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 org.openrdf.model.Value evaluate(org.openrdf.model.Value[] args)
{
try {
Resource ret = func.Evaluate(source.ToResources(args));
return(RdfSourceWrapper.Wrap(ret));
} catch (Exception e) {
throw new name.levering.ryan.sparql.logic.function.ExternalFunctionException(e);
}
}
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);
}
Resource ToRes(object expr, java.util.Map knownValues, bool entities, Hashtable varMap1, Hashtable varMap2, RdfSourceWrapper src, QueryOptions opts, VariableList distinguishedVars, VariableList undistinguishedVars, java.util.Set sparqlDistinguished)
{
if (expr is SparqlVariable) {
Variable v;
if (varMap1.ContainsKey(expr)) {
v = (Variable)varMap1[expr];
} else {
v = new Variable(expr.ToString());
varMap1[expr] = v;
varMap2[v] = expr;
if (knownValues != null && knownValues.get(expr) != null) {
java.util.Set values = (java.util.Set)knownValues.get(expr);
VarKnownValuesList values2 = new VarKnownValuesList();
for (java.util.Iterator iter = values.iterator(); iter.hasNext(); ) {
Resource r = src.ToResource((name.levering.ryan.sparql.common.Value)iter.next());
if (r != null)
values2.Add(r);
}
opts.VariableKnownValues[v] = values2;
}
if (sparqlDistinguished != null && sparqlDistinguished.contains(expr))
distinguishedVars.Add(v);
else
undistinguishedVars.Add(v);
}
return v;
}
return entities ? src.ToEntity((name.levering.ryan.sparql.common.Value)expr) : src.ToResource((name.levering.ryan.sparql.common.Value)expr);
}
public ExtFuncWrapper(RdfSourceWrapper s, RdfFunction f)
{
source = s;
func = f;
}
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);
}
}
/* INTERNAL METHODS TO CONTROL QUERY EXECUTION */
private RdfSourceWrapper BindLogic(SelectableSource source)
{
RdfSourceWrapper sourcewrapper = new RdfSourceWrapper(source, this);
MyLogicFactory logic = new MyLogicFactory();
foreach (RdfFunction f in extFunctions)
logic.registerExternalFunction(
new URIWrapper(f.Uri),
new ExtFuncWrapper(sourcewrapper, f));
query.prepare(sourcewrapper, logic);
return sourcewrapper;
}
public StatementIterator(SelectableSource source, SelectFilter filter, RdfSourceWrapper wrapper)
{
this.source = source;
this.filter = filter;
this.wrapper = wrapper;
this.wantMetas = true;
}
public override void Run(SelectableSource source, QueryResultSink resultsink) {
if (!(query is SelectQuery))
throw new InvalidOperationException("Only SELECT queries are supported by this method (" + query.GetType() + ").");
// Perform the query
SelectQuery squery = (SelectQuery)query;
RdfSourceWrapper sourcewrapper = new RdfSourceWrapper(source, QueryMeta, this);
MyLogicFactory logic = new MyLogicFactory();
foreach (RdfFunction f in extFunctions)
logic.registerExternalFunction(
new URIWrapper(f.Uri),
new ExtFuncWrapper(sourcewrapper, f));
squery.bindLogic(logic);
RdfBindingSet results;
try {
results = squery.execute(sourcewrapper);
} catch (java.lang.Exception e) {
throw new QueryExecutionException("Error executing query: " + e.Message, e);
}
// Prepare binding objects
java.util.List vars = results.getVariables();
VariableBinding[] bindings = new VariableBinding[vars.size()];
SparqlVariable[] svars = new SparqlVariable[vars.size()];
SemWebVariable[] vars2 = new SemWebVariable[vars.size()];
for (int i = 0; i < bindings.Length; i++) {
svars[i] = (SparqlVariable)vars.get(i);
vars2[i] = new SemWebVariable(svars[i].getName());
bindings[i] = new VariableBinding(vars2[i], null);
}
// Initialize the result sink
resultsink.Init(bindings, false, false); // set distinct and ordered
// Set the comments
resultsink.AddComments(queryString + "\n");
resultsink.AddComments(sourcewrapper.GetLog());
// Iterate the bindings
java.util.Iterator iter = results.iterator();
long ctr = -1, ctr2 = 0;
while (iter.hasNext()) {
RdfBindingRow row = (RdfBindingRow)iter.next();
// Since SPARQL processing may be lazy-delayed,
// add any new comments that might have been logged.
