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

Class EntrySetToMapIteratorAdapter<K,V>

java.lang.Object
org.apache.openjpa.lib.util.collections.EntrySetToMapIteratorAdapter<K,V>
Type Parameters:
K - the type of the keys in the map
V - the type of the values in the map
All Implemented Interfaces:
Iterator<K>, MapIterator<K,V>, ResettableIterator<K>
Direct Known Subclasses:
AbstractSortedMapDecorator.SortedMapIterator
public class EntrySetToMapIteratorAdapter<K,V> extends Object implements MapIterator<K,V>, ResettableIterator<K>
Adapts a Map entrySet to the MapIterator interface.
Since:
4.0

  • Constructor Summary

    Constructors
    Constructor
    Description
    EntrySetToMapIteratorAdapter(Set<Map.Entry<K,V>> entrySet)
    Create a new EntrySetToMapIteratorAdapter.

  • Method Summary

    Modifier and Type
    Method
    Description
    protected Map.Entry<K,V>
    current()
    Get the currently active entry.
    K
    getKey()
    Gets the current key, which is the key returned by the last call to next().
    V
    getValue()
    Gets the current value, which is the value associated with the last key returned by next().
    boolean
    hasNext()
    Checks to see if there are more entries still to be iterated.
    K
    next()
    Gets the next key from the Map.
    void
    remove()
    Removes the last returned key from the underlying Map (optional operation).
    void
    reset()
    Resets the iterator back to the position at which the iterator was created.
    V
    setValue(V value)
    Sets the value associated with the current key (optional operation).

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface java.util.Iterator

    forEachRemaining

  • Constructor Details

    • EntrySetToMapIteratorAdapter

      public EntrySetToMapIteratorAdapter(Set<Map.Entry<K,V>> entrySet)
      Create a new EntrySetToMapIteratorAdapter.
      Parameters:
      entrySet - the entrySet to adapt

  • Method Details

    • getKey

      public K getKey()
      Gets the current key, which is the key returned by the last call to next().
      Specified by:
      getKey in interface MapIterator<K,V>
      Returns:
      the current key

    • getValue

      public V getValue()
      Gets the current value, which is the value associated with the last key returned by next().
      Specified by:
      getValue in interface MapIterator<K,V>
      Returns:
      the current value

    • setValue

      public V setValue(V value)
      Sets the value associated with the current key (optional operation).
      Specified by:
      setValue in interface MapIterator<K,V>
      Parameters:
      value - the new value
      Returns:
      the previous value

    • hasNext

      public boolean hasNext()
      Checks to see if there are more entries still to be iterated.
      Specified by:
      hasNext in interface Iterator<K>
      Specified by:
      hasNext in interface MapIterator<K,V>
      Returns:
      true if the iterator has more elements

    • next

      public K next()
      Gets the next key from the Map.
      Specified by:
      next in interface Iterator<K>
      Specified by:
      next in interface MapIterator<K,V>
      Returns:
      the next key in the iteration

    • reset

      public void reset()
      Resets the iterator back to the position at which the iterator was created.
      Specified by:
      reset in interface ResettableIterator<K>

    • remove

      public void remove()
      Removes the last returned key from the underlying Map (optional operation).

      This method can be called once per call to next().

      Specified by:
      remove in interface Iterator<K>
      Specified by:
      remove in interface MapIterator<K,V>

    • current

      protected Map.Entry<K,V> current()
      Get the currently active entry.
      Returns:
      Map.Entry<K, V>