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 = BindLogic(source);
RdfBindingSet results;
try {
results = squery.execute(sourcewrapper);
} catch (name.levering.ryan.sparql.common.QueryException e) {
throw new QueryExecutionException("Error executing query: " + e.Message, e);
}
// Prepare binding objects
java.util.List vars = results.getVariables();
SparqlVariable[] svars = new SparqlVariable[vars.size()];
SemWebVariable[] vars2 = new SemWebVariable[vars.size()];
for (int i = 0; i < svars.Length; i++) {
svars[i] = (SparqlVariable)vars.get(i);
vars2[i] = new SemWebVariable(svars[i].getName());
}
// Initialize the result sink
resultsink.Init(vars2); // 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;
Resource[] bindings = new Resource[vars2.Length];
for (int i = 0; i < bindings.Length; i++) {
Resource r = sourcewrapper.ToResource(row.getValue(svars[i]));
r = sourcewrapper.Persist(r);
bindings[i] = r;
}
resultsink.AddComments(sourcewrapper.GetLog());
resultsink.Add(new VariableBindings(vars2, bindings));
ctr2++;
if (ctr2 >= ReturnLimit && ReturnLimit != -1) break;
}
resultsink.AddComments(sourcewrapper.GetLog());
// Close the result sink.
resultsink.Finished();
}
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 override void Run(SelectableSource targetModel, QueryResultSink result) {
CheckInit();
foreach (Statement s in novariablestatements)
if (!targetModel.Contains(s))
return;
VariableBinding[] finalbindings = new VariableBinding[variables.Length];
for (int i = 0; i < variables.Length; i++)
finalbindings[i].Variable = variableEntities[i];
result.Init(finalbindings, true, false);
Debug("Begnning Query");
BindingSet bindings = new BindingSet(this);
for (int group = 0; group < statements.Length; group++) {
bool ret = Query(group, bindings, targetModel);
if (!ret) {
// A false return value indicates the query
// certainly failed -- a non-optional statement
// failed to match at all.
result.Finished();
return;
}
}
int ctr = -1;
foreach (QueryResult r in bindings.Results) {
Permutation permutation = new Permutation(r.Bindings);
do {
ctr++;
if (ctr < ReturnStart) continue;
for (int i = 0; i < variables.Length; i++)
finalbindings[i].Target = permutation[i];
result.Add(finalbindings);
if (ReturnLimit != -1 && ctr == ReturnStart+ReturnLimit) break;
} while (permutation.Next());
if (ReturnLimit != -1 && ctr == ReturnStart+ReturnLimit) break;
}
result.Finished();
}
public void Query(Statement[] graph, QueryOptions options, QueryResultSink sink) {
if (options.DistinguishedVariables != null && options.DistinguishedVariables.Count == 0)
throw new ArgumentException("options.DistinguishedVariables cannot be an empty list.");
StringBuilder query = new StringBuilder();
query.Append("SELECT ");
// Get a list of variables and map them to fresh names
#if !DOTNET2
Hashtable variableNames = new Hashtable();
#else
Dictionary<Variable,string> variableNames = new Dictionary<Variable,string>();
#endif
Hashtable variableNames2 = new Hashtable();
foreach (Statement s in graph) {
for (int j = 0; j < 3; j++) {
Variable v = s.GetComponent(j) as Variable;
if (v == null) continue;
if (variableNames.ContainsKey(v)) continue;
variableNames2["v" + variableNames.Count] = v;
variableNames[v] = "?v" + variableNames.Count;
}
}
// What variables will we select on?
ArrayList selectedVars = new ArrayList();
foreach (Variable v in
options.DistinguishedVariables != null
? options.DistinguishedVariables
: variableNames.Keys) {
if (!variableNames.ContainsKey(v)) continue; // in case distinguished variables list
// has more than what actually appears in query
if (selectedVars.Contains(v)) continue; // don't select more than once
query.Append(variableNames[v]);
query.Append(' ');
selectedVars.Add(v);
}
if (selectedVars.Count == 0) {
if (options.DistinguishedVariables == null)
throw new ArgumentException("There were no variables in the query.");
else
throw new ArgumentException("None of the variables in the query were distinguished.");
}
// Bnodes are not allowed here -- we can't query on them.
foreach (Statement s in graph) {
for (int j = 0; j < 3; j++) {
if (s.GetComponent(j) is BNode && !(s.GetComponent(j) is Variable)) {
Variable[] varArray = (Variable[])selectedVars.ToArray(typeof(Variable));
sink.Init(varArray);
sink.Finished();
return;
}
}
}
// Build the graph pattern.
query.Append("WHERE {\n");
ResSet firstVarUse = new ResSet();
foreach (Statement s in graph) {
for (int j = 0; j < 3; j++) {
Resource r = s.GetComponent(j);
query.Append(S(r, r is Variable && variableNames.ContainsKey((Variable)r) ? (string)variableNames[(Variable)r] : null));
query.Append(" ");
}
query.Append(" . \n");
if (options.VariableKnownValues != null) {
for (int j = 0; j < 3; j++) {
Resource r = s.GetComponent(j);
if (firstVarUse.Contains(r)) continue;
firstVarUse.Add(r);
if (r is Variable && variableNames.ContainsKey((Variable)r) &&
#if !DOTNET2
options.VariableKnownValues.Contains(r)
#else
options.VariableKnownValues.ContainsKey((Variable)r)
#endif
)
query.Append(SL(options.VariableKnownValues[(Variable)r], (string)variableNames[(Variable)r], true));
}
}
// And what about meta...?
}
query.Append("}");
if (options.Limit > 0) {
query.Append(" LIMIT ");
query.Append(options.Limit);
}
Load(query.ToString(), new QueryResultsWrapper(sink, variableNames2));
}
public override void Run(SelectableSource targetModel, QueryResultSink result)
{
CheckInit();
foreach (Statement s in novariablestatements)
{
if (!targetModel.Contains(s))
{
return;
}
}
VariableBinding[] finalbindings = new VariableBinding[variables.Length];
for (int i = 0; i < variables.Length; i++)
{
finalbindings[i].Variable = variableEntities[i];
}
result.Init(finalbindings, true, false);
Debug("Begnning Query");
BindingSet bindings = new BindingSet(this);
for (int group = 0; group < statements.Length; group++)
{
bool ret = Query(group, bindings, targetModel);
if (!ret)
{
// A false return value indicates the query
// certainly failed -- a non-optional statement
// failed to match at all.
result.Finished();
return;
}
}
int ctr = -1;
foreach (QueryResult r in bindings.Results)
{
Permutation permutation = new Permutation(r.Bindings);
do
{
ctr++;
if (ctr < ReturnStart)
{
continue;
}
for (int i = 0; i < variables.Length; i++)
{
finalbindings[i].Target = permutation[i];
}
result.Add(finalbindings);
if (ReturnLimit != -1 && ctr == ReturnStart + ReturnLimit)
{
break;
}
} while (permutation.Next());
if (ReturnLimit != -1 && ctr == ReturnStart + ReturnLimit)
{
break;
}
}
result.Finished();
}