IGraph IInteractiveMerger.MergeOntologyClasses(List <SimilarClassPropertyDescription> mergedClassPairs,
Func <SimilarClassPropertyDescription, bool> canWeMergeClassPairCallback,
Func <SimilarClassPropertyDescription, bool> canWeMergePropertyPairCallback,
double mergePropertiesThreshold,
IFederatedNamesGenerator federatedNamesGen,
ITypeCaster typeCaster,
IProgress <double> progress = null,
Func <string, string, IProgress <double>, Dictionary <string, List <SimilarClassPropertyDescription> > > getSimilarClassPropertiesMatrixMethod = null,
string federatedStem = null)
{
if (federatedStem == null)
{
federatedStem = ConfigurationManager.AppSettings["defaultFederatedStem"];
}
if (getSimilarClassPropertiesMatrixMethod == null) //user didn't provide his own method -> use default one
{
getSimilarClassPropertiesMatrixMethod = new Func <string, string, IProgress <double>, Dictionary <string, List <SimilarClassPropertyDescription> > >
(GetSimilarClassPropertiesMatrix);
}
int mergedClassPairNumber = 0;
double classPairProgressStepDelta = 1.0 / mergedClassPairs.Count;
foreach (SimilarClassPropertyDescription mergedClassPair in mergedClassPairs)
{
mergedClassPairNumber++;
mergedClassPair.MergeClassRelation = MergeClassRelation.SubClassOf; //by default, howerver, using callback user can change this
if (mergedClassPair.SimilarityScore >= mergePropertiesThreshold)
{
if (mergedClassPair.MergeClassRelation == MergeClassRelation.SubClassOf)
{
//merge using rdfs:subClassOf (traverse all merged classes and add this attribute to them)
//now compose federated URI for a federated class
//use the shortest length class name from merged classes
string o1ClassName = GetClassNameFromUri(mergedClassPair.ObjectName1);
string o2ClassName = GetClassNameFromUri(mergedClassPair.ObjectName2);
string federatedClassName = federatedNamesGen.GenerateFederatedName(o1ClassName, o2ClassName);
string federatedUri = federatedStem + federatedClassName;
mergedClassPair.FederatedURI = federatedUri;
string fed = GetClassNameFromUri(mergedClassPair.ObjectName1);
if (canWeMergeClassPairCallback != null)
{
if (!canWeMergeClassPairCallback(mergedClassPair))
{
continue; //we are not allowed to merge these classes, go on, nothing to see here
}
}
//if callback function was not provided or we are allowed to merge classes -> merge them
OntologyClass federatedClass = _merged.CreateOntologyClass(new Uri(federatedUri)); //check federatedClassName to a URI!!!
OntologyClass oclass1 = _merged.AllClasses.Where(oclass => oclass.Resource.ToString() == mergedClassPair.ObjectName1).First();
federatedClass.AddSubClass(oclass1);
OntologyClass oclass2 = _merged.AllClasses.Where(oclass => oclass.Resource.ToString() == mergedClassPair.ObjectName2).First();
federatedClass.AddSubClass(oclass2);
//everything's OK -> add current federated property to ontology graph
OntologyResource ontologyClassResource = _merged.CreateOntologyResource(new Uri(OntologyHelper.OwlClass));
federatedClass.AddType(ontologyClassResource);
//now obtain all merged classes' properties for merging, give them federated URIs and merge them
//before merging, ask a user using callback if he wants to merge the particular props
string class1 = mergedClassPair.ObjectName1;
string class2 = mergedClassPair.ObjectName2;
Progress <double> getClassPropsMatrixProgress = null;
