org.compass.core.util.backport.java.util.concurrent
Class ConcurrentHashMap.WriteThroughEntry

java.lang.Object
  org.compass.core.util.backport.java.util.AbstractMap.SimpleEntry
      org.compass.core.util.backport.java.util.concurrent.ConcurrentHashMap.WriteThroughEntry

All Implemented Interfaces:

Map.Entry

Enclosing class:

ConcurrentHashMap

final class ConcurrentHashMap.WriteThroughEntry
extends AbstractMap.SimpleEntry

Custom Entry class used by EntryIterator.next(), that relays setValue changes to the underlying map.

Constructor Summary

ConcurrentHashMap.WriteThroughEntry(Object k, Object v)

Method Summary

Object

setValue(Object value) Set our entry's value and write through to the map.

Methods inherited from class org.compass.core.util.backport.java.util.AbstractMap.SimpleEntry

equals, getKey, getValue, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ConcurrentHashMap.WriteThroughEntry

ConcurrentHashMap.WriteThroughEntry(Object k,
                                    Object v)

Method Detail

setValue

public Object setValue(Object value)

Set our entry's value and write through to the map. The value to return is somewhat arbitrary here. Since a WriteThroughEntry does not necessarily track asynchronous changes, the most recent "previous" value could be different from what we return (or could even have been removed in which case the put will re-establish). We do not and cannot guarantee more.

Specified by:

setValue in interface Map.Entry

Overrides:

setValue in class AbstractMap.SimpleEntry

Parameters:

value - new value to be stored in this entry

Returns:

the old value corresponding to the entry