com.atlassian.jira.issue.comparator
Class NullComparator

java.lang.Object
  com.atlassian.jira.issue.comparator.NullComparator

All Implemented Interfaces:

Comparator

public class NullComparator
extends Object
implements Comparator

This comparator compares two given objects and is null safe.

Constructor Summary

NullComparator()

Method Summary

int	compare(Object o1, Object o2) Compares two given objects.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

NullComparator

public NullComparator()

Method Detail

compare

public int compare(Object o1,
                   Object o2)
            throws ClassCastException

Compares two given objects. Returns 0 if both objects are null, 1 if o2 is null, -1 if o1 is null. In case when both objects are not null, returns the result of o1.compareTo(o2) as long as o1 implements Comparable, otherwise returns 0.
Note that if o1 is an instance of Comparable and o2 is not of the same type may result in ClassCastException.

Specified by:

compare in interface Comparator

Parameters:

o1 - object to compare

o2 - object to compare

Returns:

result of comparison

Throws:

ClassCastException - if o1 is an instance of Comparable and o2 is not of the same type