public void SparqlDefaultGraphExists3()
{
SqlDataset dataset = new SqlDataset(new MicrosoftSqlStoreManager("localhost", "unit_test", "example", "password"));
//Create Default Graph only if required
if (!dataset.HasGraph(null))
{
Graph g = new Graph();
g.Assert(g.CreateUriNode(new Uri("http://example.org/subject")), g.CreateUriNode(new Uri("http://example.org/predicate")), g.CreateUriNode(new Uri("http://example.org/object")));
dataset.AddGraph(g);
dataset.Flush();
}
SparqlQueryParser parser = new SparqlQueryParser();
SparqlQuery q = parser.ParseFromString("ASK WHERE { GRAPH ?g { ?s ?p ?o }}");
LeviathanQueryProcessor lvn = new LeviathanQueryProcessor(dataset);
Object results = lvn.ProcessQuery(q);
if (results is SparqlResultSet)
{
Assert.IsTrue(((SparqlResultSet)results).Result);
}
else
{
Assert.Fail("ASK Query did not return a SPARQL Result Set as expected");
}
dataset.Flush();
}
/// <summary>
/// Tries to load a SPARQL Dataset based on information from the Configuration Graph
/// </summary>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
/// <param name="targetType">Target Type</param>
/// <param name="obj">Output Object</param>
/// <returns></returns>
public bool TryLoadObject(IGraph g, INode objNode, Type targetType, out object obj)
{
obj = null;
switch (targetType.FullName)
{
case InMemoryDataset:
INode storeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyUsingStore));
if (storeNode == null)
{
throw new DotNetRdfConfigurationException("Unable to load the In-Memory Dataset identified by the Node '" + objNode.ToString() + "' since there was no value given for the required property dnr:usingStore");
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, storeNode);
if (temp is IInMemoryQueryableStore)
{
obj = new InMemoryDataset((IInMemoryQueryableStore)temp);
return(true);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the In-Memory Dataset identified by the Node '" + objNode.ToString() + "' since the Object pointed to by the dnr:usingStore property could not be loaded as an object which implements the IInMemoryQueryableStore interface");
}
}
#if !NO_DATA && !NO_STORAGE
case SqlDataset:
INode sqlManager = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertySqlManager));
if (sqlManager == null)
{
throw new DotNetRdfConfigurationException("Unable to load the SQL Dataset identified by the Node '" + objNode.ToString() + "' since there was no value given for the required property dnr:sqlManager");
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, sqlManager);
if (temp is IDotNetRDFStoreManager)
{
obj = new SqlDataset((IDotNetRDFStoreManager)temp);
return(true);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the SQL Dataset identified by the Node '" + objNode.ToString() + "' since the Object pointed to by the dnr:sqlManager property could not be laoded as an object which implements the IDotNetRDFStoreManager interface");
}
}
#endif
}
return(false);
}
/// <summary>
/// Tries to load a SPARQL Dataset based on information from the Configuration Graph
/// </summary>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
/// <param name="targetType">Target Type</param>
/// <param name="obj">Output Object</param>
/// <returns></returns>
public bool TryLoadObject(IGraph g, INode objNode, Type targetType, out object obj)
{
obj = null;
switch (targetType.FullName)
{
case InMemoryDataset:
INode storeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyUsingStore));
if (storeNode == null)
{
throw new DotNetRdfConfigurationException("Unable to load the In-Memory Dataset identified by the Node '" + objNode.ToString() + "' since there was no value given for the required property dnr:usingStore");
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, storeNode);
if (temp is IInMemoryQueryableStore)
{
obj = new InMemoryDataset((IInMemoryQueryableStore)temp);
return true;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the In-Memory Dataset identified by the Node '" + objNode.ToString() + "' since the Object pointed to by the dnr:usingStore property could not be loaded as an object which implements the IInMemoryQueryableStore interface");
}
}
#if !NO_DATA && !NO_STORAGE
case SqlDataset:
INode sqlManager = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertySqlManager));
if (sqlManager == null)
{
throw new DotNetRdfConfigurationException("Unable to load the SQL Dataset identified by the Node '" + objNode.ToString() + "' since there was no value given for the required property dnr:sqlManager");
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, sqlManager);
if (temp is IDotNetRDFStoreManager)
{
obj = new SqlDataset((IDotNetRDFStoreManager)temp);
return true;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the SQL Dataset identified by the Node '" + objNode.ToString() + "' since the Object pointed to by the dnr:sqlManager property could not be laoded as an object which implements the IDotNetRDFStoreManager interface");
}
}
#endif
}
return false;
}
