本文整理了Java中org.eclipse.rdf4j.query.algebra.evaluation.iterator.ZeroLengthPathIteration类的一些代码示例，展示了ZeroLengthPathIteration类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ZeroLengthPathIteration类的具体详情如下：
包路径：org.eclipse.rdf4j.query.algebra.evaluation.iterator.ZeroLengthPathIteration
类名称：ZeroLengthPathIteration

ZeroLengthPathIteration介绍

暂无

代码示例

代码示例来源：origin: de.tudarmstadt.ukp.inception.rdf4j/rdf4j-queryalgebra-evaluation

protected ZeroLengthPathIteration getZeroLengthPathIterator(final BindingSet bindings,
    final Var subjectVar, final Var objVar, final Var contextVar, Value subj, Value obj)
{
  return new ZeroLengthPathIteration(this, subjectVar, objVar, subj, obj, contextVar, bindings);
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation

reportedValues = makeSet();
bs2.addBinding(ANON_SEQUENCE_VAR, ValueFactoryImpl.getInstance().createLiteral("object"));
List<BindingSet> seqList = Arrays.<BindingSet> asList(bs1, bs2);
iter = new CrossProductIteration(createIteration(), seqList);
Value v = bs.getValue(endpointVarName);
if (add(reportedValues, v)) {
  QueryBindingSet next = new QueryBindingSet(bindings);
  next.addBinding(subjectVar.getName(), v);

代码示例来源：origin: de.tudarmstadt.ukp.inception.rdf4j/rdf4j-queryalgebra-evaluation

private CloseableIteration<BindingSet, QueryEvaluationException> createIteration()
  throws QueryEvaluationException
{
  Var startVar = createAnonVar(ANON_SUBJECT_VAR);
  Var predicate = createAnonVar(ANON_PREDICATE_VAR);
  Var endVar = createAnonVar(ANON_OBJECT_VAR);
  StatementPattern subjects = new StatementPattern(startVar, predicate, endVar);
  if (contextVar != null) {
    subjects.setScope(Scope.NAMED_CONTEXTS);
    subjects.setContextVar(contextVar);
  }
  CloseableIteration<BindingSet, QueryEvaluationException> iter = evaluationStrategy.evaluate(subjects,
      bindings);
  return iter;
}

代码示例来源：origin: de.tudarmstadt.ukp.inception.rdf4j/rdf4j-queryalgebra-evaluation

reportedValues = makeSet();
bs2.addBinding(ANON_SEQUENCE_VAR, ValueFactoryImpl.getInstance().createLiteral("object"));
List<BindingSet> seqList = Arrays.<BindingSet> asList(bs1, bs2);
iter = new CrossProductIteration(createIteration(), seqList);
Value v = bs.getValue(endpointVarName);
if (add(reportedValues, v)) {
  QueryBindingSet next = new QueryBindingSet(bindings);
  next.addBinding(subjectVar.getName(), v);

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation

private CloseableIteration<BindingSet, QueryEvaluationException> createIteration()
  throws QueryEvaluationException
{
  Var startVar = createAnonVar(ANON_SUBJECT_VAR);
  Var predicate = createAnonVar(ANON_PREDICATE_VAR);
  Var endVar = createAnonVar(ANON_OBJECT_VAR);
  StatementPattern subjects = new StatementPattern(startVar, predicate, endVar);
  if (contextVar != null) {
    subjects.setScope(Scope.NAMED_CONTEXTS);
    subjects.setContextVar(contextVar);
  }
  CloseableIteration<BindingSet, QueryEvaluationException> iter = evaluationStrategy.evaluate(subjects,
      bindings);
  return iter;
}

代码示例来源：origin: org.eclipse.rdf4j/rdf4j-queryalgebra-evaluation

protected ZeroLengthPathIteration getZeroLengthPathIterator(final BindingSet bindings,
    final Var subjectVar, final Var objVar, final Var contextVar, Value subj, Value obj)
{
  return new ZeroLengthPathIteration(this, subjectVar, objVar, subj, obj, contextVar, bindings);
}

代码示例来源：origin: Merck/Halyard

/**
 * Evaluate {@link ZeroLengthPath} query model nodes
 * @param parent
 * @param zlp
 * @param bindings
 */
private void evaluateZeroLengthPath(BindingSetPipe parent, ZeroLengthPath zlp, BindingSet bindings) {
  final Var subjectVar = zlp.getSubjectVar();
  final Var objVar = zlp.getObjectVar();
  final Var contextVar = zlp.getContextVar();
  Value subj = subjectVar.getValue() == null ? bindings.getValue(subjectVar.getName()) : subjectVar.getValue();
  Value obj = objVar.getValue() == null ? bindings.getValue(objVar.getName()) : objVar.getValue();
  if (subj != null && obj != null) {
    if (!subj.equals(obj)) {
      try {
        parent.push(null);
      } catch (InterruptedException e) {
        parent.handleException(e);
      }
      return;
    }
  }
  //temporary solution using copy of the original iterator
  //re-writing this to push model is a bit more complex task
  HalyardStatementPatternEvaluation.enqueue(parent, new ZeroLengthPathIteration(parentStrategy, subjectVar, objVar, subj, obj, contextVar, bindings), zlp);
}