com.databasesandlife.util.UuidTreeSet Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of java-common Show documentation

Utility classes developed at Adrian Smith Software (A.S.S.)

There is a newer version: 21.0.1

package com.databasesandlife.util;

import java.util.Collection;
import java.util.Comparator;
import java.util.TreeSet;
import java.util.UUID;

/**
 * This is an ordered set of UUIDs.
 * Unfortunately a standard TreeSet of UUIDs is broken, it puts them in the wrong order,
 * see this Java bug which is marked "will not fix".
 *
 * @author This source is copyright Adrian Smith and licensed under the LGPL 3.
 * @see Project on GitHub
 */
public class UuidTreeSet extends TreeSet {

    public static class UuidComparator implements Comparator {
        @Override public int compare(UUID o1, UUID o2) {
            return o1.toString().compareTo(o2.toString());
        }
    }

    public UuidTreeSet() {
        super(new UuidComparator());
    }

    public UuidTreeSet(Collection values) {
        this();
        addAll(values);
    }
}