private void DisableFullTextIndex()
{
if (this._dataset is WebDemandDataset)
{
WebDemandDataset ds = (WebDemandDataset)this._dataset;
if (ds.UnderlyingDataset is FullTextIndexedDataset)
{
this._dataset = ds.UnderlyingDataset;
this.DisableFullTextIndex();
this._dataset = new WebDemandDataset(this._dataset);
}
}
else if (this._dataset is FullTextIndexedDataset)
{
SparqlOptimiser.RemoveOptimiser(this._ftOptimiser);
this._ftOptimiser = null;
this._ftSearcher.Dispose();
this._ftSearcher = null;
this._dataset = ((FullTextIndexedDataset)this._dataset).UnderlyingDataset;
this._ftIndexer.Dispose();
this._ftIndexer = null;
this._ftIndex.Dispose();
this._ftIndex = null;
}
this._processor = new LeviathanQueryProcessor(this._dataset);
}
private void EnableFullTextIndex()
{
if (this._dataset is FullTextIndexedDataset)
{
//Nothing to do
}
else if (this._dataset is WebDemandDataset)
{
WebDemandDataset ds = (WebDemandDataset)this._dataset;
this._dataset = ds.UnderlyingDataset;
this.EnableFullTextIndex();
this._dataset = new WebDemandDataset(this._dataset);
}
else
{
//Create and ensure index ready for use
this._ftIndex = new RAMDirectory();
var writer = new IndexWriter(this._ftIndex, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30), IndexWriter.MaxFieldLength.UNLIMITED);
writer.Dispose();
//Create Indexer and wrap dataset
this._ftIndexer = new LuceneObjectsIndexer(this._ftIndex, new StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30), new DefaultIndexSchema());
if (this._dataset is WebDemandDataset)
{
//Web Demand needs to go around Full Text as we want to index on demand loaded content
this._dataset = new WebDemandDataset(new FullTextIndexedDataset(((WebDemandDataset)this._dataset).UnderlyingDataset, this._ftIndexer, true));
}
else
{
this._dataset = new FullTextIndexedDataset(this._dataset, this._ftIndexer, true);
}
//Create and Register Optimizer
this._ftSearcher = new LuceneSearchProvider(Lucene.Net.Util.Version.LUCENE_29, this._ftIndex);
this._ftOptimiser = new FullTextOptimiser(this._ftSearcher);
SparqlOptimiser.AddOptimiser(this._ftOptimiser);
}
this._processor = new LeviathanQueryProcessor(this._dataset);
}
/// <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;
bool unionDefGraph = ConfigurationLoader.GetConfigurationBoolean(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUnionDefaultGraph)), false);
INode defaultGraphNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyDefaultGraphUri)));
Uri defaultGraph = (defaultGraphNode != null && defaultGraphNode.NodeType == NodeType.Uri ? ((IUriNode)defaultGraphNode).Uri : null);
INode storeNode;
switch (targetType.FullName)
{
case InMemoryDataset:
storeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingStore)));
if (storeNode == null)
{
obj = new InMemoryDataset();
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, storeNode);
if (temp is IInMemoryQueryableStore)
{
if (unionDefGraph)
{
obj = new InMemoryDataset((IInMemoryQueryableStore)temp, unionDefGraph);
}
else if (defaultGraph != null)
{
obj = new InMemoryDataset((IInMemoryQueryableStore)temp, defaultGraph);
}
else
{
obj = new InMemoryDataset((IInMemoryQueryableStore)temp);
}
}
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");
}
}
break;
case InMemoryQuadDataset:
storeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingStore)));
if (storeNode == null)
{
obj = new InMemoryQuadDataset();
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, storeNode);
if (temp is IInMemoryQueryableStore)
{
obj = new InMemoryQuadDataset((IInMemoryQueryableStore)temp);
}
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");
}
}
break;
case WebDemandDataset:
storeNode = ConfigurationLoader.GetConfigurationNode(g, objNode, g.CreateUriNode(UriFactory.Create(ConfigurationLoader.PropertyUsingDataset)));
if (storeNode == null)
{
obj = new WebDemandDataset(new InMemoryQuadDataset());
}
else
{
Object temp = ConfigurationLoader.LoadObject(g, storeNode);
if (temp is ISparqlDataset)
{
obj = new WebDemandDataset((ISparqlDataset)temp);
}
else
{
throw new DotNetRdfConfigurationException("Unable to load the Web Demand Dataset identified by the Node '" + objNode.ToString() + "' since the Object pointed to by the dnr:usingDataset property could not be loaded as an object which implements the ISparqlDataset interface");
}
}
break;
}
return(obj != null);
}
