public void LoadFromFile(string filePath, DatasourceFileType fileType)
{
try
{
switch (fileType)
{
case DatasourceFileType.Rdfxml: // RDF/XML
RdfXmlParser rdfXmlParser = new RdfXmlParser(RdfXmlParserMode.Streaming);
myGraph = new Graph();
rdfXmlParser.Load(myGraph, filePath);
break;
case DatasourceFileType.NTriples: // NTriples
NTriplesParser ntp = new NTriplesParser();
myGraph = new Graph();
ntp.Load(myGraph, filePath);
break;
}
}
catch (Exception ex)
{
MySoapFault fault = new MySoapFault();
fault.Operation = "LoadFromFile";
fault.Reason = "Error in loading datasource file into graph .";
fault.Details = ex.Message;
fault.MoreDetails = ex.StackTrace;
throw new FaultException <MySoapFault>(fault);
}
}
public void SaveToFile(string filePath, DatasourceFileType fileType)
{
try
{
switch (fileType)
{
case DatasourceFileType.Rdfxml: // RDF/XML
FastRdfXmlWriter rxtw = new FastRdfXmlWriter();
rxtw.Save(myGraph, filePath);
break;
case DatasourceFileType.NTriples: // NTriples
NTriplesWriter wr = new NTriplesWriter();
wr.Save(myGraph, filePath);
break;
}
}
catch (Exception ex)
{
MySoapFault fault = new MySoapFault();
fault.Operation = "SaveToFile";
fault.Reason = "Error in saving datasource from graph to file .";
fault.Details = ex.Message;
fault.MoreDetails = ex.StackTrace;
throw new FaultException <MySoapFault>(fault);
}
}
public MyResults ExceuteQuery(string query)
{
try
{
SparqlResultSet res = (SparqlResultSet)myGraph.ExecuteQuery(query);
MyResults results = new MyResults();
results.query = query;
results.items = new QueryResult[res.Results.Count];
for (int i = 0; i < res.Results.Count; i++)
{
results.items[i] = new QueryResult
{
variables = res.Results[i].Variables.ToArray(),
result = res.Results[i].ToString()
};
}
return(results);
}
catch (Exception ex)
{
MySoapFault fault = new MySoapFault();
fault.Operation = "ExceuteQuery";
fault.Reason = "Error in executing sparql query in linked data graph .";
fault.Details = ex.Message;
fault.MoreDetails = ex.StackTrace;
throw new FaultException <MySoapFault>(fault);
}
}
