description)
{
Resource internalSubjectResource = GetResourceDescribedBy(description);
ArrayList statementsToRemove = new ArrayList();
IEnumerator statementEnumerator = itsAssertions.GetStatementEnumerator();
while (statementEnumerator.MoveNext())
{
ResourceStatement statement = (ResourceStatement)statementEnumerator.Current;
if (statement.GetSubject().Equals(internalSubjectResource))
{
statementsToRemove.Add(statement);
}
}
foreach (ResourceStatement statement in statementsToRemove)
{
itsAssertions.Remove(statement);
}
Add(description);
}
public void Add(ConciseBoundedDescription description)
{
itsStore.Add(description.itsStore);
}