/*
 * Copyright (c) 2003-2004, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.cm;

import org.osgi.service.cm.*;
import org.osgi.framework.*;

import java.util.*;

final class Update {
  final ServiceReference sr;
  final String pid;
  final String factoryPid;
  final ConfigurationDictionary configuration;
  ConfigurationDictionary processedConfiguration = null;

  public Update(ServiceReference sr, String pid, String factoryPid, ConfigurationDictionary configuration) {
    this.sr = sr;
    this.pid = pid;
    this.factoryPid = factoryPid;
    this.configuration = configuration;
  }

  public void doUpdate(PluginManager pm) throws ConfigurationException {
    if(sr == null) {
      return;
    }
    Object targetService = getTargetService();
    if(targetService == null) {
      return;
    }
    processedConfiguration = pm.callPluginsAndCreateACopy(sr, configuration);
    if(factoryPid == null) {
      update((ManagedService)targetService);
    } else {
      update((ManagedServiceFactory)targetService);
    }
  }

  private void update(ManagedService targetService) throws ConfigurationException {
    if(targetService == null) {
      return;
    }
    targetService.updated(processedConfiguration);
  }

  private void update(ManagedServiceFactory targetService) throws ConfigurationException {
    if(targetService == null) {
      return;
    }
    if(configuration == null) {
      targetService.deleted(pid);
    } else if(processedConfiguration == null) {
      if(Activator.r3TestCompliant()) {
        targetService.updated(pid, null);
      } else {
        targetService.deleted(pid);
      }
    } else {
      targetService.updated(pid, configuration);
    }
  }

  private Object getTargetService() {
    if(sr == null) {
      return null;
    } else {
      return Activator.bc.getService(sr);
    }
  }
}