JLabelLocaleUpdateHandler.java example

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/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright (c) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors..  All rights reserved.
 */

package org.pentaho.reporting.engine.classic.core.modules.gui.commonswing.localization;

import java.awt.IllegalComponentStateException;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.swing.JLabel;

import org.pentaho.reporting.engine.classic.core.modules.gui.commonswing.SwingCommonModule;
import org.pentaho.reporting.libraries.base.util.Messages;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;

/**
 * Creation-Date: 30.11.2006, 13:04:07
 *
 * @author Thomas Morgner
 */
public class JLabelLocaleUpdateHandler implements PropertyChangeListener {
  private String resourceBundleName;
  private String resourceKey;
  private JLabel target;
  private Messages messages;

  public JLabelLocaleUpdateHandler( final JLabel target, final String resourceBundleName, final String resourceKey ) {
    this.target = target;
    this.resourceBundleName = resourceBundleName;
    this.resourceKey = resourceKey;
    this.messages =
        new Messages( target.getLocale(), SwingCommonModule.BUNDLE_NAME, ObjectUtilities
            .getClassLoader( SwingCommonModule.class ) );
  }

  /**
   * This method gets called when a bound property is changed.
   *
   * @param evt
   *          A PropertyChangeEvent object describing the event source and the property that has changed.
   */

  public void propertyChange( final PropertyChangeEvent evt ) {
    try {
      final Locale locale = target.getLocale();
      final ResourceBundle bundle = ResourceBundle.getBundle( resourceBundleName, locale );
      final String string = bundle.getString( resourceKey );
      target.setText( string );
    } catch ( IllegalComponentStateException ice ) {
      target.setText( messages.getString( "USER_NO_PARENT_ERROR", resourceKey ) ); //$NON-NLS-1$
    } catch ( MissingResourceException mre ) {
      target.setText( messages.getString( "USER_NO_PARENT_ERROR", resourceKey ) ); //$NON-NLS-1$
      target.setText( messages.getString( "USER_MISSING_RESOURCE_ERROR", resourceKey ) ); //$NON-NLS-1$
    }

  }
}