001/*
002 * Syncany, www.syncany.org
003 * Copyright (C) 2011-2016 Philipp C. Heckel <philipp.heckel@gmail.com>
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU General Public License for more details.
014 *
015 * You should have received a copy of the GNU General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package org.syncany.operations.daemon.messages.api;
019
020import java.util.logging.Level;
021import java.util.logging.Logger;
022
023import org.syncany.util.StringUtil;
024
025/**
026 * The message factory serializes and deserializes messages sent to
027 * or from the daemon via the REST/WS API.
028 *
029 * @author Philipp C. Heckel (philipp.heckel@gmail.com)
030 */
031public abstract class MessageFactory {
032        protected static final Logger logger = Logger.getLogger(MessageFactory.class.getSimpleName());
033
034        protected static Class<? extends Message> getMessageClass(String requestType) throws Exception {
035                String thisPackage = Message.class.getPackage().getName();
036                String parentPackage = thisPackage.substring(0, thisPackage.lastIndexOf("."));
037                String camelCaseMessageType = StringUtil.toCamelCase(requestType);
038                String fqMessageClassName = parentPackage + "." + camelCaseMessageType;
039
040                // Try to load!
041                try {
042                        return Class.forName(fqMessageClassName).asSubclass(Message.class);
043                }
044                catch (Exception e) {
045                        logger.log(Level.INFO, "Could not find FQCN " + fqMessageClassName, e);
046                        throw new Exception("Cannot read request class from request type: " + requestType, e);
047                }
048        }
049}