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:

java.util.Iterator<K>, MapIterator<K,V>, ResettableIterator<K>

Direct Known Subclasses:

AbstractSortedMapDecorator.SortedMapIterator

public class EntrySetToMapIteratorAdapter<K,V>
extends java.lang.Object
implements MapIterator<K,V>, ResettableIterator<K>

Adapts a Map entrySet to the MapIterator interface.

Since:

4.0

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected java.util.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 Detail

EntrySetToMapIteratorAdapter

public EntrySetToMapIteratorAdapter(java.util.Set<java.util.Map.Entry<K,V>> entrySet)

Create a new EntrySetToMapIteratorAdapter.

Parameters:

entrySet - the entrySet to adapt

Method Detail

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 java.util.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 java.util.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 java.util.Iterator<K>

Specified by:

remove in interface MapIterator<K,V>

current

protected java.util.Map.Entry<K,V> current()

Get the currently active entry.

Returns:

Map.Entry<K, V>