/protocols/smpp/src/main/java/org/mobicents/protocols/smpp/gsm/HeaderElementComparator.java

 1/*
 2 * JBoss, Home of Professional Open Source
 3 * Copyright 2011, Red Hat, Inc. and individual contributors
 4 * by the @authors tag. See the copyright.txt in the distribution for a
 5 * full listing of individual contributors.
 6 *
 7 * This is free software; you can redistribute it and/or modify it
 8 * under the terms of the GNU Lesser General Public License as
 9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22
23package org.mobicents.protocols.smpp.gsm;
24
25import java.util.Comparator;
26
27/**
28 * Comparator of {@link HeaderElements} that allows elements to be ordered
29 * based on whether they repeat across concatenated messages or not.
30 */
31public class HeaderElementComparator implements Comparator<HeaderElement> {
32
33    public int compare(HeaderElement o1, HeaderElement o2) {
34        if (o1.isRecurring()) {
35            if (o2.isRecurring()) {
36                return 0;
37            } else {
38                return -1;
39            }
40        } else {
41            if (!o2.isRecurring()) {
42                return 0;
43            } else {
44                return 1;
45            }
46        }
47    }
48
49}