Exemplo n.º 1
0
        public override void AppendTriples(IEnumerable <Triple> ts, IDocument <StreamReader, TextWriter> document)
        {
            if (!ts.Any())
            {
                return;
            }

            try
            {
                TextWriter writer = document.BeginWrite(true);
                foreach (Triple t in ts)
                {
                    writer.WriteLine(this._formatter.Format(t));
                }
                writer.Close();
                document.EndWrite();
            }
            catch (AlexandriaException)
            {
                throw;
            }
            catch (Exception ex)
            {
                document.EndWrite();
                throw new AlexandriaException("Error appending Triples to Document " + document.Name, ex);
            }
        }
Exemplo n.º 2
0
        public void DeleteTriples(IEnumerable <Triple> ts, IDocument <Document, Document> document)
        {
            //Generate the JSON String
            Graph g = new Graph();

            g.Assert(ts);
            String json = VDS.RDF.Writing.StringWriter.Write(g, this._writer);

            Object[] toDelete = MongoDBHelper.JsonArrayToObjects(json);

            //Then load the existing Triples from the Document
            Document mongoDoc = document.BeginWrite(false);

            if (mongoDoc["graph"] != null)
            {
                //Only need to do something if the Graph is non-empty
                List <Object> existing = MongoDBHelper.DocumentListToObjectList(mongoDoc["graph"]);
                foreach (Object obj in toDelete)
                {
                    existing.Remove(obj);
                }
                mongoDoc["graph"] = existing.ToArray();
            }
            document.EndWrite();
        }
Exemplo n.º 3
0
        public void ToDocument(IGraph g, IDocument <Document, Document> document)
        {
            Document mongoDoc = document.BeginWrite(false);
            //Assign URI if necessary
            String graphUri = (g.BaseUri == null) ? String.Empty : g.BaseUri.ToString();

            if (mongoDoc["uri"] == null)
            {
                mongoDoc["uri"] = graphUri;
            }
            document.EndWrite();

            //Then create and save a Document for every Triple in the Graph
            foreach (Triple t in g.Triples)
            {
                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);
                }
            }
        }
Exemplo n.º 4
0
        public void AppendTriples(IEnumerable <Triple> ts, IDocument <Document, Document> document)
        {
            //Generate our JSON String
            Graph g = new Graph();

            g.Assert(ts);
            String json = VDS.RDF.Writing.StringWriter.Write(g, this._writer);

            //Then convert this to a Document
            Document mongoDoc = document.BeginWrite(false);

            Object[] temp = MongoDBHelper.JsonArrayToObjects(json);
            if (mongoDoc["graph"] != null)
            {
                List <Object> existing = MongoDBHelper.DocumentListToObjectList(mongoDoc["graph"]);
                existing.AddRange(temp);
                mongoDoc["graph"] = existing.ToArray();
            }
            else
            {
                //If it was null this was a new Document
                mongoDoc["graph"] = temp;
            }
            document.EndWrite();
        }
Exemplo n.º 5
0
        public void ToDocument(IGraph g, IDocument <Document, Document> document)
        {
            //Generate our JSON String
            String json = VDS.RDF.Writing.StringWriter.Write(g, this._writer);

            //Then convert this to a Document
            Document mongoDoc = document.BeginWrite(false);

            mongoDoc["graph"] = MongoDBHelper.JsonArrayToObjects(json);
            document.EndWrite();
        }
Exemplo n.º 6
0
 public virtual void ToDocument(IGraph g, IDocument <StreamReader, TextWriter> document)
 {
     try
     {
         this._writer.Save(g, document.BeginWrite(false));
         document.EndWrite();
     }
     catch (AlexandriaException)
     {
         throw;
     }
     catch (Exception ex)
     {
         document.EndWrite();
         throw new AlexandriaException("Error writing Graph to Document " + document.Name, ex);
     }
 }
Exemplo n.º 7
0
        public override void AppendTriples(IEnumerable<Triple> ts, IDocument<StreamReader,TextWriter> document)
        {
            if (!ts.Any()) return;

            try
            {
                TextWriter writer = document.BeginWrite(true);
                foreach (Triple t in ts)
                {
                    writer.WriteLine(this._formatter.Format(t));
                }
                writer.Close();
                document.EndWrite();
            }
            catch (AlexandriaException)
            {
                throw;
            }
            catch (Exception ex)
            {
                document.EndWrite();
                throw new AlexandriaException("Error appending Triples to Document " + document.Name, ex);
            }
        }
Exemplo n.º 8
0
        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);
            }
        }
Exemplo n.º 9
0
        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);
            }
        }