content: /*
   * Copyright (C) 2012-2023 52°North Spatial Information Research GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *     - Apache License, version 2.0
   *     - Apache Software License, version 1.0
   *     - GNU Lesser General Public License, version 3
   *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
   *     - Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * 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 General
   * Public License for more details.
   */
  package org.n52.sos.web.install;
  
  import java.util.Iterator;
  import java.util.Map.Entry;
  
  import javax.inject.Inject;
  import javax.servlet.http.HttpSession;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.n52.faroe.SettingDefinition;
  import org.n52.faroe.SettingValue;
  import org.n52.faroe.SettingsService;
  import org.n52.sos.web.common.AbstractController;
  
  /**
   * TODO JavaDoc
   *
   * @author Christian Autermann
   */
  public class AbstractInstallController extends AbstractController {
      private static final Logger LOG = LoggerFactory.getLogger(AbstractInstallController.class);
      private static final String INSTALLATION_CONFIGURATION = "installation_configuration";
  
      @Inject
      private SettingsService settingsManager;
  
      public void setSettings(HttpSession session, InstallationConfiguration settings) {
          session.setAttribute(INSTALLATION_CONFIGURATION, settings);
      }
  
      public InstallationConfiguration getSettings(HttpSession s) {
          InstallationConfiguration c = (InstallationConfiguration) s
                  .getAttribute(INSTALLATION_CONFIGURATION);
          if (c == null) {
              c = new InstallationConfiguration();
              // try to read default settings from existing configuration
              try {
                  c.setSettings(this.settingsManager.getSettings());
                  // remove null values (in case new settings have been added
                  // since configuration was generated)
                  Iterator<Entry<SettingDefinition<?>, SettingValue<?>>> iterator
                          = c.getSettings().entrySet().iterator();
                  while (iterator.hasNext()) {
                      Entry<SettingDefinition<?>, SettingValue<?>> setting
                              = iterator.next();
                      if (setting.getValue() == null) {
                          iterator.remove();
                      }
                  }
              } catch (Exception ex) {
                  LOG.warn("Couldn't read existing settings", ex);
              }
              setSettings(s, c);
          }
          return c;
      }
  
  }
  