public void ConfigurationLookupValue4()
{
Graph g = new Graph();
String value = ConfigurationLoader.GetConfigurationValue(g, g.CreateBlankNode("a"), g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyType)));
Assert.Null(value);
}
public void ConfigurationLookupValue2()
{
String graph = Prefixes + @"
_:a dnr:type <http://uri> .";
Graph g = new Graph();
g.LoadFromString(graph);
String value = ConfigurationLoader.GetConfigurationValue(g, g.GetBlankNode("a"), g.CreateUriNode("dnr:type"));
Assert.Equal("http://uri/", value);
}
public void ConfigurationLookupValue1()
{
String graph = Prefixes + @"
_:a dnr:type ""literal"" .";
Graph g = new Graph();
g.LoadFromString(graph);
String value = ConfigurationLoader.GetConfigurationValue(g, g.GetBlankNode("a"), g.CreateUriNode("dnr:type"));
Assert.AreEqual("literal", value);
}
public void ConfigurationLookupValue3()
{
String graph = Prefixes + @"
_:a dnr:type <appsetting:ConfigurationLookupString3> .";
Graph g = new Graph();
g.LoadFromString(graph);
_testSettings.SettSetting("ConfigurationLookupString3", "literal");
String value = ConfigurationLoader.GetConfigurationValue(g, g.GetBlankNode("a"), g.CreateUriNode("dnr:type"));
Assert.Equal("literal", value);
}
public void ConfigurationLookupValue3()
{
String graph = Prefixes + @"
_:a dnr:type <appsetting:ConfigurationLookupString3> .";
Graph g = new Graph();
g.LoadFromString(graph);
System.Configuration.ConfigurationManager.AppSettings["ConfigurationLookupString3"] = "literal";
String value = ConfigurationLoader.GetConfigurationValue(g, g.GetBlankNode("a"), g.CreateUriNode("dnr:type"));
Assert.AreEqual("literal", value);
}
/// <summary>
/// Tries to load a SPARQL Endpoint 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)
{
BaseEndpoint endpoint = null;
obj = null;
switch (targetType.FullName)
{
case QueryEndpoint:
String queryEndpointUri = ConfigurationLoader.GetConfigurationValue(g, objNode, new INode[] { g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyQueryEndpointUri)), g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyEndpointUri)) });
if (queryEndpointUri == null)
{
return(false);
}
// Get Default/Named Graphs if specified
IEnumerable <String> defaultGraphs = from n in ConfigurationLoader.GetConfigurationData(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyDefaultGraphUri)))
select n.ToString();
IEnumerable <String> namedGraphs = from n in ConfigurationLoader.GetConfigurationData(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyNamedGraphUri)))
select n.ToString();
endpoint = new SparqlRemoteEndpoint(UriFactory.Create(queryEndpointUri), defaultGraphs, namedGraphs);
break;
case UpdateEndpoint:
String updateEndpointUri = ConfigurationLoader.GetConfigurationValue(g, objNode, new INode[] { g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUpdateEndpointUri)), g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyEndpointUri)) });
if (updateEndpointUri == null)
{
return(false);
}
endpoint = new SparqlRemoteUpdateEndpoint(UriFactory.Create(updateEndpointUri));
break;
case FederatedEndpoint:
IEnumerable <INode> endpoints = ConfigurationLoader.GetConfigurationData(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyQueryEndpoint)))
.Concat(ConfigurationLoader.GetConfigurationData(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyEndpoint))));
foreach (INode e in endpoints)
{
Object temp = ConfigurationLoader.LoadObject(g, e);
if (temp is SparqlRemoteEndpoint)
{
if (endpoint == null)
{
endpoint = new FederatedSparqlRemoteEndpoint((SparqlRemoteEndpoint)temp);
}
else
{
((FederatedSparqlRemoteEndpoint)endpoint).AddEndpoint((SparqlRemoteEndpoint)temp);
}
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the SPARQL Endpoint identified by the Node '" + e.ToString() + "' as one of the values for the dnr:queryEndpoint/dnr:endpoint property points to an Object which cannot be loaded as an object which is a SparqlRemoteEndpoint");
}
}
break;
}
if (endpoint != null)
{
// Are there any credentials specified?
