org.eclipse.rdf4j.query.algebra.evaluation.iterator

## Class ZeroLengthPathIteration

- java.lang.Object
- - org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
  - - org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>
    - - org.eclipse.rdf4j.query.algebra.evaluation.iterator.ZeroLengthPathIteration

- All Implemented Interfaces:
    AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>
  Direct Known Subclasses:
    LimitedSizeZeroLengthPathIteration

      public class ZeroLengthPathIteration
      extends LookAheadIteration<BindingSet,QueryEvaluationException>

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl, Var subjectVar, Var objVar, Value subj, Value obj, Var contextVar, BindingSet bindings)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected boolean` | `add(Set<Value> reportedValues2, Value v)` add param v to the set reportedValues2
    `Var` | `createAnonVar(String varName)`
    `protected BindingSet` | `getNextElement()` Gets the next element.

    - ### Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration

      `handleClose, hasNext, next, remove`

    - ### Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

      `close, isClosed`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface org.eclipse.rdf4j.common.iteration.Iteration

      `stream`

- - ### Constructor Detail

    - #### ZeroLengthPathIteration

          public ZeroLengthPathIteration(EvaluationStrategy evaluationStrategyImpl,
                                         Var subjectVar,
                                         Var objVar,
                                         Value subj,
                                         Value obj,
                                         Var contextVar,
                                         BindingSet bindings)

  - ### Method Detail

    - #### getNextElement

          protected BindingSet getNextElement()
                                       throws QueryEvaluationException

      Description copied from class: `LookAheadIteration`
      Gets the next element. Subclasses should implement this method so that it returns the next element.
      Specified by:
        `getNextElement` in class `LookAheadIteration<BindingSet,QueryEvaluationException>`
      Returns:
        The next element, or `null` if no more elements are available.
      Throws:
        `QueryEvaluationException`

    - #### add

          protected boolean add(Set<Value> reportedValues2,
                                Value v)
                         throws QueryEvaluationException

      add param v to the set reportedValues2
      Parameters:
        `reportedValues2` -
        `v` -
      Returns:
        true if v added to set and not yet present
      Throws:
        `QueryEvaluationException`

    - #### createAnonVar

          public Var createAnonVar(String varName)

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