resultsink.AddComments(sourcewrapper.GetLog());
ctr++;
if (ctr < ReturnStart && ReturnStart != -1) continue;
for (int i = 0; i < bindings.Length; i++) {
Resource r = sourcewrapper.ToResource(row.getValue(svars[i]));
r = sourcewrapper.Persist(r);
bindings[i] = new VariableBinding(bindings[i].Variable, r);
}
resultsink.AddComments(sourcewrapper.GetLog());
resultsink.Add(bindings);
ctr2++;
if (ctr2 >= ReturnLimit && ReturnLimit != -1) break;
}
resultsink.AddComments(sourcewrapper.GetLog());
// Close the result sink.
resultsink.Finished();
}
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);
}
public ExtFuncWrapper(RdfSourceWrapper s, RdfFunction f)
{
source = s;
func = f;
}
public org.openrdf.model.Value getObject()
{
return(RdfSourceWrapper.Wrap(s.Object));
}
public override void Run(SelectableSource source, QueryResultSink resultsink)
{
if (!(query is SelectQuery))
{
throw new InvalidOperationException("Only SELECT queries are supported by this method (" + query.GetType() + ").");
}
// Perform the query
SelectQuery squery = (SelectQuery)query;
RdfSourceWrapper sourcewrapper = new RdfSourceWrapper(source, QueryMeta, this);
MyLogicFactory logic = new MyLogicFactory();
foreach (RdfFunction f in extFunctions)
{
logic.registerExternalFunction(
new URIWrapper(f.Uri),
new ExtFuncWrapper(sourcewrapper, f));
}
squery.bindLogic(logic);
RdfBindingSet results;
try {
results = squery.execute(sourcewrapper);
} catch (java.lang.Exception e) {
throw new QueryExecutionException("Error executing query: " + e.Message, e);
}
// Prepare binding objects
java.util.List vars = results.getVariables();
VariableBinding[] bindings = new VariableBinding[vars.size()];
SparqlVariable[] svars = new SparqlVariable[vars.size()];
SemWebVariable[] vars2 = new SemWebVariable[vars.size()];
for (int i = 0; i < bindings.Length; i++)
{
svars[i] = (SparqlVariable)vars.get(i);
vars2[i] = new SemWebVariable(svars[i].getName());
bindings[i] = new VariableBinding(vars2[i], null);
}
// Initialize the result sink
resultsink.Init(bindings, false, false); // set distinct and ordered
// Set the comments
resultsink.AddComments(queryString + "\n");
resultsink.AddComments(sourcewrapper.GetLog());
// Iterate the bindings
java.util.Iterator iter = results.iterator();
long ctr = -1, ctr2 = 0;
while (iter.hasNext())
{
RdfBindingRow row = (RdfBindingRow)iter.next();
// Since SPARQL processing may be lazy-delayed,
// add any new comments that might have been logged.
resultsink.AddComments(sourcewrapper.GetLog());
ctr++;
if (ctr < ReturnStart && ReturnStart != -1)
{
continue;
}
for (int i = 0; i < bindings.Length; i++)
{
Resource r = sourcewrapper.ToResource(row.getValue(svars[i]));
r = sourcewrapper.Persist(r);
bindings[i] = new VariableBinding(bindings[i].Variable, r);
}
resultsink.AddComments(sourcewrapper.GetLog());
resultsink.Add(bindings);
ctr2++;
if (ctr2 >= ReturnLimit && ReturnLimit != -1)
{
break;
}
}
resultsink.AddComments(sourcewrapper.GetLog());
// Close the result sink.
resultsink.Finished();
}
