001/* 002 * (C) Copyright 2012 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 * Thierry Delprat 018 */ 019package org.nuxeo.template.listeners; 020 021import org.nuxeo.ecm.core.api.DocumentModel; 022import org.nuxeo.ecm.core.api.event.DocumentEventTypes; 023import org.nuxeo.ecm.core.event.Event; 024import org.nuxeo.ecm.core.event.EventContext; 025import org.nuxeo.ecm.core.event.EventListener; 026import org.nuxeo.ecm.core.event.EventProducer; 027import org.nuxeo.ecm.core.event.impl.DocumentEventContext; 028import org.nuxeo.runtime.api.Framework; 029import org.nuxeo.runtime.transaction.TransactionHelper; 030import org.nuxeo.template.api.adapters.TemplateSourceDocument; 031 032public class TemplateDeletionGuard implements EventListener { 033 034 @Override 035 public void handleEvent(Event event) { 036 037 EventContext ctx = event.getContext(); 038 039 if (DocumentEventTypes.ABOUT_TO_REMOVE.equals(event.getName())) { 040 if (ctx instanceof DocumentEventContext) { 041 DocumentEventContext docCtx = (DocumentEventContext) ctx; 042 DocumentModel targetDoc = docCtx.getSourceDocument(); 043 044 TemplateSourceDocument templateDoc = targetDoc.getAdapter(TemplateSourceDocument.class); 045 if (templateDoc != null && !Framework.isTestModeSet()) { 046 if (templateDoc.getTemplateBasedDocuments().size() > 0) { 047 TransactionHelper.setTransactionRollbackOnly(); 048 event.cancel(); 049 docCtx.newEvent(DocumentEventTypes.DOCUMENT_REMOVAL_CANCELED); 050 Framework.getService(EventProducer.class).fireEvent(event); 051 } 052 } 053 } 054 } 055 } 056}