/*
 * Copyright 2003 Federal Chancellery Austria
 * MOA-SPSS has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */

package at.gv.egovernment.moa.spss.server.init;

import at.gv.egovernment.moa.spss.MOAException;
import at.gv.egovernment.moa.spss.api.Configurator;
import at.gv.egovernment.moa.spss.server.config.ConfigurationException;
import at.gv.egovernment.moa.spss.server.config.ConfigurationProvider;
import at.gv.egovernment.moa.spss.server.iaik.config.IaikConfigurator;
import iaik.server.ConfigurationData;

/**
 * Default implementation of <code>Configurator</code>.
 *
 * @author Patrick Peck
 * @version $Id$
 */
public class ConfiguratorImpl extends Configurator {
  /** whether the configuration has been initialized */
  private boolean initialized = false;

  StartupConfigurationHolder result;

  @Override
  public StartupConfigurationHolder getCurrentConfiguration() {
    return result;

  }

  @Override
  public StartupConfigurationHolder init() throws MOAException {
    if (!initialized) {
      result = SystemInitializer.init();
      initialized = true;

    }

    return result;

  }

  @Override
  public StartupConfigurationHolder update() throws MOAException {
    if (!initialized) {
      return null;
    }

    try {
      // reconfigure the system
      final ConfigurationProvider config = ConfigurationProvider.reload();
      final ConfigurationData iaikConfig = new IaikConfigurator().configure(config);
      result = new StartupConfigurationHolder(config, iaikConfig);
      return result;

    } catch (final MOAException e) {
      throw e;

    } catch (final Throwable t) {
      throw new ConfigurationException("MOA-SPSS initialization FAILED with a generic error", null, t);

    }
  }

}