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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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package org.jgroups.util;

import java.util.Comparator;

/**
 * @author Bela Ban
 */
public class SeqnoComparator implements Comparator {
    public int compare(Seqno o1, Seqno o2) {

        // o1 and o2 are either Seqnos or SeqnoRanges, so we just compare on 'low'
        if(!o1.isDummy() && !o2.isDummy())
            return o1.low == o2.low? 0 : o1.low < o2.low ? -1 : 1;

        // o2 must be a seqno or SeqnoRange; o1 must be a Seqno
        if(o1.isDummy()) {
            if(o2 instanceof SeqnoRange)
                return _compare2(o1, (SeqnoRange)o2);
            return _compare(o1, o2);
        }

        // o2 is dummy
        if(o1 instanceof SeqnoRange)
            return _compare3((SeqnoRange)o1, o2);
        return _compare(o1, o2);
    }

    private static int _compare(Seqno o1, Seqno o2) {
        return o1.low == o2.low? 0 : o1.low < o2.low? -1 : 1;
    }

    private static int _compare2(Seqno o1, SeqnoRange o2) {
        return o1.low >= o2.low && o1.low <= o2.high? 0 : o1.low < o2.low? -1 : 1;
    }

    private static int _compare3(SeqnoRange o1, Seqno o2) {
        return o2.low >= o1.low && o2.low <= o1.high? 0 : o1.low < o2.low ? -1 : 1;
    }
}