/**
* Choose a graph from a DatasetGraph. If it's the union, provide a union graph (not always the
* best way to deal with union).
*
* @param dataset
* @param graphNode
* @return Graph
*/
protected static Graph chooseGraph(DatasetGraph dataset, Node graphNode) {
if (graphNode == null) return dataset.getDefaultGraph();
else if (Var.isVar(graphNode))
throw new NotImplemented("Choosing a graph OpExecutorStage.executeBlockFilter[Variable]");
else if (graphNode == Node.ANY)
throw new NotImplemented("OpExecutorMain.executeBlockFilter[Node.ANY]");
else if (Quad.isUnionGraph(graphNode)) {
// TODO Check this! Work needed here to consolidate union graph handling.
List<Node> graphs = Iter.toList(dataset.listGraphNodes());
return new GraphUnionRead(dataset, graphs);
} else return dataset.getGraph(graphNode);
}
private static TextIndex chooseTextIndex(DatasetGraph dsg) {
Context c = dsg.getContext();
Object obj = dsg.getContext().get(TextQuery.textIndex);
if (obj != null) {
try {
return (TextIndex) obj;
} catch (ClassCastException ex) {
Log.warn(
TextQueryPF.class, "Context setting '" + TextQuery.textIndex + "'is not a TextIndex");
}
}
if (dsg instanceof DatasetGraphText) {
DatasetGraphText x = (DatasetGraphText) dsg;
return x.getTextIndex();
}
Log.warn(
TextQueryPF.class,
"Failed to find the text index : tried context and as a text-enabled dataset");
return null;
}
