001/* 002 * (C) Copyright 2006-2011 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 * Gagnavarslan ehf 019 */ 020package org.nuxeo.ecm.webdav.backend; 021 022import javax.servlet.http.HttpServletRequest; 023 024import org.nuxeo.ecm.core.api.CoreSession; 025import org.nuxeo.ecm.webdav.service.WIRequestFilter; 026import org.nuxeo.ecm.webengine.WebEngine; 027import org.nuxeo.ecm.webengine.model.WebContext; 028 029public abstract class AbstractBackendFactory implements BackendFactory { 030 031 @Override 032 public Backend getBackend(String path, HttpServletRequest request) { 033 if (request == null) { 034 throw new NullPointerException("null request"); 035 } 036 Backend backend = (Backend) request.getAttribute(WIRequestFilter.BACKEND_KEY); 037 if (backend == null) { 038 // create backend from WebEngine session 039 WebContext webContext = WebEngine.getActiveContext(); 040 if (webContext == null) { 041 throw new NullPointerException("null WebContext"); 042 } 043 CoreSession session = webContext.getCoreSession(); 044 if (session == null) { 045 throw new NullPointerException("null CoreSession"); 046 } 047 backend = createRootBackend(session); 048 request.setAttribute(WIRequestFilter.BACKEND_KEY, backend); 049 } 050 return backend.getBackend(path); 051 } 052 053 public abstract Backend createRootBackend(CoreSession session); 054 055}