public SparqlResult ExecuteQuery(SparqlQueryContext queryContext, IList<string> datasetGraphUris)
{
ISerializationFormat resultFormat;
var resultStream = _client.ExecuteQuery(_storeName, queryContext.SparqlQuery, datasetGraphUris, null, queryContext.SparqlResultsFormat,
queryContext.GraphResultsFormat, out resultFormat);
return new SparqlResult(resultStream, resultFormat, queryContext);
}
public SparqlResult ExecuteQuery(SparqlQueryContext queryContext, IList<string> datasetGraphUris)
{
var parser = new SparqlQueryParser();
var query = parser.ParseFromString(queryContext.SparqlQuery);
var sparqlResults = _queryProcessor.ProcessQuery(query);
return new SparqlResult(sparqlResults, queryContext);
}
internal SparqlResult(object resultObject, SparqlQueryContext sparqlQueryContext)
{
if (resultObject == null) throw new ArgumentNullException(nameof(resultObject));
if (sparqlQueryContext == null) throw new ArgumentNullException(nameof(sparqlQueryContext));
SourceSparqlQueryContext = sparqlQueryContext;
ResultGraph = resultObject as IGraph;
if (ResultGraph == null)
{
ResultSet = resultObject as SparqlResultSet;
if (ResultSet == null)
{
throw new ArgumentException(
$"Result object must be either a {typeof (IGraph).FullName} or a {typeof (SparqlResultSet).FullName} instance. Got a {resultObject.GetType().FullName}");
}
ResultFormat = sparqlQueryContext.SparqlResultsFormat ?? SparqlResultsFormat.Xml;
}
if (resultObject is IGraph)
{
ResultGraph = resultObject as IGraph;
ResultFormat = sparqlQueryContext.GraphResultsFormat ?? RdfFormat.RdfXml;
}
}
internal SparqlResult(TextReader streamReader, ISerializationFormat resultFormat,
SparqlQueryContext sparqlQueryContext)
{
ResultFormat = resultFormat;
ParseResult(streamReader);
SourceSparqlQueryContext = sparqlQueryContext;
}
public override SparqlResult ExecuteSparql(SparqlQueryContext sparqlQueryContext)
{
var resultStream = new MemoryStream();
_serverCore.Query(_storeName, sparqlQueryContext.SparqlQuery, DataSetGraphUris, null, SparqlResultsFormat.Xml,
RdfFormat.RdfXml, resultStream);
resultStream.Seek(0, SeekOrigin.Begin);
return new SparqlResult(resultStream, sparqlQueryContext);
}
internal SparqlResult(Stream resultStream, ISerializationFormat resultFormat, SparqlQueryContext sparqlQueryContext)
{
if (resultStream == null) throw new ArgumentNullException(nameof(resultStream));
ResultFormat = resultFormat;
SourceSparqlQueryContext = sparqlQueryContext;
using (var reader = new StreamReader(resultStream))
{
ParseResult(reader);
}
}
public abstract SparqlResult ExecuteSparql(SparqlQueryContext sparqlQueryContext);
public override SparqlResult ExecuteSparql(SparqlQueryContext sparqlQueryContext)
{
return new SparqlResult(Client.ExecuteQuery(sparqlQueryContext.SparqlQuery, DataSetGraphUris), sparqlQueryContext);
}
public override SparqlResult ExecuteSparql(SparqlQueryContext sparqlQueryContext)
{
return Client.ExecuteQuery(sparqlQueryContext, DataSetGraphUris);
}
private IEnumerable<Triple> GetTriplesForDataObject(string identity)
{
var queryContext = new SparqlQueryContext(string.Format(QueryTemplate, identity));
queryContext.SparqlResultsFormat = SparqlResultsFormat.Xml;
queryContext.GraphResultsFormat = RdfFormat.NTriples;
var results = Client.ExecuteQuery(queryContext, DataSetGraphUris);
foreach(var row in results.ResultSet)
{
// create new triple
var triple = new Triple
{
Subject = identity,
Graph = row["g"].ToString(),
Predicate = row["p"].ToString()
};
var literal = row["o"] as ILiteralNode;
if (literal != null)
{
var dt = literal.DataType?.ToString();
triple.LangCode = literal.Language;
triple.DataType = dt ?? RdfDatatypes.String;
triple.Object = literal.Value;
triple.IsLiteral = true;
}
else
{
triple.Object = row["o"].ToString().Trim();
}
yield return triple;
}
}
internal SparqlResult(string xml, SparqlQueryContext sparqlQueryContext)
{
_resultString = xml;
SourceSparqlQueryContext = sparqlQueryContext;
}
internal SparqlResult(Stream resultStream, SparqlQueryContext sparqlQueryContext)
{
_resultStream = resultStream;
SourceSparqlQueryContext = sparqlQueryContext;
}
internal SparqlResult(string resultString, ISerializationFormat resultFormat, SparqlQueryContext sparqlQueryContext) :
this(new StringReader(resultString), resultFormat, sparqlQueryContext )
{
}
