Interface Iteration<E, X extends Exception>

Type Parameters:
E - Object type of objects contained in the iteration.
X - Exception type that is thrown when a problem occurs during iteration.
All Known Subinterfaces:
CloseableIteration<E,X>, GraphQueryResult, QueryResult<T>, TupleQueryResult
All Known Implementing Classes:
AbstractCloseableIteration, AbstractParserQuery.QueryInterruptIteration, AbstractParserQuery.QueryInterruptIteration, BackgroundGraphResult, BackgroundTupleResult, BadlyDesignedLeftJoinIterator, BottomUpJoinIterator, CleanerGraphQueryResult, CleanerIteration, CleanerTupleQueryResult, CloseableIteratorIteration, CloseablePeakableIteration, CollectionIteration, CollectionIteration, CompatibleBindingSetFilter, ConstructTupleFunction.GraphQueryResultIteration, ConvertingIteration, CrossProductIteration, DefaultEvaluationStrategy.ResultSizeCountingIterator, DefaultEvaluationStrategy.TimedIterator, DelayedEvaluationIteration, DelayedIteration, DescribeIteration, DistinctIteration, DistinctModelReducingUnionIteration, DualUnionIteration, EmptyIteration, ExceptionConvertingIteration, ExtensionIterator, FilterIteration, FilterIterator, GraphQueryResultImpl, GroupIterator, HashJoinIteration, InsertBindingSetCursor, IntersectIteration, IteratingGraphQueryResult, IteratingTupleQueryResult, IterationWrapper, IteratorIteration, JoinExecutorBase, JoinExecutorBase, JoinIterator, LeftJoinIterator, LimitedSizeDistinctIteration, LimitIteration, LockingIteration, LoggingCloseableIteration, LookAheadIteration, MemStatementIterator, MemStatementIteratorCache.CachedIteration, MemTripleIterator, MinusIteration, MultiProjectionIterator, MutableTupleQueryResult, OffsetIteration, OnlyNonUnique, OrderIterator, PathIteration, ProjectionIterator, QueryContextIteration, QueryEvaluationStep.DelayedEvaluationIteration, QueryResults.CleanerGraphQueryResult, QueryResults.GraphQueryResultFilter, QueryResults.TupleQueryResultFilter, QueueCursor, QueueIteration, ReducedIteration, RepositoryFederatedService.BatchingServiceIteration, RepositoryFederatedService.CloseConnectionIteration, RepositoryFederatedService.FallbackServiceIteration, RepositoryResult, SailBaseIteration, SailCloseableIteration, SailClosingIteration, SelectTupleFunction.TupleQueryResultIteration, ServiceCrossProductIteration, ServiceJoinConversionIteration, ServiceJoinConversionIteration, ServiceJoinIterator, SilentIteration, SilentIteration, SingleCloseablePlanNode.SingleCloseableIteration, SingletonIteration, SPARQLCrossProductIteration, SPARQLMinusIteration, StatementPatternQueryEvaluationStep.ConvertStatementToBindingSetIterator, StatementPatternQueryEvaluationStep.JoinStatementWithBindingSetIterator, TimeLimitIteration, TripleSourceIterationWrapper, TupleExprWrapperIteration, TupleQueryResultImpl, UnionIteration, Unique.TargetAndValueSortIterator, ZeroLengthPathIteration
@Deprecated(since="4.1.0", forRemoval=true) public interface Iteration<E, X extends Exception>
Deprecated, for removal: This API element is subject to removal in a future version.
For performance and simplification the Iteration interface is deprecated and will be removed in 5.0.0. Use CloseableIteration instead, even if your iteration doesn't require AutoCloseable.
An Iteration is a typed Iterator-like object that can throw (typed) Exceptions while iterating. This is used in cases where the iteration is lazy and evaluates over a (remote) connection, for example accessing a database. In such cases an error can occur at any time and needs to be communicated through a checked exception, something Iterator can not do (it can only throw RuntimeExceptions.
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    hasNext()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Returns true if the iteration has more elements.
    E
    next()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Returns the next element in the iteration.
    void
    remove()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Removes from the underlying collection the last element returned by the iteration (optional operation).
    default Stream<E>
    stream()
    Deprecated, for removal: This API element is subject to removal in a future version.
    Convert the results to a Java 8 Stream.

  • Method Details

    • hasNext

      boolean hasNext() throws X
      Deprecated, for removal: This API element is subject to removal in a future version.
      Returns true if the iteration has more elements. (In other words, returns true if next() would return an element rather than throwing a NoSuchElementException.)
      Returns:
      true if the iteration has more elements.
      Throws:
      X

    • next

      E next() throws X
      Deprecated, for removal: This API element is subject to removal in a future version.
      Returns the next element in the iteration.
      Returns:
      the next element in the iteration.
      Throws:
      NoSuchElementException - if the iteration has no more elements or if it has been closed.
      X

    • remove

      void remove() throws X
      Deprecated, for removal: This API element is subject to removal in a future version.
      Removes from the underlying collection the last element returned by the iteration (optional operation). This method can be called only once per call to next.
      Throws:
      UnsupportedOperationException - if the remove operation is not supported by this Iteration.
      IllegalStateException - If the Iteration has been closed, or if next() has not yet been called, or remove() has already been called after the last call to next().
      X

    • stream

      default Stream<E> stream()
      Deprecated, for removal: This API element is subject to removal in a future version.
      Convert the results to a Java 8 Stream. If this iteration implements CloseableIteration it should be closed (by calling Stream#close() or using try-with-resource) if it is not fully consumed.
      Returns:
      stream