String user, pwd;
ConfigurationLoader.GetUsernameAndPassword(g, objNode, true, out user, out pwd);
if (user != null && pwd != null)
{
endpoint.SetCredentials(user, pwd);
}
// Is there a Proxy Server specified
INode proxyNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyProxy)));
if (proxyNode != null)
{
Object proxy = ConfigurationLoader.LoadObject(g, proxyNode);
if (proxy is IWebProxy)
{
endpoint.Proxy = (IWebProxy)proxy;
// Are we supposed to use the same credentials for the proxy as for the endpoint?
bool useCredentialsForProxy = ConfigurationLoader.GetConfigurationBoolean(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUseCredentialsForProxy)), false);
if (useCredentialsForProxy)
{
endpoint.UseCredentialsForProxy = true;
}
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Endpoint identified by the Node '" + objNode.ToString() + "' as the value for the dnr:proxy property points to an Object which cannot be loaded as an object of type WebProxy");
}
}
}
obj = endpoint;
return(endpoint != null);
}
/// <summary>
/// Creates a new Base SPARQL Server Configuration based on information from a Configuration Graph
/// </summary>
/// <param name="context">HTTP Context</param>
/// <param name="g">Configuration Graph</param>
/// <param name="objNode">Object Node</param>
public BaseSparqlServerConfiguration(HttpContext context, IGraph g, INode objNode)
: base(context, g, objNode)
{
//Get the Query Processor to be used
INode procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlQueryProcessor)
{
this._queryProcessor = (ISparqlQueryProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:queryProcessor property which cannot be loaded as an object which implements the ISparqlQueryProcessor interface");
}
}
//SPARQL Query Default Config
this._defaultGraph = ConfigurationLoader.GetConfigurationValue(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultGraphUri)).ToSafeString();
this._defaultTimeout = ConfigurationLoader.GetConfigurationInt64(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyTimeout), this._defaultTimeout);
this._defaultPartialResults = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyPartialResults), this._defaultPartialResults);
//Handler Configuration
this._showQueryForm = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyShowQueryForm), this._showQueryForm);
String defQueryFile = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultQueryFile));
if (defQueryFile != null)
{
defQueryFile = ConfigurationLoader.ResolvePath(defQueryFile);
if (File.Exists(defQueryFile))
{
using (StreamReader reader = new StreamReader(defQueryFile))
{
this._defaultQuery = reader.ReadToEnd();
reader.Close();
}
}
}
//Get Query Syntax to use
try
{
String syntaxSetting = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertySyntax));
if (syntaxSetting != null)
{
this._syntax = (SparqlQuerySyntax)Enum.Parse(typeof(SparqlQuerySyntax), syntaxSetting);
}
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Syntax for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:syntax property was not a valid value from the enum VDS.RDF.Parsing.SparqlQuerySyntax", ex);
}
//Get the SPARQL Describe Algorithm
INode describeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDescribeAlgorithm));
if (describeNode != null)
{
if (describeNode.NodeType == NodeType.Literal)
{
String algoClass = ((ILiteralNode)describeNode).Value;
try
{
Object desc = Activator.CreateInstance(Type.GetType(algoClass));
if (desc is ISparqlDescribe)
{
this._describer = (ISparqlDescribe)desc;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name of a type that implements the ISparqlDescribe interface");
}
}
catch (DotNetRdfConfigurationException)
{
throw;
}
catch (Exception ex)
{
throw new DotNetRdfConfigurationException("Unable to set the Describe Algorithm for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:describeAlgorithm property was not a type name for a type that can be instantiated", ex);
}
}
}
//Get the Query Optimiser
INode queryOptNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyQueryOptimiser));
if (queryOptNode != null)
{
Object queryOpt = ConfigurationLoader.LoadObject(g, queryOptNode);
if (queryOpt is IQueryOptimiser)
{
this._queryOptimiser = (IQueryOptimiser)queryOpt;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Query Optimiser for the HTTP Handler identified by the Node '" + queryOptNode.ToString() + "' as the value given for the dnr:queryOptimiser property points to an Object which could not be loaded as an object which implements the required IQueryOptimiser interface");
}
}
