1 /*
2 * Licensed to The Apereo Foundation under one or more contributor license
3 * agreements. See the NOTICE file distributed with this work for additional
4 * information regarding copyright ownership.
5 *
6 *
7 * The Apereo Foundation licenses this file to you under the Educational
8 * Community License, Version 2.0 (the "License"); you may not use this file
9 * except in compliance with the License. You may obtain a copy of the License
10 * at:
11 *
12 * http://opensource.org/licenses/ecl2.txt
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
16 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
17 * License for the specific language governing permissions and limitations under
18 * the License.
19 *
20 */
21 package org.opencastproject.assetmanager.api;
22
23 import java.io.Serializable;
24
25 /**
26 * The version of an archived media package or element.
27 * Versions have a natural order where v1 < v2 means that v1 is older that v2.
28 */
29 public interface Version extends Comparable<Version>, Serializable {
30 /** Check if this version is older than <code>v</code>. */
31 boolean isOlder(Version v);
32
33 /** Check if this version is younger than <code>v</code>. */
34 boolean isYounger(Version v);
35
36 /** A version must implement hashCode and equals. */
37 boolean equals(Object that);
38
39 /** A version must implement hashCode and equals. */
40 int hashCode();
41
42 /**
43 * Serialize to a string. This is the inverse function of
44 * {@link org.opencastproject.assetmanager.api.AssetManager#toVersion(String)}.
45 */
46 String toString();
47 }