Package org.pentaho.reporting.engine.classic.core.designtime.compat

Source Code of org.pentaho.reporting.engine.classic.core.designtime.compat.CompatibilityUpdater

/*!
* 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) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.core.designtime.compat;

import org.pentaho.reporting.engine.classic.core.AbstractReportDefinition;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.engine.classic.core.ReportDefinition;
import org.pentaho.reporting.engine.classic.core.ReportElement;
import org.pentaho.reporting.engine.classic.core.SubReport;
import org.pentaho.reporting.engine.classic.core.function.Expression;
import org.pentaho.reporting.engine.classic.core.metadata.ExpressionMetaData;
import org.pentaho.reporting.engine.classic.core.parameters.ParameterDefinitionEntry;
import org.pentaho.reporting.engine.classic.core.parameters.ReportParameterDefinition;
import org.pentaho.reporting.engine.classic.core.style.StyleKey;
import org.pentaho.reporting.engine.classic.core.util.AbstractStructureVisitor;

public class CompatibilityUpdater extends AbstractStructureVisitor
{
  private CompatibilityConverter[] converters;
  private CompatibilityConverter currentConverter;
  private int version;

  public CompatibilityUpdater()
  {
    converters = CompatibilityConverterRegistry.getInstance().getConverters();
  }

  public void performUpdate(final MasterReport report)
  {
    final Integer versionRaw = report.getCompatibilityLevel();
    if (versionRaw == null)
    {
      version = -1;
    }
    else
    {
      version = versionRaw.intValue();
    }
    if (version == -1)
    {
      return;
    }
    performUpdateInternal(report);
    report.setCompatibilityLevel(null);
  }

  public void performUpdate(final SubReport report)
  {
    final ReportDefinition reportDefinition = report.getMasterReport();
    if (reportDefinition == null)
    {
      return;
    }

    final MasterReport masterReport = (MasterReport) reportDefinition;
    final Integer versionRaw = masterReport.getCompatibilityLevel();
    if (versionRaw == null)
    {
      version = -1;
    }
    else
    {
      version = versionRaw.intValue();
    }
    if (version == -1)
    {
      return;
    }
    performUpdateInternal(report);
  }

  protected void performUpdateInternal (final AbstractReportDefinition report)
  {
    for (int i = 0; i < converters.length; i++)
    {
      final CompatibilityConverter converter = converters[i];
      if (converter.getTargetVersion() < version)
      {
        // this converter is for an older version
        // the report should already be up to date for this release.
        continue;
      }

      // set the current converter and convert the complete report to the
      // converter's level.
      currentConverter = converter;
      super.inspect(report);
    }
  }

  protected void inspectElement(final ReportElement element)
  {
    currentConverter.inspectElement(element);
  }

  protected void inspectAttributeExpression(final ReportElement element,
                                            final String attributeNamespace,
                                            final String attributeName,
                                            final Expression expression,
                                            final ExpressionMetaData expressionMetaData)
  {
    currentConverter.inspectAttributeExpression(element, attributeNamespace, attributeName, expression, expressionMetaData);
  }

  protected void inspectStyleExpression(final ReportElement element,
                                        final StyleKey styleKey,
                                        final Expression expression,
                                        final ExpressionMetaData expressionMetaData)
  {
    currentConverter.inspectStyleExpression(element, styleKey, expression, expressionMetaData);
  }

  protected void inspectExpression(final AbstractReportDefinition report, final Expression expression)
  {
    currentConverter.inspectExpression(report, expression);
  }

  protected void inspectParameter(final AbstractReportDefinition report,
                                  final ReportParameterDefinition definition,
                                  final ParameterDefinitionEntry parameter)
  {
    currentConverter.inspectParameter(report, definition, parameter);
  }

  protected void inspectDataSource(final AbstractReportDefinition report, final DataFactory dataFactory)
  {
    currentConverter.inspectDataSource(report, dataFactory);
  }
}
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