//Get the Algebra Optimisers
foreach (INode algOptNode in ConfigurationLoader.GetConfigurationData(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyAlgebraOptimiser)))
{
Object algOpt = ConfigurationLoader.LoadObject(g, algOptNode);
if (algOpt is IAlgebraOptimiser)
{
this._algebraOptimisers.Add((IAlgebraOptimiser)algOpt);
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Algebra Optimiser for the HTTP Handler identified by the Node '" + algOptNode.ToString() + "' as the value given for the dnr:algebraOptimiser property points to an Object which could not be loaded as an object which implements the required IAlgebraOptimiser interface");
}
}
//Then get the Update Processor to be used
procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyUpdateProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlUpdateProcessor)
{
this._updateProcessor = (ISparqlUpdateProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:updateProcessor property which cannot be loaded as an object which implements the ISparqlUpdateProcessor interface");
}
}
//Handler Settings
this._showUpdateForm = ConfigurationLoader.GetConfigurationBoolean(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyShowUpdateForm), this._showUpdateForm);
String defUpdateFile = ConfigurationLoader.GetConfigurationString(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyDefaultUpdateFile));
if (defUpdateFile != null)
{
defUpdateFile = ConfigurationLoader.ResolvePath(defUpdateFile);
if (File.Exists(defUpdateFile))
{
using (StreamReader reader = new StreamReader(defUpdateFile))
{
this._defaultUpdate = reader.ReadToEnd();
reader.Close();
}
}
}
//Then get the Protocol Processor to be used
procNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyProtocolProcessor));
if (procNode != null)
{
Object temp = ConfigurationLoader.LoadObject(g, procNode);
if (temp is ISparqlHttpProtocolProcessor)
{
this._protocolProcessor = (ISparqlHttpProtocolProcessor)temp;
}
else
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file specifies a value for the Handlers dnr:protocolProcessor property which cannot be loaded as an object which implements the ISparqlHttpProtocolProcessor interface");
}
}
if (this._queryProcessor == null && this._updateProcessor == null && this._protocolProcessor == null)
{
throw new DotNetRdfConfigurationException("Unable to load SPARQL Server Configuration as the RDF configuration file does not specify at least one of a Query/Update/Protocol processor for the server using the dnr:queryProcessor/dnr:updateProcessor/dnr:protocolProcessor properties");
}
//Get the Service Description Graph
INode descripNode = ConfigurationLoader.GetConfigurationNode(g, objNode, ConfigurationLoader.CreateConfigurationNode(g, ConfigurationLoader.PropertyServiceDescription));
if (descripNode != null)
{
Object descrip = ConfigurationLoader.LoadObject(g, descripNode);
if (descrip is IGraph)
{
this._serviceDescription = (IGraph)descrip;
}
else
{
throw new DotNetRdfConfigurationException("Unable to set the Service Description Graph for the HTTP Handler identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:serviceDescription property points to an Object which could not be loaded as an object which implements the required IGraph interface");
}
}
}
/// <summary>
/// Tries to load a SPARQL Query Processor 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;
ISparqlQueryProcessor processor = null;
INode storeObj;
Object temp;
INode propStorageProvider = g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyStorageProvider));
switch (targetType.FullName)
{
case LeviathanQueryProcessor:
INode datasetObj = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingDataset)));
if (datasetObj != null)
{
temp = ConfigurationLoader.LoadObject(g, datasetObj);
if (temp is ISparqlDataset)
{
processor = new LeviathanQueryProcessor((ISparqlDataset)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Leviathan Query Processor identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:usingDataset property points to an Object that cannot be loaded as an object which implements the ISparqlDataset interface");
}
}
else
{
// If no dnr:usingDataset try dnr:usingStore instead
storeObj = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingStore)));
if (storeObj == null)
{
return(false);
}
temp = ConfigurationLoader.LoadObject(g, storeObj);
if (temp is IInMemoryQueryableStore)
{
processor = new LeviathanQueryProcessor((IInMemoryQueryableStore)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Leviathan Query Processor identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:usingStore property points to an Object that cannot be loaded as an object which implements the IInMemoryQueryableStore interface");
