/*
 * 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.iaik.config;

import java.sql.Driver;
import java.sql.DriverManager;
import java.util.Enumeration;

import at.gv.egovernment.moa.spss.server.config.ConfigurationProvider;
import iaik.pki.store.revocation.archive.ArchiveConfiguration;
import iaik.pki.store.revocation.archive.ArchiveParameters;
import iaik.pki.store.revocation.archive.ArchiveTypes;

/**
 * An implementation of the <code>ArchiveConfiguration</code> interface using
 * configuration data provided by the MOA configuration file.
 *
 * @see iaik.pki.store.revocation.archive.ArchiveConfiguration
 * @author Patrick Peck
 * @version $Id$
 */
public class ArchiveConfigurationImpl
    extends AbstractObservableConfiguration
    implements ArchiveConfiguration {

  /** The configuration parameters of the archive. */
  private final ArchiveParameters archiveParameters;

  /**
   * Create a new <code>ArchiveConfigurationImpl</code>.
   *
   * @param config The MOA configuration from which the configuration data is
   *               being read.
   */
  public ArchiveConfigurationImpl(ConfigurationProvider config) {
    final String jdbcUrl = config.getRevocationArchiveJDBCURL();
    this.archiveParameters = new DataBaseArchiveParameterImpl(jdbcUrl);

    // Register JDBC driver class
    if (jdbcUrl != null) {
      final String jdbcDriverClass = config.getRevocationArchiveJDBCDriverClass();
      try {
        Class.forName(jdbcDriverClass);
      } catch (final ClassNotFoundException e) {
        // TODO 20030709 GK Improve exception handling
        throw new RuntimeException("JDBC driver class \"" + jdbcDriverClass + " could not be found.");
      }

      final Enumeration regDrivers = DriverManager.getDrivers();
      boolean isRegistered = false;
      while (regDrivers.hasMoreElements()) {
        final Object currentDriver = regDrivers.nextElement();
        if (jdbcDriverClass.equals(currentDriver.getClass().getName())) {
          isRegistered = true;
        }
      }
      if (!isRegistered) {
        // Workaround for a driver which does not register itselve at invocation of
        // Class.forName(drvname)
        try {
          DriverManager.registerDriver((Driver) Class.forName(jdbcDriverClass).newInstance());
        } catch (final Exception e) {
          // TODO 20030709 GK Improve exception handling
          throw new RuntimeException("Registering JDBC driver \"" + jdbcDriverClass + " failed.");
        }
      }
    }
  }

  /**
   * Return the type of archive.
   *
   * This will always return <code>ArchiveTypes.DATABASE</code>.
   *
   * @return <code>ArchiveTypes.DATABASE</code>.
   * @see iaik.pki.store.revocation.archive.ArchiveConfiguration#getType()
   */
  @Override
  public String getType() {
    return ArchiveTypes.DATABASE;
  }

  /**
   * Return the <code>ArchiveParameters</code> describing this
   * <code>ArchiveConfiguration</code>.
   *
   * @return The archive parameters.
   * @see iaik.pki.store.revocation.archive.ArchiveConfiguration#getArchiveParameters()
   */
  @Override
  public ArchiveParameters getArchiveParameters() {
    return archiveParameters;
  }

}