/*
* 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) 2006 - 2013 Pentaho Corporation and Contributors.  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.demo.util;

import java.net.URL;

import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;

/**
 * The AbstractXmlDemoHandler helps to simplify demo reports which read their report definition from an XML file.
 *
 * @author Thomas Morgner
 */
public abstract class AbstractXmlDemoHandler extends AbstractDemoHandler
    implements XmlDemoHandler
{
  public AbstractXmlDemoHandler()
  {
  }

  protected MasterReport parseReport() throws ReportDefinitionException
  {
    final URL in = getReportDefinitionSource();
    if (in == null)
    {
      throw new ReportDefinitionException("ReportDefinition Source is invalid");
    }

    try
    {
      ResourceManager manager = new ResourceManager();
      Resource res = manager.createDirectly(in, MasterReport.class);
      return (MasterReport) res.getResource();
    }
    catch (Exception e)
    {
      throw new ReportDefinitionException("Parsing failed", e);
    }
  }

  public PreviewHandler getPreviewHandler()
  {
    return new DefaultPreviewHandler(this);
  }
}