org.apache.river.concurrent

Class AbstractReferenceComparator<T>

java.lang.Object

org.apache.river.concurrent.AbstractReferenceComparator<T>

All Implemented Interfaces:

Comparator<Referrer<T>>

Direct Known Subclasses:

ReferenceComparator

abstract class AbstractReferenceComparator<T>
extends Object
implements Comparator<Referrer<T>>

Implements equals and hashCode, subclass ReferenceComparator implements Serializable and contains serial data.

Author:

Peter Firmstone.

Constructor Summary

Constructors

Constructor and Description
AbstractReferenceComparator()

Method Summary

Modifier and Type	Method and Description
int	compare(Referrer<T> o1, Referrer<T> o2) This is implemented such that if either Referrer contains a null referent, the comparison is only made using Referrer's, this may have a different natural order, than the comparator provided, however equals will always return 0, this is important to correctly remove a Referrer once its referent has been collected.
boolean	equals(Object o)
(package private) abstract Comparator<? super T>	get()
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

AbstractReferenceComparator

AbstractReferenceComparator()

Method Detail

compare

public int compare(Referrer<T> o1,
                   Referrer<T> o2)

This is implemented such that if either Referrer contains a null referent, the comparison is only made using Referrer's, this may have a different natural order, than the comparator provided, however equals will always return 0, this is important to correctly remove a Referrer once its referent has been collected. The following tests give this a good workout: com/sun/jini/test/impl/joinmanager/ZRegisterStorm.td com/sun/jini/test/spec/renewalmanager/EventTest.td

Specified by:

compare in interface Comparator<Referrer<T>>

Parameters:

o1 -

o2 -

Returns:

equals

public boolean equals(Object o)

Specified by:

equals in interface Comparator<Referrer<T>>

Overrides:

equals in class Object

get

abstract Comparator<? super T> get()

hashCode

public int hashCode()

Overrides:

hashCode in class Object