001/*
002 * (C) Copyright 2006-2007 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Nuxeo - initial API and implementation
018 */
019package org.nuxeo.ecm.core.uidgen;
020
021import static org.nuxeo.ecm.core.api.event.DocumentEventTypes.DOCUMENT_CREATED;
022
023import org.apache.commons.logging.Log;
024import org.apache.commons.logging.LogFactory;
025import org.nuxeo.ecm.core.api.DocumentModel;
026import org.nuxeo.ecm.core.api.model.PropertyNotFoundException;
027import org.nuxeo.ecm.core.event.Event;
028import org.nuxeo.ecm.core.event.EventContext;
029import org.nuxeo.ecm.core.event.EventListener;
030import org.nuxeo.ecm.core.event.impl.DocumentEventContext;
031import org.nuxeo.runtime.api.Framework;
032
033public class DocUIDGeneratorListener implements EventListener {
034
035    private static final Log log = LogFactory.getLog(DocUIDGeneratorListener.class);
036
037    @Override
038    public void handleEvent(Event event) {
039
040        if (!DOCUMENT_CREATED.equals(event.getName())) {
041            return;
042        }
043        EventContext ctx = event.getContext();
044        if (ctx instanceof DocumentEventContext) {
045            DocumentEventContext docCtx = (DocumentEventContext) ctx;
046            DocumentModel doc = docCtx.getSourceDocument();
047            if (doc.isProxy() || doc.isVersion()) {
048                // a proxy or version keeps the uid of the document
049                // being proxied or versioned => we're not allowed
050                // to modify its field.
051                return;
052            }
053            String eventId = event.getName();
054            log.debug("eventId : " + eventId);
055            try {
056                addUIDtoDoc(doc);
057            } catch (PropertyNotFoundException e) {
058                log.error("Error occurred while generating UID for doc: " + doc, e);
059            }
060        }
061    }
062
063    private static void addUIDtoDoc(DocumentModel doc) throws PropertyNotFoundException {
064        UIDGeneratorService service = Framework.getService(UIDGeneratorService.class);
065        if (service == null) {
066            log.error("<addUIDtoDoc> UIDGeneratorService service not found ... !");
067            return;
068        }
069        // generate UID for our doc
070        service.setUID(doc);
071    }
072
073}