Class LookAheadIteration<E>

All Implemented Interfaces:
AutoCloseable, Iterator<E>, CloseableIteration<E>
Direct Known Subclasses:
AsyncIteratorBuffer, AsyncIteratorDirect, AsyncIteratorReadAhead, CrossProductIteration, DescribeIteration, DistinctModelReducingUnionIteration, FedXPathIteration, FedXZeroLengthPathIteration, FilteringIteration, HashJoinIteration, IndependentJoingroupBindingsIteration, IndependentJoingroupBindingsIteration2, IndependentJoingroupBindingsIteration3, JoinExecutorBase, JoinIterator, LeftJoinIterator, MemTripleIterator, MultiProjectionIterator, ParallelExecutorBase, ParallelServiceExecutor, PathIteration, QueueIteration, SortedIteration, SPARQLCrossProductIteration, UnionIteration, ZeroLengthPathIteration

public abstract class LookAheadIteration<E> extends AbstractCloseableIteration<E>
An Iteration that looks one element ahead, if necessary, to handle calls to hasNext(). This is a convenient super class for Iterations that have no easy way to tell if there are any more results, but still should implement the java.util.Iteration interface.
  • Constructor Details

    • LookAheadIteration

      protected LookAheadIteration()
  • Method Details

    • getNextElement

      protected abstract E getNextElement()
      Gets the next element. Subclasses should implement this method so that it returns the next element.
      The next element, or null if no more elements are available.
    • hasNext

      public final boolean hasNext()
    • next

      public final E next()
    • remove

      public void remove()