org.jgroups.util.SeqnoComparator Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all

This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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).

There is a newer version: 33.0.2.Final

Show newest version

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;
    }
}