1 /*
2 * This file is part of *** M y C o R e ***
3 * See http://www.mycore.de/ for details.
4 *
5 * MyCoRe is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * MyCoRe is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MyCoRe. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 package org.mycore.datamodel.metadata.share;
20
21 import org.mycore.access.MCRAccessException;
22 import org.mycore.common.MCRPersistenceException;
23 import org.mycore.datamodel.metadata.MCRObject;
24
25 /**
26 * @author Thomas Scheffler (yagee)
27 * @see MCRMetadataShareAgentFactory
28 */
29 public interface MCRMetadataShareAgent {
30
31 /**
32 * Determines if shareable metadata changed from <code>oldVersion</code> to <code>newVersion</code>
33 * @param oldVersion previous version of MCRObject
34 * @param newVersion new version of MCRObject
35 */
36 boolean shareableMetadataChanged(MCRObject oldVersion, MCRObject newVersion);
37
38 /**
39 * updates all recipients of shareable metadata from <code>holder</code>.
40 * @param holder usually the parent object that can distrivute metadata
41 * @throws MCRAccessException
42 * @throws MCRPersistenceException
43 */
44 void distributeMetadata(MCRObject holder) throws MCRPersistenceException, MCRAccessException;
45
46 /**
47 * Include shareable metadata from <code>holder</code> before persisting <code>recipient</code>.
48 * @param recipient on update/create before handling events.
49 */
50 void receiveMetadata(MCRObject recipient);
51 }