public void ToHandler(IRdfHandler handler, IDocument <Document, Document> document)
{
Document mongoDoc = document.BeginRead();
Document lookup = new Document();
lookup["graphuri"] = mongoDoc["uri"];
document.EndRead();
IEnumerable <Triple> ts = new MongoDBTripleCentricEnumerable(this._manager, lookup);
handler.Apply(ts);
}
public void ToGraph(IGraph g, IDocument <Document, Document> document)
{
Document mongoDoc = document.BeginRead();
Document lookup = new Document();
lookup["graphuri"] = mongoDoc["uri"];
document.EndRead();
IEnumerable <Triple> ts = new MongoDBTripleCentricEnumerable(this._manager, lookup);
foreach (Triple t in ts)
{
g.Assert(Tools.CopyTriple(t, g));
}
}
public void ToHandler(IRdfHandler handler, IDocument <Document, Document> document)
{
//Get our JSON String
Document mongoDoc = document.BeginRead();
String json = MongoDBHelper.DocumentListToJsonArray(mongoDoc["graph"]);
document.EndRead();
if (json.Equals(String.Empty))
{
return;
}
//Then parse this
this._parser.Load(handler, new StringReader(json));
}
public void DeleteTriples(IEnumerable <Triple> ts, IDocument <Document, Document> document)
{
Document mongoDoc = document.BeginRead();
String graphUri = (String)mongoDoc["uri"];
document.EndRead();
foreach (Triple t in ts)
{
Document tripleDoc = new Document();
tripleDoc["subject"] = this._formatter.Format(t.Subject);
tripleDoc["predicate"] = this._formatter.Format(t.Predicate);
tripleDoc["object"] = this._formatter.Format(t.Object);
tripleDoc["graphuri"] = graphUri;
this._manager.Database[this._manager.Collection].Delete(tripleDoc);
}
}
public virtual void ToHandler(IRdfHandler handler, IDocument <StreamReader, TextWriter> document)
{
if (document.Exists)
{
try
{
this._parser.Load(handler, document.BeginRead());
document.EndRead();
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndRead();
throw new AlexandriaException("Error reading Document " + document.Name + " with a RDF Handler", ex);
}
}
}
public virtual void ToGraph(IGraph g, IDocument <StreamReader, TextWriter> document)
{
if (document.Exists)
{
try
{
this._parser.Load(g, document.BeginRead());
document.EndRead();
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndRead();
throw new AlexandriaException("Error reading Document " + document.Name + " into a Graph", ex);
}
}
}
public void AppendTriples(IEnumerable <Triple> ts, IDocument <Document, Document> document)
{
Document mongoDoc = document.BeginRead();
String graphUri = (String)mongoDoc["uri"];
document.EndRead();
foreach (Triple t in ts)
{
Document tripleDoc = new Document();
tripleDoc["subject"] = this._formatter.Format(t.Subject);
tripleDoc["predicate"] = this._formatter.Format(t.Predicate);
tripleDoc["object"] = this._formatter.Format(t.Object);
tripleDoc["graphuri"] = graphUri;
//Only Save if not already in Store
if (this._manager.Database[this._manager.Collection].FindOne(tripleDoc) == null)
{
this._manager.Database[this._manager.Collection].Save(tripleDoc);
}
}
}
public override void DeleteTriples(IEnumerable <Triple> ts, IDocument <StreamReader, TextWriter> document)
{
if (!ts.Any())
{
return;
}
//Generate the String forms of these Triples
HashSet <String> triples = new HashSet <string>();
foreach (Triple t in ts)
{
triples.Add(this._formatter.Format(t));
}
try
{
//Now read through the file line by line
int lineCount = 0, editedLineCount = 0;
StringBuilder editedOutput = new StringBuilder();
StreamReader reader = document.BeginRead();
while (!reader.EndOfStream)
{
lineCount++;
String line = reader.ReadLine();
//If the Line is a Triple that isn't marked for deletion we pass it through to our edited output
if (!triples.Contains(line))
{
editedOutput.AppendLine(line);
editedLineCount++;
}
}
reader.Close();
document.EndRead();
if (lineCount > editedLineCount || lineCount == 0)
{
//We deleted some Triples so need to reserialize the data
try
{
if (editedLineCount > 0)
{
TextWriter writer = document.BeginWrite(false);
writer.Write(editedOutput.ToString());
writer.Close();
document.EndWrite();
}
else
{
//If there are no lines in the result then delete the document
document.DocumentManager.ReleaseDocument(document.Name);
document.DocumentManager.DeleteDocument(document.Name);
}
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndWrite();
throw new AlexandriaException("Error deleting Triples from Document " + document.Name, ex);
}
}
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndRead();
throw new AlexandriaException("Error deleting Triples from Document " + document.Name, ex);
}
}
public override void DeleteTriples(IEnumerable<Triple> ts, IDocument<StreamReader,TextWriter> document)
{
if (!ts.Any()) return;
//Generate the String forms of these Triples
HashSet<String> triples = new HashSet<string>();
foreach (Triple t in ts)
{
triples.Add(this._formatter.Format(t));
}
try
{
//Now read through the file line by line
int lineCount = 0, editedLineCount = 0;
StringBuilder editedOutput = new StringBuilder();
StreamReader reader = document.BeginRead();
while (!reader.EndOfStream)
{
lineCount++;
String line = reader.ReadLine();
//If the Line is a Triple that isn't marked for deletion we pass it through to our edited output
if (!triples.Contains(line))
{
editedOutput.AppendLine(line);
editedLineCount++;
}
}
reader.Close();
document.EndRead();
if (lineCount > editedLineCount || lineCount == 0)
{
//We deleted some Triples so need to reserialize the data
try
{
if (editedLineCount > 0)
{
TextWriter writer = document.BeginWrite(false);
writer.Write(editedOutput.ToString());
writer.Close();
document.EndWrite();
}
else
{
//If there are no lines in the result then delete the document
document.DocumentManager.ReleaseDocument(document.Name);
document.DocumentManager.DeleteDocument(document.Name);
}
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndWrite();
throw new AlexandriaException("Error deleting Triples from Document " + document.Name, ex);
}
}
}
catch (AlexandriaException)
{
throw;
}
catch (Exception ex)
{
document.EndRead();
throw new AlexandriaException("Error deleting Triples from Document " + document.Name, ex);
}
}
