001    /**
002     * ========================================
003     * JFreeReport : a free Java report library
004     * ========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/
007     *
008     * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: AbstractExportActionPlugin.java 3525 2007-10-16 11:43:48Z tmorgner $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    
032    package org.jfree.report.modules.gui.swing.common;
033    
034    import java.awt.Dialog;
035    import java.awt.Frame;
036    import java.awt.Window;
037    import java.lang.reflect.Constructor;
038    
039    import org.jfree.report.flow.ReportJob;
040    import org.jfree.util.Configuration;
041    import org.jfree.util.Log;
042    import org.jfree.util.ObjectUtilities;
043    
044    /**
045     * Creation-Date: 02.12.2006, 14:21:07
046     *
047     * @author Thomas Morgner
048     */
049    public abstract class AbstractExportActionPlugin extends AbstractActionPlugin
050      implements ExportActionPlugin
051    {
052    
053      public AbstractExportActionPlugin()
054      {
055      }
056    
057    
058      /**
059       * Creates a progress dialog, and tries to assign a parent based on the given
060       * preview proxy.
061       *
062       * @return the progress dialog.
063       */
064      protected ExportDialog createExportDialog(final String className)
065          throws InstantiationException
066      {
067        final Window proxy = getContext().getWindow();
068        if (proxy instanceof Frame)
069        {
070          final ClassLoader classLoader =
071              ObjectUtilities.getClassLoader(AbstractActionPlugin.class);
072          try
073          {
074            final Class aClass = classLoader.loadClass(className);
075            final Constructor constructor =
076                aClass.getConstructor(new Class[]{Frame.class});
077            return (ExportDialog) constructor.newInstance(new Object[]{proxy});
078          }
079          catch (Exception e)
080          {
081            Log.error("Failed to instantiate Export-Dialog with a 'Frame'-parent: " + className);
082          }
083        }
084        else if (proxy instanceof Dialog)
085        {
086          final ClassLoader classLoader =
087              ObjectUtilities.getClassLoader(AbstractActionPlugin.class);
088          try
089          {
090            final Class aClass = classLoader.loadClass(className);
091            final Constructor constructor =
092                aClass.getConstructor(new Class[]{Dialog.class});
093            return (ExportDialog) constructor.newInstance(new Object[]{proxy});
094          }
095          catch (Exception e)
096          {
097            Log.error("Failed to instantiate Export-Dialog with a 'Dialog'-parent: " + className, e);
098          }
099        }
100    
101        final Object fallBack = ObjectUtilities.loadAndInstantiate
102            (className, AbstractActionPlugin.class, ExportDialog.class);
103        if (fallBack != null)
104        {
105          return (ExportDialog) fallBack;
106        }
107    
108        Log.error ("Failed to instantiate Export-Dialog without a parent: " + className);
109        throw new InstantiationException("Failed to instantiate Export-Dialog");
110      }
111    
112    
113      /**
114       * Exports a report.
115       *
116       * @param report the report.
117       * @return A boolean.
118       */
119      public boolean performShowExportDialog(final ReportJob job, final String configKey)
120      {
121        try
122        {
123          final Configuration configuration = job.getConfiguration();
124          final String dialogClassName = configuration.getConfigProperty(configKey);
125          final ExportDialog dialog = createExportDialog(dialogClassName);
126          return dialog.performQueryForExport(job, getContext());
127        }
128        catch (InstantiationException e)
129        {
130          Log.error ("Unable to configure the report job.");
131          setStatusText("Unable to configure the report job.");
132          return false;
133        }
134      }
135    
136    }