if (progress != null) //report progress
{
getClassPropsMatrixProgress = new Progress <double>(pValue =>
{
//take into account main loop progress
double progressValue = (mergedClassPairNumber / (double)mergedClassPairs.Count) - classPairProgressStepDelta + pValue * classPairProgressStepDelta;
progress.Report(progressValue);
});
}
#region Merge properties for selected classes
//Dictionary<string, List<SimilarClassPropertyDescription>> simDict = GetSimilarClassPropertiesMatrix(
// classUri1: class1,
// classUri2: class2,
// progress: getClassPropsMatrixProgress); //obtain properties similarity matrix
Dictionary <string, List <SimilarClassPropertyDescription> > simDict = getSimilarClassPropertiesMatrixMethod(
class1, //classUri1
class2, //classUri2
getClassPropsMatrixProgress //progress
); //obtain properties similarity matrix
List <SimilarClassPropertyDescription> highestScoreMergePairs = new List <SimilarClassPropertyDescription>();
foreach (var key in simDict.Keys)
{
SimilarClassPropertyDescription map = (from mapping
in simDict[key]
where mapping.SimilarityScore == simDict[key].Max(x => x.SimilarityScore)
select mapping).First();
highestScoreMergePairs.Add(map);
}
//now we have property pairs which are most likely to be equivalent, try to merge them asking user before each merge
foreach (var mergePropertyPair in highestScoreMergePairs)
{
if (mergedClassPair.SimilarityScore >= mergePropertiesThreshold)
{
mergePropertyPair.MergePropRelation = MergePropertyRelation.EquivalentProperty; //by default
//generate federated property URI to suggest to user
int indexOfLastSharp01 = mergePropertyPair.ObjectName1.LastIndexOf('#');
string o1PropName = mergePropertyPair.ObjectName1.Substring(indexOfLastSharp01 + 1,
mergePropertyPair.ObjectName1.Length - 1 - indexOfLastSharp01);
int indexOfLastSharp02 = mergePropertyPair.ObjectName2.LastIndexOf('#');
string o2PropName = mergePropertyPair.ObjectName2.Substring(indexOfLastSharp02 + 1,
mergePropertyPair.ObjectName2.Length - 1 - indexOfLastSharp02);
string federatedPropertyName = federatedNamesGen.GenerateFederatedName(
o1PropName, o2PropName);
string federatedPropURI = $"{mergedClassPair.FederatedURI}#{federatedPropertyName}";
mergePropertyPair.FederatedURI = federatedPropURI;
//federated property URI generation END
if (canWeMergePropertyPairCallback(mergePropertyPair)) //ask user if we're allowed to merge
{
//we're allowed to merge -> add to _merged ontology graph (to federated class) federated property
OntologyProperty federatedProperty = _merged.CreateOntologyProperty(new Uri(mergePropertyPair.FederatedURI));
if (mergePropertyPair.MergePropRelation == MergePropertyRelation.EquivalentProperty)
{
federatedProperty.AddEquivalentProperty(new Uri(mergePropertyPair.ObjectName1));
federatedProperty.AddEquivalentProperty(new Uri(mergePropertyPair.ObjectName2));
}
INode oprop1 = _merged.Nodes.Where(node => node.ToString() == mergePropertyPair.ObjectName1).First(); //!!!!!! спорная ситуация
federatedProperty.AddSubProperty(_merged.CreateOntologyProperty(oprop1));
INode oprop2 = _merged.Nodes.Where(node => node.ToString() == mergePropertyPair.ObjectName2).First(); //!!!!!! спорная ситуация
federatedProperty.AddSubProperty(_merged.CreateOntologyProperty(oprop2));
//to specify domain and range we should MERGE THE DATATYPES!!!
