ServiceFactory.java

/*
 * JMeter Report Server
 * Copyright (C) 2010 eXcentia
 * dev@sonar.codehaus.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
 */

package es.excentia.jmeter.report.server.service;

import java.util.HashMap;
import java.util.Map;

public class ServiceFactory {

  private static final String IMPL_PACKAGE = "es.excentia.jmeter.report.server.service.impl";

  private static Map<Class<? extends Service>, Service> map = new HashMap<Class<? extends Service>, Service>();

  @SuppressWarnings("unchecked")
  public static synchronized <T extends Service> T get(Class<T> service) {
    T serviceInstance = (T) map.get(service);
    if (serviceInstance == null) {
      try {
        Class<T> serviceImpl = (Class<T>) Class.forName(IMPL_PACKAGE + "."
            + service.getSimpleName() + "Impl");
        serviceInstance = serviceImpl.getConstructor((Class<?>[]) null)
            .newInstance((Object[]) null);
      } catch (Exception e) {
        throw new ServiceFactoryException(e);
      }
      map.put(service, serviceInstance);
    }
    return serviceInstance;
  }
}