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## com.tangosol.net.cache
Class SimpleOverflowMap.KeyIterator

    java.lang.Object
      com.tangosol.net.cache.SimpleOverflowMap.KeyIterator

All Implemented Interfaces:
  java.util.Iterator

Enclosing class:
  SimpleOverflowMap

    protected class SimpleOverflowMap.KeyIterator

extends java.lang.Object
implements java.util.Iterator

An Iterator implementation that attempts to provide the most resilient and most up-to-date view of the keys in the OverflowMap. This means that it will avoid throwing a ConcurrentModificationException, and that it will attempt to directly use the underlying iterators available for the front and back maps.

Constructor Summary
`SimpleOverflowMap.KeyIterator()` Default constructor.

Method Summary
`protected boolean` | `advance()` Advance to the next key.
`boolean` | `hasNext()` Returns `true` if the iteration has more elements.
`java.lang.Object` | `next()` Returns the next element in the iteration.
`void` | `remove()` Removes from the underlying collection the last element returned by the iterator.
`protected void` | `useBackIterator()` Switch to an iterator over the back map.
`protected void` | `useDoneIterator()` Switch to an iterator over nothing.
`protected void` | `useFrontIterator()` Switch to a snapshot iterator.
`protected void` | `useSnapshotIterator()` Switch to a snapshot iterator.

Constructor Detail

### SimpleOverflowMap.KeyIterator

    public SimpleOverflowMap.KeyIterator()

  Default constructor.

Method Detail

### hasNext

    public boolean hasNext()

  Returns `true` if the iteration has more elements. (In other words, returns `true` if `next` would return an element rather than throwing an exception.)

  Specified by:
    `hasNext` in interface `java.util.Iterator`
  Returns:
    `true` if the iterator has more elements

### next

    public java.lang.Object next()

  Returns the next element in the iteration.

  Specified by:
    `next` in interface `java.util.Iterator`
  Returns:
    the next element in the iteration
  Throws:
    `java.util.NoSuchElementException` - if the Iterator has no more elements

### remove

    public void remove()

  Removes from the underlying collection the last element returned by the iterator.

  Specified by:
    `remove` in interface `java.util.Iterator`
  Throws:
    `java.lang.IllegalStateException` - if the `next` method has not yet been called, or the `remove` method has already been called after the last call to the `next` method

### advance

    protected boolean advance()

  Advance to the next key.

  Returns:
    true if there is a next key

### useFrontIterator

    protected void useFrontIterator()

  Switch to a snapshot iterator.

### useBackIterator

    protected void useBackIterator()

  Switch to an iterator over the back map.

### useSnapshotIterator

    protected void useSnapshotIterator()

  Switch to a snapshot iterator.

### useDoneIterator

    protected void useDoneIterator()

  Switch to an iterator over nothing.

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Oracle® Coherence Java API Reference
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