Package org.pentaho.reporting.engine.classic.wizard.writer

Source Code of org.pentaho.reporting.engine.classic.wizard.writer.WizardSpecificationWriteHandler

/*
* 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) 2009 Pentaho Corporation.  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.wizard.writer;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.BufferedOutputStream;

import org.pentaho.reporting.engine.classic.core.ClassicEngineBoot;
import org.pentaho.reporting.engine.classic.core.AbstractReportDefinition;
import org.pentaho.reporting.engine.classic.core.ReportProcessingException;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterException;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterHandler;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterState;
import org.pentaho.reporting.engine.classic.wizard.WizardCoreModule;
import org.pentaho.reporting.engine.classic.wizard.WizardProcessorUtil;
import org.pentaho.reporting.engine.classic.wizard.model.WizardSpecification;
import org.pentaho.reporting.engine.classic.wizard.model.DetailFieldDefinition;
import org.pentaho.reporting.engine.classic.wizard.model.GroupDefinition;
import org.pentaho.reporting.libraries.docbundle.BundleUtilities;
import org.pentaho.reporting.libraries.docbundle.WriteableDocumentBundle;
import org.pentaho.reporting.libraries.xmlns.common.AttributeList;
import org.pentaho.reporting.libraries.xmlns.writer.DefaultTagDescription;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriter;

/**
* Todo: Document Me
*
* @author Thomas Morgner
*/
public class WizardSpecificationWriteHandler implements BundleWriterHandler
{
  public WizardSpecificationWriteHandler()
  {
  }

  /**
   * Returns a relatively high processing order indicating this BundleWriterHandler should be one of the last processed
   * @return the relative processing order for this BundleWriterHandler
   */
  public int getProcessingOrder()
  {
    return 100000;
  }

  public String writeReport(final WriteableDocumentBundle bundle,
                            final BundleWriterState state)
      throws IOException, BundleWriterException
  {
    final AbstractReportDefinition report = state.getReport();
    try
    {
      final WizardSpecification specification =
          WizardProcessorUtil.loadWizardSpecification(report,
          state.getMasterReport().getResourceManager());
      if (specification == null)
      {
        return null;
      }

      final BundleWriterState wizardFileState = new BundleWriterState(state, "wizard-specification.xml");
      final OutputStream outputStream = new BufferedOutputStream(bundle.createEntry(wizardFileState.getFileName(), "text/xml"));
      final DefaultTagDescription tagDescription = new DefaultTagDescription(
          ClassicEngineBoot.getInstance().getGlobalConfig(), WizardCoreModule.TAG_DEF_PREFIX);
      final XmlWriter xmlWriter = new XmlWriter
          (new OutputStreamWriter(outputStream, "UTF-8"), tagDescription, "  ", "\n");

      final AttributeList rootAttrs = new AttributeList();
      rootAttrs.addNamespaceDeclaration("wizard", WizardCoreModule.NAMESPACE);

      xmlWriter.writeTag(WizardCoreModule.NAMESPACE, "wizard-specification", rootAttrs, XmlWriter.OPEN);

      final RootBandWriterHandler rootBandWriterHandler = new RootBandWriterHandler();
      rootBandWriterHandler.writeReport(bundle, wizardFileState, xmlWriter, specification.getColumnHeader(), "column-header");
      rootBandWriterHandler.writeReport(bundle, wizardFileState, xmlWriter, specification.getColumnFooter(), "column-footer");


      xmlWriter.writeTag(WizardCoreModule.NAMESPACE, "detail-fields", XmlWriter.OPEN);
      final DetailFieldDefinition[] detailFieldDefinitions = specification.getDetailFieldDefinitions();
      final DetailFieldDefinitionWriteHandler detailWriteHandler = new DetailFieldDefinitionWriteHandler();
      for (int i = 0; i < detailFieldDefinitions.length; i++)
      {
        final DetailFieldDefinition definition = detailFieldDefinitions[i];
        detailWriteHandler.writeReport(bundle, wizardFileState, xmlWriter, definition);
      }
      xmlWriter.writeCloseTag();

      xmlWriter.writeTag(WizardCoreModule.NAMESPACE, "group-definitions", XmlWriter.OPEN);
      final GroupDefinition[] groupDefinitions = specification.getGroupDefinitions();
      final GroupDefinitionWriteHandler groupDefinitionWriteHandler = new GroupDefinitionWriteHandler();
      for (int i = 0; i < groupDefinitions.length; i++)
      {
        final GroupDefinition definition = groupDefinitions[i];
        groupDefinitionWriteHandler.writeReport(bundle, wizardFileState, xmlWriter, definition);
      }
      xmlWriter.writeCloseTag();

      final WatermarkDefinitionWriterHandler watermarkDefinitionWriterHandler = new WatermarkDefinitionWriterHandler();
      watermarkDefinitionWriterHandler.writeReport(bundle, wizardFileState, xmlWriter, specification.getWatermarkDefinition());
      xmlWriter.writeCloseTag();
      xmlWriter.close();
      return wizardFileState.getFileName();
    }
    catch (final ReportProcessingException e)
    {
      throw new BundleWriterException("Failed to load wizard-specifiation",e);
    }
  }
}
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