Source for org.jfree.report.flow.streaming.StreamingReportProcessor

   1: /**
   2:  * ========================================
   3:  * JFreeReport : a free Java report library
   4:  * ========================================
   5:  *
   6:  * Project Info:  http://reporting.pentaho.org/
   7:  *
   8:  * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
   9:  *
  10:  * This library is free software; you can redistribute it and/or modify it under the terms
  11:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
  12:  * either version 2.1 of the License, or (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  15:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16:  * See the GNU Lesser General Public License for more details.
  17:  *
  18:  * You should have received a copy of the GNU Lesser General Public License along with this
  19:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20:  * Boston, MA 02111-1307, USA.
  21:  *
  22:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  23:  * in the United States and other countries.]
  24:  *
  25:  * ------------
  26:  * $Id: StreamingReportProcessor.java 2775 2007-05-04 09:43:04Z taqua $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: package org.jfree.report.flow.streaming;
  32: 
  33: import org.jfree.layouting.DefaultLayoutProcess;
  34: import org.jfree.layouting.LayoutProcess;
  35: import org.jfree.layouting.output.OutputProcessor;
  36: import org.jfree.report.DataSourceException;
  37: import org.jfree.report.ReportDataFactoryException;
  38: import org.jfree.report.ReportProcessingException;
  39: import org.jfree.report.flow.AbstractReportProcessor;
  40: import org.jfree.report.flow.LibLayoutReportTarget;
  41: import org.jfree.report.flow.ReportJob;
  42: import org.jfree.resourceloader.ResourceKey;
  43: import org.jfree.resourceloader.ResourceManager;
  44: 
  45: /**
  46:  * This is written to use LibLayout. It will never work with other report
  47:  * targets.
  48:  *
  49:  * @author Thomas Morgner
  50:  */
  51: public class StreamingReportProcessor extends AbstractReportProcessor
  52: {
  53:   private OutputProcessor outputProcessor;
  54: 
  55:   public StreamingReportProcessor()
  56:   {
  57:   }
  58: 
  59:   public OutputProcessor getOutputProcessor()
  60:   {
  61:     return outputProcessor;
  62:   }
  63: 
  64:   public void setOutputProcessor(final OutputProcessor outputProcessor)
  65:   {
  66:     this.outputProcessor = outputProcessor;
  67:   }
  68: 
  69:   public void processReport(final ReportJob job)
  70:       throws ReportDataFactoryException, DataSourceException, ReportProcessingException
  71:   {
  72:     if (job == null)
  73:     {
  74:       throw new NullPointerException();
  75:     }
  76: 
  77:     synchronized (job)
  78:     {
  79:       // first, compute the globals
  80:       processReportRun(job, createTarget(job));
  81:       // second, paginate (this splits the stream into flows)
  82:       processReportRun(job, createTarget(job));
  83:       // third, generate the content.
  84:       processReportRun(job, createTarget(job));
  85:     }
  86:   }
  87: 
  88:   protected LibLayoutReportTarget createTarget(final ReportJob job)
  89:           throws ReportProcessingException
  90:   {
  91:     if (outputProcessor == null)
  92:     {
  93:       throw new IllegalStateException(
  94:               "OutputProcessor is invalid.");
  95:     }
  96:     final LayoutProcess layoutProcess =
  97:         new DefaultLayoutProcess(outputProcessor);
  98:     final ResourceManager resourceManager = job.getReportStructureRoot().getResourceManager();
  99:     final ResourceKey resourceKey = job.getReportStructureRoot().getBaseResource();
 100: 
 101:     return new LibLayoutReportTarget
 102:             (job, resourceKey, resourceManager, layoutProcess);
 103:   }
 104: }