public string CalculateHash(HashSet <Triple> triples)
{
var finalDigest = new byte[_hashCalculator.HashSize / 8];
_triplesWithBlankNodeAsSubject = new Dictionary <string, List <Triple> >();
_triplesWithBlankNodeAsObject = new Dictionary <string, List <Triple> >();
PopulateBlankNodeLists(triples);
foreach (var t in triples)
{
var subject = t.Subject;
var object_ = t.Object;
if (subject.IsBlankNode() || t.Object.IsBlankNode())
{
if (t.Subject.IsBlankNode())
{
subject = NormalizeBlankNode(_triplesWithBlankNodeAsObject, t.Subject.AsBlankNode(), "Magic_S");
}
if (t.Object.IsBlankNode())
{
object_ = NormalizeBlankNode(_triplesWithBlankNodeAsSubject, t.Object.AsBlankNode(), "Magic_O");
}
var nTriple = _nTriplesFormatHandler.SerializeTriple(new Triple(subject, t.Predicate, object_));
finalDigest = ByteArrayUtils.AddHashes(finalDigest, _hashCalculator.CalculateHashAsBytes(nTriple));
}
else
{
var nTriple = _nTriplesFormatHandler.SerializeTriple(t);
finalDigest = ByteArrayUtils.AddHashes(finalDigest, _hashCalculator.CalculateHashAsBytes(nTriple));
}
}
return(finalDigest.ToHexString().ToLower());
}
private BlankNode NormalizeBlankNode(Dictionary <string, List <Triple> > tripleList, BlankNode bNode, string emptyListName)
{
if (tripleList.ContainsKey(bNode.ValueAsString()))
{
var hashSum = new byte[_hashCalculator.HashSize / 8];
foreach (var ot in tripleList[bNode.ValueAsString()])
{
hashSum = ByteArrayUtils.AddHashes(hashSum, SimpleHash(ot));
}
return(new BlankNode(hashSum.ToHexString()));
}
else
{
return(new BlankNode(emptyListName));
}
}
public string CalculateHash(HashSet <Triple> triples)
{
_logger.LogDebug("Calculating hash for {0} triples.", triples.Count);
var finalDigest = new byte[_hashCalculator.HashSize / 8];
foreach (Triple triple in triples)
{
string serializedTriple = _nTriplesFormatHandler.SerializeTriple(triple);
byte[] hash = _hashCalculator.CalculateHashAsBytes(serializedTriple);
_logger.LogTrace("T: {0} || H: {1}", serializedTriple, hash.ToHexString());
finalDigest = ByteArrayUtils.AddHashes(finalDigest, hash);
}
return(finalDigest.ToHexString().ToLower());
}