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: StreamingReportProcessor.java 3048 2007-07-28 18:02:42Z tmorgner $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    package org.jfree.report.flow.streaming;
032    
033    import org.jfree.layouting.DefaultLayoutProcess;
034    import org.jfree.layouting.LayoutProcess;
035    import org.jfree.layouting.output.OutputProcessor;
036    import org.jfree.report.DataSourceException;
037    import org.jfree.report.ReportDataFactoryException;
038    import org.jfree.report.ReportProcessingException;
039    import org.jfree.report.flow.AbstractReportProcessor;
040    import org.jfree.report.flow.LibLayoutReportTarget;
041    import org.jfree.report.flow.ReportJob;
042    import org.jfree.resourceloader.ResourceKey;
043    import org.jfree.resourceloader.ResourceManager;
044    
045    /**
046     * This is written to use LibLayout. It will never work with other report
047     * targets.
048     *
049     * @author Thomas Morgner
050     */
051    public class StreamingReportProcessor extends AbstractReportProcessor
052    {
053      private OutputProcessor outputProcessor;
054    
055      public StreamingReportProcessor()
056      {
057      }
058    
059      public OutputProcessor getOutputProcessor()
060      {
061        return outputProcessor;
062      }
063    
064      public void setOutputProcessor(final OutputProcessor outputProcessor)
065      {
066        this.outputProcessor = outputProcessor;
067      }
068    
069      public void processReport(final ReportJob job)
070          throws ReportDataFactoryException, DataSourceException, ReportProcessingException
071      {
072        if (job == null)
073        {
074          throw new NullPointerException();
075        }
076    
077        synchronized (job)
078        {
079          // first, compute the globals
080          processReportRun(job, createTarget(job));
081          // second, paginate (this splits the stream into flows)
082          processReportRun(job, createTarget(job));
083          // third, generate the content.
084          processReportRun(job, createTarget(job));
085        }
086      }
087    
088      protected LibLayoutReportTarget createTarget(final ReportJob job)
089              throws ReportProcessingException
090      {
091        if (outputProcessor == null)
092        {
093          throw new IllegalStateException(
094                  "OutputProcessor is invalid.");
095        }
096        final LayoutProcess layoutProcess =
097            new DefaultLayoutProcess(outputProcessor);
098        final ResourceManager resourceManager = job.getReportStructureRoot().getResourceManager();
099        final ResourceKey resourceKey = job.getReportStructureRoot().getBaseResource();
100    
101        return new LibLayoutReportTarget
102                (job, resourceKey, resourceManager, layoutProcess);
103      }
104    }