001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (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.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 * Thierry Delprat 016 * Gagnavarslan ehf 017 */ 018package org.nuxeo.ecm.webdav.backend; 019 020import javax.servlet.http.HttpServletRequest; 021 022import org.nuxeo.ecm.core.api.CoreSession; 023import org.nuxeo.ecm.webdav.service.WIRequestFilter; 024import org.nuxeo.ecm.webengine.WebEngine; 025import org.nuxeo.ecm.webengine.model.WebContext; 026 027public abstract class AbstractBackendFactory implements BackendFactory { 028 029 @Override 030 public Backend getBackend(String path, HttpServletRequest request) { 031 if (request == null) { 032 throw new NullPointerException("null request"); 033 } 034 Backend backend = (Backend) request.getAttribute(WIRequestFilter.BACKEND_KEY); 035 if (backend == null) { 036 // create backend from WebEngine session 037 WebContext webContext = WebEngine.getActiveContext(); 038 if (webContext == null) { 039 throw new NullPointerException("null WebContext"); 040 } 041 CoreSession session = webContext.getCoreSession(); 042 if (session == null) { 043 throw new NullPointerException("null CoreSession"); 044 } 045 backend = createRootBackend(session); 046 request.setAttribute(WIRequestFilter.BACKEND_KEY, backend); 047 } 048 return backend.getBackend(path); 049 } 050 051 public abstract Backend createRootBackend(CoreSession session); 052 053}