How to use

org.apache.flink.api.common.operators.base.DeltaIterationBase

constructor

private <D, W> DeltaIterationBase<D, W> translateDeltaIteration(DeltaIterationResultSet<?, ?> untypedIterationEnd) {
  @SuppressWarnings("unchecked")
  DeltaIterationResultSet<D, W> iterationEnd = (DeltaIterationResultSet<D, W>) untypedIterationEnd;
  DeltaIteration<D, W> iterationHead = iterationEnd.getIterationHead();
  String name = iterationHead.getName() == null ? "Unnamed Delta Iteration" : iterationHead.getName();
  DeltaIterationBase<D, W> iterationOperator = new DeltaIterationBase<>(new BinaryOperatorInformation<>(iterationEnd.getType(), iterationEnd.getWorksetType(), iterationEnd.getType()),
      iterationEnd.getKeyPositions(), name);
  iterationOperator.setMaximumNumberOfIterations(iterationEnd.getMaxIterations());
  if (iterationHead.getParallelism() > 0) {
    iterationOperator.setParallelism(iterationHead.getParallelism());
  }
  DeltaIteration.SolutionSetPlaceHolder<D> solutionSetPlaceHolder = iterationHead.getSolutionSet();
  DeltaIteration.WorksetPlaceHolder<W> worksetPlaceHolder = iterationHead.getWorkset();
  translated.put(solutionSetPlaceHolder, iterationOperator.getSolutionSet());
  translated.put(worksetPlaceHolder, iterationOperator.getWorkset());
  Operator<D> translatedSolutionSet = translate(iterationEnd.getNextSolutionSet());
  Operator<W> translatedWorkset = translate(iterationEnd.getNextWorkset());
  iterationOperator.setNextWorkset(translatedWorkset);
  iterationOperator.setSolutionSetDelta(translatedSolutionSet);
  iterationOperator.setInitialSolutionSet(translate(iterationHead.getInitialSolutionSet()));
  iterationOperator.setInitialWorkset(translate(iterationHead.getInitialWorkset()));
  // register all aggregators
  iterationOperator.getAggregators().addAll(iterationHead.getAggregators());
  iterationOperator.setSolutionSetUnManaged(iterationHead.isSolutionSetUnManaged());
  return iterationOperator;
}

private <D, W> DeltaIterationBase<D, W> translateDeltaIteration(DeltaIterationResultSet<?, ?> untypedIterationEnd) {
  @SuppressWarnings("unchecked")
  DeltaIterationResultSet<D, W> iterationEnd = (DeltaIterationResultSet<D, W>) untypedIterationEnd;
  DeltaIteration<D, W> iterationHead = iterationEnd.getIterationHead();
  String name = iterationHead.getName() == null ? "Unnamed Delta Iteration" : iterationHead.getName();
  DeltaIterationBase<D, W> iterationOperator = new DeltaIterationBase<>(new BinaryOperatorInformation<>(iterationEnd.getType(), iterationEnd.getWorksetType(), iterationEnd.getType()),
      iterationEnd.getKeyPositions(), name);
  iterationOperator.setMaximumNumberOfIterations(iterationEnd.getMaxIterations());
  if (iterationHead.getParallelism() > 0) {
    iterationOperator.setParallelism(iterationHead.getParallelism());
  }
  DeltaIteration.SolutionSetPlaceHolder<D> solutionSetPlaceHolder = iterationHead.getSolutionSet();
  DeltaIteration.WorksetPlaceHolder<W> worksetPlaceHolder = iterationHead.getWorkset();
  translated.put(solutionSetPlaceHolder, iterationOperator.getSolutionSet());
  translated.put(worksetPlaceHolder, iterationOperator.getWorkset());
  Operator<D> translatedSolutionSet = translate(iterationEnd.getNextSolutionSet());
  Operator<W> translatedWorkset = translate(iterationEnd.getNextWorkset());
  iterationOperator.setNextWorkset(translatedWorkset);
  iterationOperator.setSolutionSetDelta(translatedSolutionSet);
  iterationOperator.setInitialSolutionSet(translate(iterationHead.getInitialSolutionSet()));
  iterationOperator.setInitialWorkset(translate(iterationHead.getInitialWorkset()));
  // register all aggregators
  iterationOperator.getAggregators().addAll(iterationHead.getAggregators());
  iterationOperator.setSolutionSetUnManaged(iterationHead.isSolutionSetUnManaged());
  return iterationOperator;
}

private <D, W> DeltaIterationBase<D, W> translateDeltaIteration(DeltaIterationResultSet<?, ?> untypedIterationEnd) {
  @SuppressWarnings("unchecked")
  DeltaIterationResultSet<D, W> iterationEnd = (DeltaIterationResultSet<D, W>) untypedIterationEnd;
  DeltaIteration<D, W> iterationHead = iterationEnd.getIterationHead();
  String name = iterationHead.getName() == null ? "Unnamed Delta Iteration" : iterationHead.getName();
  DeltaIterationBase<D, W> iterationOperator = new DeltaIterationBase<>(new BinaryOperatorInformation<>(iterationEnd.getType(), iterationEnd.getWorksetType(), iterationEnd.getType()),
      iterationEnd.getKeyPositions(), name);
  iterationOperator.setMaximumNumberOfIterations(iterationEnd.getMaxIterations());
  if (iterationHead.getParallelism() > 0) {
    iterationOperator.setParallelism(iterationHead.getParallelism());
  }
  DeltaIteration.SolutionSetPlaceHolder<D> solutionSetPlaceHolder = iterationHead.getSolutionSet();
  DeltaIteration.WorksetPlaceHolder<W> worksetPlaceHolder = iterationHead.getWorkset();
  translated.put(solutionSetPlaceHolder, iterationOperator.getSolutionSet());
  translated.put(worksetPlaceHolder, iterationOperator.getWorkset());
  Operator<D> translatedSolutionSet = translate(iterationEnd.getNextSolutionSet());
  Operator<W> translatedWorkset = translate(iterationEnd.getNextWorkset());
  iterationOperator.setNextWorkset(translatedWorkset);
  iterationOperator.setSolutionSetDelta(translatedSolutionSet);
  iterationOperator.setInitialSolutionSet(translate(iterationHead.getInitialSolutionSet()));
  iterationOperator.setInitialWorkset(translate(iterationHead.getInitialWorkset()));
  // register all aggregators
  iterationOperator.getAggregators().addAll(iterationHead.getAggregators());
  iterationOperator.setSolutionSetUnManaged(iterationHead.isSolutionSetUnManaged());
  return iterationOperator;
}