Package org.apache.openjpa.lib.util.collections

Class EmptyIterator<E>

java.lang.Object
org.apache.openjpa.lib.util.collections.EmptyIterator<E>
All Implemented Interfaces:
Iterator<E>, ResettableIterator<E>
public class EmptyIterator<E> extends Object implements ResettableIterator<E>
Provides an implementation of an empty iterator.

This class provides an implementation of an empty iterator. This class provides for binary compatibility between Commons Collections 2.1.1 and 3.1 due to issues with IteratorUtils.

Since:
2.1.1 and 3.1

  • Field Details

    • RESETTABLE_INSTANCE

      public static final ResettableIterator RESETTABLE_INSTANCE
      Singleton instance of the iterator.
      Since:
      3.1

    • INSTANCE

      public static final Iterator INSTANCE
      Singleton instance of the iterator.
      Since:
      2.1.1 and 3.1

  • Constructor Details

    • EmptyIterator

      protected EmptyIterator()
      Constructor.

  • Method Details

    • resettableEmptyIterator

      public static <E> ResettableIterator<E> resettableEmptyIterator()
      Get a typed resettable empty iterator instance.
      Type Parameters:
      E - the element type
      Returns:
      ResettableIterator<E>

    • emptyIterator

      public static <E> Iterator<E> emptyIterator()
      Get a typed empty iterator instance.
      Type Parameters:
      E - the element type
      Returns:
      Iterator<E>

    • hasNext

      public boolean hasNext()

    • next

      public E next()

    • hasPrevious

      public boolean hasPrevious()

    • previous

      public E previous()

    • nextIndex

      public int nextIndex()

    • previousIndex

      public int previousIndex()

    • add

      public void add(E obj)

    • set

      public void set(E obj)

    • remove

      public void remove()

    • reset

      public void reset()