Examples of lupos.datastructures.queryresult.QueryResult.oneTimeIterator()

Package lupos.datastructures.queryresult

Class lupos.datastructures.queryresult.QueryResult

Examples of lupos.datastructures.queryresult.QueryResult.oneTimeIterator()

lupos.datastructures.queryresult.QueryResult.oneTimeIterator()
Because of optimization purposes, you must call this method only once, because the iterator returned from a second call of the method may forget bindings. This is not the case for this QueryResult class, but for some derived classes like IteratorQueryResult, which are used in order not to store unnecessarily intermediate data on disk!

      for (final TriplePattern tp : this.triplePatterns) {


        final QueryResult zQueryResult = queryResult;


        final Iterator<Bindings> itb = new ImmutableIterator<Bindings>() {
          Iterator<Bindings> oldBindings = zQueryResult.oneTimeIterator();
          Bindings currentBindings = null;
          Iterator<Triple> newTriples = null;
          Bindings next = null;


          @Override

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      for (final TriplePattern tp : this.triplePatterns) {


        final QueryResult zQueryResult = queryResult;


        final Iterator<Bindings> itb = new ImmutableIterator<Bindings>() {
          Iterator<Bindings> oldBindings = zQueryResult.oneTimeIterator();
          Bindings currentBindings = null;
          Iterator<Triple> newTriples = null;
          Bindings next = null;


          @Override

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      final List<QueryResult> operandResults, final boolean moreThanOnce) {
    final Iterator<Bindings>[] ita = new Iterator[operandResults.size()];
    final Iterator<QueryResult> itqr = operandResults.iterator();
    for (int i = 0; i < operandResults.size(); i++) {
      final QueryResult qr = itqr.next();
      ita[i] = (moreThanOnce) ? qr.iterator() : qr.oneTimeIterator();
    }
    return ita;
  }


  protected Iterator<Bindings>[] getArray(

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    /*
     * we will not execute this, if using subgraph-submission
     */
    final List<Triple> lst = new LinkedList<Triple>();
    final QueryResult qr = this.sendDirect(key, "SELECT * WHERE {?s ?p ?o}");
    for (final Iterator<Bindings> it = qr.oneTimeIterator(); it.hasNext();) {
      final Bindings bind = it.next();
      final List<Triple> t = bind.getTriples();
      if (t != null) {
        lst.addAll(t);
      }

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    // evaluate query:
    final QueryResult qr = evaluator.getResult(query);


    // use oneTimeIterator() whenever the result need to
    // be iterated only once, otherwise iterator()...
    final Iterator<Bindings> it_query = qr.oneTimeIterator();
    while (it_query.hasNext()) {
      // get next solution of the query...
      final Bindings bindings = it_query.next();
      // print out the bound values of all bindings!
      StringBuilder result=new StringBuilder("{");

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    final Variable p=new Variable("p");
    final Variable o=new Variable("o");


    int tripleNumber=0;


    final Iterator<Bindings> it=queryResult.oneTimeIterator();
    Bindings lastBindings=null;
    while(it.hasNext()){
      final Bindings b=it.next();


      if(triplesInOneFile>0 && tripleNumber>=triplesInOneFile){

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    @Override
    public void run() {
      try {
        while (QueryResultInBlocks.this.queryresultbuffer.hasNext()) {
          final QueryResult queryResult = QueryResultInBlocks.this.queryresultbuffer.get();
          final Iterator<Bindings> ib = queryResult.oneTimeIterator();
          while (ib.hasNext()) {
            final QueryResult queryresult_new = QueryResult
                .createInstance();
            for (int i = 0; i < BLOCKSIZE && ib.hasNext(); i++) {
              queryresult_new.add(ib.next());

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    System.out.println(qr);


    // use oneTimeIterator() whenever the result need to
    // be iterated only once, otherwise iterator()...
    final Iterator<Bindings> it_query = qr.oneTimeIterator();
    while (it_query.hasNext()) {
      // get next solution of the query...
      final Bindings bindings = it_query.next();
      // print out the bound values of all bindings!
      StringBuilder result=new StringBuilder("{");

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