net.ontopia.topicmaps.nav.utils.comparators
Class TopicComparator

java.lang.Object
  net.ontopia.topicmaps.nav.utils.comparators.TopicComparator

All Implemented Interfaces:

java.util.Comparator

Direct Known Subclasses:

OccTypeComparator

public class TopicComparator
extends java.lang.Object
implements java.util.Comparator

INTERNAL: A Comparator for ordering topics alphabetically. Note that it does not look up the 'sort' topic for you, but that this must be provided explicitly to the constructors.

Field Summary

protected GrabberIF	nameGrabber
protected StringifierIF	nameStringifier

Constructor Summary

TopicComparator()
Empty constructor, used on application startup to initialise a "fast" comparator which will compare Topics using no context.

TopicComparator(java.util.Collection baseNameContext)
Constructor used to make a comparator which will compare Topics using the contexts provided.

TopicComparator(java.util.Collection baseNameContext, java.util.Collection variantNameContext)
Constructor used to make a comparator which will compare Topics using the contexts provided.

Method Summary

int	compare(java.lang.Object o1, java.lang.Object o2) implementing method which is required for Comparator interface.

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

nameGrabber

protected GrabberIF nameGrabber

nameStringifier

protected StringifierIF nameStringifier

Constructor Detail

TopicComparator

public TopicComparator()

Empty constructor, used on application startup to initialise a "fast" comparator which will compare Topics using no context.

TopicComparator

public TopicComparator(java.util.Collection baseNameContext)

Constructor used to make a comparator which will compare Topics using the contexts provided.

TopicComparator

public TopicComparator(java.util.Collection baseNameContext,
                       java.util.Collection variantNameContext)

Constructor used to make a comparator which will compare Topics using the contexts provided. The variantNameContext will generally be a Sort topic if is available. This is the default applied by the application.

Method Detail

compare

public int compare(java.lang.Object o1,
                   java.lang.Object o2)

implementing method which is required for Comparator interface.

Specified by:

compare in interface java.util.Comparator