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   *   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.modeler.pref;
  
  import java.io.File;
  import java.util.prefs.Preferences;
  
  import javax.swing.JFileChooser;
  
  import org.apache.cayenne.pref.CayennePreference;
  
  
  /**
   * Represents a preferred directory or file.
   * 
   */
  public class FSPath extends CayennePreference { 
  
      public static final String PATH_PROPERTY = "path";
      
      public FSPath(Preferences preferences) {
          setCurrentPreference(preferences);
      }
      
      public void updateFromChooser(JFileChooser chooser) {
          File file = chooser.getSelectedFile();
          if (file != null) {
              setDirectory(file);
          }
      }
  
      public void updateChooser(JFileChooser chooser) {
          File startDir = getExistingDirectory(false);
          if (startDir != null) {
              chooser.setCurrentDirectory(startDir);
          }
      }
  
      public void setDirectory(File file) {
  
          if (file.isFile()) {
              setPath(file.getParentFile().getAbsolutePath());
          }
          else {
              setPath(file.getAbsolutePath());
          }
      }
  
      public File getExistingDirectory(boolean create) {
          if (getPath() == null) {
              return null;
          }
  
          File path = new File(getPath());
          if (path.isDirectory()) {
              return path;
          }
  
          if (path.isFile()) {
              return path.getParentFile();
          }
  
          if (create) {
              path.mkdirs();
              return path;
          }
  
          return null;
      }
      
      public void setPath(String path) {
          getCurrentPreference().put(PATH_PROPERTY, path);
      }
      public String getPath() {
          return getCurrentPreference().get(PATH_PROPERTY, null);
      }
      
      public String getKey() {
          return getCurrentPreference().name();
      }
  }
  
  