void WriteGraph(RdfGraph graph, RdfSourceWrapper sourcewrapper, StatementSink sink) { java.util.Iterator iter = graph.iterator(); while (iter.hasNext()) { GraphStatement stmt = (GraphStatement)iter.next(); Statement s; if (stmt is GraphStatementWrapper) { s = ((GraphStatementWrapper)stmt).s; } else { s = new Statement( sourcewrapper.ToEntity(stmt.getSubject()), sourcewrapper.ToEntity(stmt.getPredicate()), sourcewrapper.ToResource(stmt.getObject()), stmt.getGraphName() == null ? Statement.DefaultMeta : sourcewrapper.ToEntity(stmt.getGraphName())); } if (s.AnyNull) { continue; // unbound variable, or literal in bad position } sink.Add(s); } }
public void Describe(SelectableSource source, StatementSink sink) { if (!(query is DescribeQuery)) { throw new InvalidOperationException("Only DESCRIBE queries are supported by this method (" + query.GetType() + ")."); } DescribeQuery q = (DescribeQuery)query; RdfSourceWrapper sourcewrapper = new RdfSourceWrapper(source, QueryMeta, this); RdfGraph graph = q.execute(sourcewrapper); WriteGraph(graph, sourcewrapper, sink); }
public void Construct(SelectableSource source, StatementSink sink) { if (!(query is ConstructQuery)) { throw new InvalidOperationException("Only CONSTRUCT queries are supported by this method (" + query.GetType() + ")."); } ConstructQuery q = (ConstructQuery)query; RdfSourceWrapper sourcewrapper = new RdfSourceWrapper(source, QueryMeta, this); RdfGraph graph = q.execute(sourcewrapper); WriteGraph(graph, sourcewrapper, sink); }
void WriteGraph(RdfGraph graph, RdfSourceWrapper sourcewrapper, StatementSink sink) { if (sink is RdfWriter) ((RdfWriter)sink).Namespaces.AddFrom(GetQueryPrefixes()); java.util.Iterator iter = graph.iterator(); while (iter.hasNext()) { GraphStatement stmt = (GraphStatement)iter.next(); Statement s; if (stmt is GraphStatementWrapper) { s = ((GraphStatementWrapper)stmt).s; } else { s = new Statement( sourcewrapper.ToEntity(stmt.getSubject()), sourcewrapper.ToEntity(stmt.getPredicate()), sourcewrapper.ToResource(stmt.getObject()), stmt.getGraphName() == null ? Statement.DefaultMeta : sourcewrapper.ToEntity(stmt.getGraphName())); } if (s.AnyNull) continue; // unbound variable, or literal in bad position sink.Add(s); } }