001/*
002 * (C) Copyright 2006-2007 Nuxeo SAS (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     Nuxeo - initial API and implementation
016 */
017package org.nuxeo.ecm.core.uidgen;
018
019import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.DOCUMENT_CREATED;
020
021import org.apache.commons.logging.Log;
022import org.apache.commons.logging.LogFactory;
023import org.nuxeo.ecm.core.api.DocumentModel;
024import org.nuxeo.ecm.core.api.model.PropertyNotFoundException;
025import org.nuxeo.ecm.core.event.Event;
026import org.nuxeo.ecm.core.event.EventContext;
027import org.nuxeo.ecm.core.event.EventListener;
028import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
029import org.nuxeo.runtime.api.Framework;
030
031public class DocUIDGeneratorListener implements EventListener {
032
033    private static final Log log = LogFactory.getLog(DocUIDGeneratorListener.class);
034
035    @Override
036    public void handleEvent(Event event) {
037
038        if (!DOCUMENT_CREATED.equals(event.getName())) {
039            return;
040        }
041        EventContext ctx = event.getContext();
042        if (ctx instanceof DocumentEventContext) {
043            DocumentEventContext docCtx = (DocumentEventContext) ctx;
044            DocumentModel doc = docCtx.getSourceDocument();
045            if (doc.isProxy() || doc.isVersion()) {
046                // a proxy or version keeps the uid of the document
047                // being proxied or versioned => we're not allowed
048                // to modify its field.
049                return;
050            }
051            String eventId = event.getName();
052            log.debug("eventId : " + eventId);
053            try {
054                addUIDtoDoc(doc);
055            } catch (PropertyNotFoundException e) {
056                log.error("Error occurred while generating UID for doc: " + doc, e);
057            }
058        }
059    }
060
061    private static void addUIDtoDoc(DocumentModel doc) throws PropertyNotFoundException {
062        UIDGeneratorService service = Framework.getService(UIDGeneratorService.class);
063        if (service == null) {
064            log.error("<addUIDtoDoc> UIDGeneratorService service not found ... !");
065            return;
066        }
067        // generate UID for our doc
068        service.setUID(doc);
069    }
070
071}