IdentityComparator.java

/*
 * Copyright 2016 The Simple File Server Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.sfs.util;

import org.sfs.vo.Identity;

import java.util.Comparator;

public class IdentityComparator implements Comparator<Identity> {

    @Override
    public int compare(Identity o1, Identity o2) {
        long t1 = -1;
        long t2 = -1;
        if (o1 != null) {
            t1 = o1.getId();
        }
        if (o2 != null) {
            t2 = o2.getId();
        }
        return Long.compare(t1, t2);
    }
}