/// <summary>
/// Attempts to load an Object of the given type identified by the given Node and returned as the Type that this loader generates
/// </summary>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
/// <param name="targetType">Target Type</param>
/// <param name="obj">Created Object</param>
/// <returns>True if the loader succeeded in creating an Object</returns>
public bool TryLoadObject(IGraph g, INode objNode, Type targetType, out object obj)
{
obj = null;
String server, port, db, user, pwd;
int p = -1;
//Create the URI Nodes we're going to use to search for things
INode propServer = ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyServer),
propDb = ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDatabase);
//Get Server and Database details
server = ConfigurationLoader.GetConfigurationString(g, objNode, propServer);
if (server == null)
{
server = "localhost";
}
db = ConfigurationLoader.GetConfigurationString(g, objNode, propDb);
if (db == null)
{
db = VirtuosoManager.DefaultDB;
}
//Get Port
port = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyPort));
if (!Int32.TryParse(port, out p))
{
p = VirtuosoManager.DefaultPort;
}
//Get user credentials
ConfigurationLoader.GetUsernameAndPassword(g, objNode, true, out user, out pwd);
if (user == null || pwd == null)
{
return(false);
}
//Based on this information create a Manager if possible
switch (targetType.FullName)
{
case NonNativeVirtuosoManager:
obj = new NonNativeVirtuosoManager(server, p, db, user, pwd);
break;
case Virtuoso:
//Get Server settings
server = ConfigurationLoader.GetConfigurationString(g, objNode, propServer);
if (server == null)
{
return(false);
}
obj = new VirtuosoManager(server, p, db, user, pwd);
break;
}
return(obj != null);
}
public static void Main(String[] args)
{
StreamWriter output = new StreamWriter("VirtuosoTest.txt");
Console.SetOut(output);
try
{
Console.WriteLine("##Virtuoso Test Suite");
Console.WriteLine();
//Do some basic operations
Console.WriteLine("# Basic Read and Write of normal Graphs");
//Read in a Test Graph from a Turtle File
Graph g = new Graph();
g.BaseURI = new Uri("http://www.dotnetrdf.org/Tests/SQLStore/");
TurtleParser ttlparser = new TurtleParser();
ttlparser.Load(g, "InferenceTest.ttl");
Console.WriteLine("Loaded the InferenceTest.ttl file as the Test Graph");
Console.WriteLine("Attempting to save into the SQL Store");
//Get the Non Native Virtuoso Manager
NonNativeVirtuosoManager manager = new NonNativeVirtuosoManager("localhost", 1111, "dotnetrdf_experimental", "dba", "20sQl09");
//Save to a Store using SqlWriter
SqlWriter sqlwriter = new SqlWriter(manager);
sqlwriter.Save(g, false);
Console.WriteLine("Saved to the SQL Store");
//Read back from the Store using SqlReader
Graph h = new Graph();
Console.WriteLine("Trying to read the Graph back from the SQL Store");
SqlReader sqlreader = new SqlReader(manager);
h = sqlreader.Load("http://www.dotnetrdf.org/Tests/SQLStore/");
Console.WriteLine("Read from SQL Store OK");
foreach (String prefix in h.NamespaceMap.Prefixes)
{
Console.WriteLine(prefix + ": <" + h.NamespaceMap.GetNamespaceURI(prefix).ToString() + ">");
}
Console.WriteLine();
foreach (Triple t in h.Triples)
{
Console.WriteLine(t.ToString());
}
Console.WriteLine("# Test Passed");
Console.WriteLine();
//Demonstrate that the SqlGraph persists stuff to the Store
Console.WriteLine("# Advanced Read and Write with a SQLGraph");
SqlGraph s = new SqlGraph(new Uri("http://www.dotnetrdf.org/Tests/SQLStore"), manager);
Console.WriteLine("Opened the SQL Graph OK");
INode type = s.CreateURINode("rdf:type");
s.Assert(new Triple(type, type, type));
Console.WriteLine("Asserted something");
s.NamespaceMap.AddNamespace("ex", new Uri("http://www.example.org/"));
Console.WriteLine("Added a Namespace");
s.NamespaceMap.AddNamespace("ex", new Uri("http://www.example.org/changedNamespace/"));
Console.WriteLine("Changed a Namespace");
Console.WriteLine("Reopening to see if stuff gets loaded correctly");
s = new SqlGraph(new Uri("http://www.dotnetrdf.org/Tests/SQLStore"), "dotnetrdf_experimental", "sa", "20sQl08");
foreach (String prefix in s.NamespaceMap.Prefixes)
{
Console.WriteLine(prefix + ": <" + s.NamespaceMap.GetNamespaceURI(prefix).ToString() + ">");
}
Console.WriteLine();
foreach (Triple t in s.Triples)
{
Console.WriteLine(t.ToString());
}
Console.WriteLine();
s.Retract(new Triple(type, type, type));
Console.WriteLine("Retracted something");
foreach (Triple t in s.Triples)
{
Console.WriteLine(t.ToString());
}
}
catch (OpenLink.Data.Virtuoso.VirtuosoException virtEx)
{
reportError(output, "Virtuoso Exception", virtEx);
}
catch (System.Data.SqlClient.SqlException sqlEx)
{
reportError(output, "SQL Exception", sqlEx);
}
catch (IOException ioEx)
{
reportError(output, "IO Exception", ioEx);
}
catch (RDFParseException parseEx)
{
reportError(output, "Parsing Exception", parseEx);
}
catch (RDFException rdfEx)
{
reportError(output, "RDF Exception", rdfEx);
}
catch (Exception ex)
{
reportError(output, "Other Exception", ex);
}
finally
{
output.Close();
}
}