var prop01Range = _o1.GetTriplesWithSubjectPredicate(_o1.CreateUriNode(new Uri(mergePropertyPair.ObjectName1)), _o1.CreateUriNode("rdfs:range")).ToList();
var prop02Range = _o2.GetTriplesWithSubjectPredicate(_o2.CreateUriNode(new Uri(mergePropertyPair.ObjectName2)), _o2.CreateUriNode("rdfs:range")).ToList();
if (prop01Range.Count > 1 || prop02Range.Count > 1)
{
throw new InvalidOperationException($"Property can have only one rdfs:range defined! [Properties {mergePropertyPair.ObjectName1} & {mergePropertyPair.ObjectName2} ]");
}
if (prop01Range.Count != prop02Range.Count)
{
throw new InvalidOperationException($"Properties should both have 1 (or zero) range(s) defined [Properties {mergePropertyPair.ObjectName1} & {mergePropertyPair.ObjectName2} ]");
}
//however, props are allowed to not have range defined
string prop01RangeStr = (prop01Range.First() as Triple).Object.ToString();
string prop02RangeStr = (prop02Range.First() as Triple).Object.ToString();
string castedRange = string.Empty;
//check, if prop01RangeStr OR prop02RangeStr not to be a resource (otherwise, it's a range of an object property,
//and, if ranges of different ObjectProperties don't coincide, we can't merge them, so, delete current federatedProperty
Regex r = new Regex(@"http\w{0,1}://.+");
SimilarClassPropertyDescription mergedClasses = null; //in case we merge resource ranges and need a federated range (case 2)
if (r.IsMatch(prop01RangeStr) || r.IsMatch(prop02RangeStr))
{
//check that prop01RangeStr==prop02RangeStr
if (prop01RangeStr == prop02RangeStr)
{
//OK->federated Range is equal to prop01RangeStr\prop02RangeStr
castedRange = prop01RangeStr;
//federatedProperty.AddRange(new Uri($"xsd:{castedRange}")); -> BUG
federatedProperty.AddRange(new Uri(castedRange));
federatedProperty.AddDomain(new Uri(mergedClassPair.FederatedURI));
OntologyResource ontologyPropertyResource = _merged.CreateOntologyResource(new Uri(OntologyHelper.OwlObjectProperty));
federatedProperty.AddType(ontologyPropertyResource);
}
else if ((mergedClasses = mergedClassPairs.FirstOrDefault(simClassProp => {
return((simClassProp.ObjectName1 == prop01RangeStr &&
simClassProp.ObjectName2 == prop02RangeStr) ||
(simClassProp.ObjectName1 == prop02RangeStr &&
simClassProp.ObjectName2 == prop01RangeStr));
})) != null) //we've found merge pair which states that classes, correspoinding to prop01RangeStr & prop02RangeStr are being merged
{
//if ranges' URIs correspond to classes which are being merged, than we CREATE an ObjectProperty with several ranges
federatedProperty.AddRange(new Uri(prop01RangeStr));
federatedProperty.AddRange(new Uri(prop02RangeStr));
federatedProperty.AddDomain(new Uri(mergedClassPair.FederatedURI));
//add here FEDERATED range too
//get federated class name -> superclass of these 2 given merged classes
if (string.IsNullOrEmpty(mergedClasses.FederatedURI)) //if classes have not been merged yet
{
//fragment copied from above [when merging classes]
o1ClassName = GetClassNameFromUri(mergedClasses.ObjectName1);
o2ClassName = GetClassNameFromUri(mergedClasses.ObjectName2);
federatedClassName = federatedNamesGen.GenerateFederatedName(o1ClassName, o2ClassName);
federatedUri = federatedStem + federatedClassName;
mergedClasses.FederatedURI = federatedUri;
}
federatedProperty.AddRange(new Uri(mergedClasses.FederatedURI));
OntologyResource ontologyPropertyResource = _merged.CreateOntologyResource(new Uri(OntologyHelper.OwlObjectProperty));
federatedProperty.AddType(ontologyPropertyResource);
}
else
{
//ranges of different ObjectProperties don't coincide, we can't merge them, so, don't add current federatedProperty to graph
//federated schema should reference federated schema, otherwise it's a logical error!
continue;
}
}
else
{
//ranges should be XSD!, because we're using XSDTypeCaster by default
castedRange = typeCaster.CastTypes(prop01RangeStr, prop02RangeStr);
federatedProperty.AddRange(new Uri($"xsd:{castedRange}"));
federatedProperty.AddDomain(new Uri(mergedClassPair.FederatedURI));
//everything's OK -> add current federated property to ontology graph
OntologyResource ontologyPropertyResource = _merged.CreateOntologyResource(new Uri(OntologyHelper.OwlDatatypeProperty));
federatedProperty.AddType(ontologyPropertyResource);
}
}
else
{
continue; //we're not allowed to merge this pair
}
}
}
#endregion
}
else
{
throw new NotImplementedException("Merging for other types of relations is not implemented!");
}
}
else
{
continue; //didn't pass through threshold
}
}
_merged.SaveToFile("mergedOntology.log.owl");
return(_merged);
}