content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it 
   * under the terms of the GNU Lesser General Public License as published by 
   * the Free Software Foundation; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * This library 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 Lesser General Public 
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * -----------------
   * DetailEditor.java
   * -----------------
   * (C) Copyright 2004, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: DetailEditor.java,v 1.3 2005/10/18 13:23:37 mungady Exp $
   *
   * Changes
   * -------
   * 07-Jun-2004 : Added JCommon header (DG);
   *
   */
  
  package org.jfree.ui.tabbedui;
  
  import javax.swing.JComponent;
  
  /**
   * A detail editor.
   *
   * @author Thomas Morgner
   */
  public abstract class DetailEditor extends JComponent {
  
      /** The object, that is edited. */
      private Object object;
      /** whether the edit process has been confirmed (user pressed OK). */
      private boolean confirmed;
  
      /**
       * Creates a new editor.
       */
      public DetailEditor() {
          // nothing required
      }
  
      /**
       * Updates the object.
       */
      public void update() {
          if (this.object == null) {
              throw new IllegalStateException();
          }
          else {
              updateObject(this.object);
          }
          setConfirmed(false);
      }
  
      /**
       * Returns the object.
       * 
       * @return The object.
       */
      public Object getObject() {
          return this.object;
      }
  
      /**
       * Sets the object to be edited.
       * 
       * @param object  the object.
       */
      public void setObject(final Object object) {
          if (object == null) {
              throw new NullPointerException();
          }
          this.object = object;
          setConfirmed(false);
          fillObject();
      }
  
      /**
       * Parses an integer.
       * 
       * @param text  the text.
       * @param def  the default value.
       * 
       * @return The parsed integer, or the default value if the string didn't contain a
       *         value.
       */
      protected static int parseInt(final String text, final int def) {
          try {
              return Integer.parseInt(text);
          }
          catch (NumberFormatException fe) {
              return def;
          }
      }
  
      /**
       * Clears the editor.
       */
      public abstract void clear();
  
      /**
       * Edits the object. The object itself should not be modified, until
       * update or create was called.
       */
      protected abstract void fillObject();
  
      /**
       * Updates the object.
       * 
       * @param object  the object.
       */
      protected abstract void updateObject(Object object);
  
      /**
       * Returns the confirmed flag.
       * 
       * @return The confirmed flag.
       */
      public boolean isConfirmed() {
          return this.confirmed;
      }
  
      /**
       * Sets the confirmed flag.
       * 
       * @param confirmed  the confirmed flag.
       */
      protected void setConfirmed(final boolean confirmed) {
          final boolean oldConfirmed = this.confirmed;
          this.confirmed = confirmed;
          firePropertyChange("confirmed", oldConfirmed, confirmed);
      }
  
      
  }
  