}
}
break;
case SimpleQueryProcessor:
storeObj = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingStore)));
if (storeObj == null)
{
return(false);
}
temp = ConfigurationLoader.LoadObject(g, storeObj);
if (temp is INativelyQueryableStore)
{
processor = new SimpleQueryProcessor((INativelyQueryableStore)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Simple Query Processor identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:usingStore property points to an Object that cannot be loaded as an object which implements the INativelyQueryableStore interface");
}
break;
case GenericQueryProcessor:
INode managerObj = ConfigurationLoader.GetConfigurationNode(g, objNode, propStorageProvider);
if (managerObj == null)
{
return(false);
}
temp = ConfigurationLoader.LoadObject(g, managerObj);
if (temp is IQueryableStorage)
{
processor = new GenericQueryProcessor((IQueryableStorage)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Generic Query Processor identified by the Node '" + objNode.ToString() + "' as the value given for the dnr:genericManager property points to an Object that cannot be loaded as an object which implements the IQueryableStorage interface");
}
break;
case RemoteQueryProcessor:
INode endpointObj = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyEndpoint)));
if (endpointObj == null)
{
return(false);
}
temp = ConfigurationLoader.LoadObject(g, endpointObj);
if (temp is SparqlRemoteEndpoint)
{
processor = new RemoteQueryProcessor((SparqlRemoteEndpoint)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Remote Query Processor identified by the Node '" + objNode.ToSafeString() + "' as the value given for the dnr:endpoint property points to an Object that cannot be loaded as an object which is a SparqlRemoteEndpoint");
}
break;
case PelletQueryProcessor:
String server = ConfigurationLoader.GetConfigurationValue(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyServer)));
if (server == null)
{
return(false);
}
String kb = ConfigurationLoader.GetConfigurationString(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyStore)));
if (kb == null)
{
return(false);
}
processor = new PelletQueryProcessor(UriFactory.Create(server), kb);
break;
}
obj = processor;
return(processor != null);
}
/// <summary>
/// Tries to load a Reasoner 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;
Object output;
switch (targetType.FullName)
{
case PelletReasonerType:
String server = ConfigurationLoader.GetConfigurationValue(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyServer)));
if (server == null) return false;
String kb = ConfigurationLoader.GetConfigurationString(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyStore)));
if (kb == null) return false;
output = new PelletReasoner(UriFactory.Create(server), kb);
break;
case OwlReasonerWrapperType:
INode reasonerNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyOwlReasoner)));
if (reasonerNode == null) return false;
Object reasoner = ConfigurationLoader.LoadObject(g, reasonerNode);
if (reasoner is IOwlReasoner)
{
output = new OwlReasonerWrapper((IOwlReasoner)reasoner);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load configuration for the OWL Reasoner Wrapper identified by the Node '" + objNode.ToString() + "' as the value for the dnr:owlReasoner property points to an Object which cannot be loaded as an object which implements the IOwlReasoner interface");
}
break;
default:
// Otherwise we'll just attempt to load this as an instance of an IInferenceEngine
try
{
output = (IInferenceEngine)Activator.CreateInstance(targetType);
}
catch
{
// Any error means this loader can't load this type
return false;
}
break;
}
if (output != null)
{
if (output is IInferenceEngine)
{
// Now initialise with any specified Graphs
IEnumerable<INode> rulesGraphs = ConfigurationLoader.GetConfigurationData(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingGraph)));
foreach (INode rulesGraph in rulesGraphs)
{
Object temp = ConfigurationLoader.LoadObject(g, rulesGraph);
if (temp is IGraph)
{
((IInferenceEngine)output).Initialise((IGraph)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load Configuration for the Forward Chaining Reasoner identified by the Node '" + objNode.ToString() + "' as one of the values for the dnr:usingGraph property points to an Object which cannot be loaded as an object which implements the IGraph interface");
}
}
}
}
obj = output;
return true;
}
