de.topicmapslab.majortom.comparator
Class RoleComparator

java.lang.Object
  de.topicmapslab.majortom.comparator.RoleComparator

All Implemented Interfaces:

java.util.Comparator<org.tmapi.core.Role>

public class RoleComparator
extends java.lang.Object
implements java.util.Comparator<org.tmapi.core.Role>

association role comparator

Author:

Sven Krosse

Field Summary

private boolean	ascending
private static RoleComparator	instanceAsc
private static RoleComparator	instanceDesc

Constructor Summary

private

RoleComparator(boolean ascending) constructor

Method Summary

int	compare(org.tmapi.core.Role o1, org.tmapi.core.Role o2) Compare two association items.
static RoleComparator	getInstance(boolean ascending) Returns the singleton instance of the comparator

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

Field Detail

instanceAsc

private static RoleComparator instanceAsc

instanceDesc

private static RoleComparator instanceDesc

ascending

private final boolean ascending

Constructor Detail

RoleComparator

private RoleComparator(boolean ascending)

constructor

Parameters:

ascending - sorting order ascending?

Method Detail

getInstance

public static RoleComparator getInstance(boolean ascending)

Returns the singleton instance of the comparator

Parameters:

ascending - sorting order ascending?

Returns:

the instance the comparator instance

compare

public int compare(org.tmapi.core.Role o1,
                   org.tmapi.core.Role o2)

Compare two association items.

Return 0 if both associations roles have the same type and player (lexicographical comparison of identities).

Return -1 if the type or player of the first role is higher (lexicographical comparison of identities).

Return 1 if the type or player of the second role is higher (lexicographical comparison of identities).

Specified by:

compare in interface java.util.Comparator<org.tmapi.core.Role>