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);
}
}
