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.modeler.util;
  
  import org.apache.cayenne.modeler.undo.JComboBoxUndoListener;
  import org.apache.cayenne.validation.ValidationException;
  
  import javax.swing.JComboBox;
  import java.awt.event.ActionListener;
  
  /**
   * @since 4.1
   */
  public abstract class ComboBoxAdapter<T> {
  
      private JComboBox<T> comboBox;
      private ActionListener listener;
  
      private JComboBoxUndoListener undoListener;
  
      protected ComboBoxAdapter(JComboBox<T> comboBox) {
          this.comboBox = comboBox;
          listener = e -> updateModel();
  
          undoListener = new JComboBoxUndoListener();
  
          comboBox.addActionListener(listener);
          comboBox.addItemListener(undoListener);
      }
  
      public void setItem(Object item) {
          comboBox.removeActionListener(listener);
          comboBox.removeItemListener(undoListener);
  
          try{
              comboBox.setSelectedItem(item);
          }
          finally {
              comboBox.addActionListener(listener);
              comboBox.addItemListener(undoListener);
          }
      }
  
      public JComboBox<T> getComboBox() {
          return comboBox;
      }
  
      /**
       * Updates bound model with document text.
       */
      protected abstract void updateModel(T item) throws ValidationException;
  
      public void updateModel() {
          updateModel((T)comboBox.getSelectedItem());
      }
  }
  