content: /*****************************************************************
   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   ****************************************************************/
  
  package org.apache.cayenne.pref;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.prefs.BackingStoreException;
  import java.util.prefs.Preferences;
  
  import org.apache.cayenne.modeler.Application;
  import org.apache.cayenne.modeler.pref.DBConnectionInfo;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * An editor for modifying CayennePreferenceService.
   * 
   */
  public abstract class CayennePreferenceEditor implements PreferenceEditor {
  
      protected boolean restartRequired;
      protected CayenneProjectPreferences cayenneProjectPreferences;
      private Map<Preferences, Map<String, String>> changedPreferences;
      private Map<Preferences, Map<String, String>> removedPreferences;
      private Map<Preferences, Map<String, Boolean>> changedBooleanPreferences;
      private List<Preferences> removedNode;
      private List<Preferences> addedNode;
  
      private static Logger logger = LoggerFactory.getLogger(CayennePreferenceEditor.class);
  
      public CayennePreferenceEditor(CayenneProjectPreferences cayenneProjectPreferences) {
          this.cayenneProjectPreferences = cayenneProjectPreferences;
          this.changedPreferences = new HashMap<>();
          this.removedPreferences = new HashMap<>();
          this.changedBooleanPreferences = new HashMap<>();
          this.removedNode = new ArrayList<>();
          this.addedNode = new ArrayList<>();
      }
  
      public List<Preferences> getAddedNode() {
          return addedNode;
      }
  
      public List<Preferences> getRemovedNode() {
          return removedNode;
      }
  
      public Map<Preferences, Map<String, String>> getRemovedPreferences() {
          return removedPreferences;
      }
  
      public Map<Preferences, Map<String, String>> getChangedPreferences() {
          return changedPreferences;
      }
  
      public Map<Preferences, Map<String, Boolean>> getChangedBooleanPreferences() {
          return changedBooleanPreferences;
      }
  
      protected boolean isRestartRequired() {
          return restartRequired;
      }
  
      protected void setRestartRequired(boolean restartOnSave) {
          this.restartRequired = restartOnSave;
      }
  
      public void save() {
          cayenneProjectPreferences.getDetailObject(DBConnectionInfo.class).save();
  
          if (restartRequired) {
              restart();
          }
  
          // update boolean preferences
          for (Map.Entry<Preferences, Map<String, Boolean>> entry : changedBooleanPreferences.entrySet()) {
              Preferences pref = entry.getKey();
              for (Map.Entry<String, Boolean> en : entry.getValue().entrySet()) {
                  pref.putBoolean(en.getKey(), en.getValue());
              }
          }
  
          // update string preferences
          for (Map.Entry<Preferences, Map<String, String>> entry : changedPreferences.entrySet()) {
              Preferences pref = entry.getKey();
              for (Map.Entry<String, String> en : entry.getValue().entrySet()) {
                  pref.put(en.getKey(), en.getValue());
              }
          }
  
          // remove string preferences
          for (Map.Entry<Preferences, Map<String, String>> entry : removedPreferences.entrySet()) {
              Preferences pref = entry.getKey();
              for (Map.Entry<String, String> en : entry.getValue().entrySet()) {
                  pref.remove(en.getKey());
              }
          }
  
          // remove preferences node
          for (Preferences pref : removedNode) {
              try {
                  pref.removeNode();
              } catch (BackingStoreException e) {
                  logger.warn("Error removing preferences");
              }
          }
  
          Application.getInstance().initClassLoader();
      }
  
      public void revert() {
          // remove added preferences node
          for (Preferences pref : addedNode) {
              try {
                  pref.removeNode();
              } catch (BackingStoreException ignored) {
              }
          }
  
          cayenneProjectPreferences.getDetailObject(DBConnectionInfo.class).cancel();
          restartRequired = false;
      }
  
      protected abstract void restart();
  }
  