/*
    * Copyright 2003 - 2013 The eFaps Team
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   * Revision:        $Rev$
   * Last Changed:    $Date$
   * Last Changed By: $Author$
   */
  
  package org.efaps.update.schema.program.jasperreport;
  
  import java.io.UnsupportedEncodingException;
  import java.net.URL;
  import java.util.Map;
  import java.util.UUID;
  
  import javax.xml.parsers.ParserConfigurationException;
  
  import net.sf.jasperreports.engine.DefaultJasperReportsContext;
  import net.sf.jasperreports.engine.JRDataset;
  import net.sf.jasperreports.engine.JRException;
  import net.sf.jasperreports.engine.JRValueParameter;
  import net.sf.jasperreports.engine.JasperReportsContext;
  import net.sf.jasperreports.engine.design.JasperDesign;
  import net.sf.jasperreports.engine.query.JRQueryExecuter;
  import net.sf.jasperreports.engine.query.QueryExecuterFactory;
  import net.sf.jasperreports.engine.xml.JRXmlDigesterFactory;
  import net.sf.jasperreports.engine.xml.JRXmlLoader;
  
  import org.efaps.ci.CIAdminProgram;
  import org.efaps.update.schema.program.AbstractSourceImporter;
  import org.efaps.update.util.InstallationException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.SAXException;
  
  /**
   * Class is used to import a JasperReport into the eFaps DataBase.
   *
   * @author The eFaps Team
   * @version $Id$
   */
  public class JasperReportImporter
      extends AbstractSourceImporter
  {
      /**
       * Logging instance used to give logging information of this class.
       */
      private static final Logger LOG = LoggerFactory.getLogger(JasperReportImporter.class);
  
      /**
       * Design of the current report.
       */
      private JasperDesign jasperDesign;
  
      /**
       * @param _url  url to the file to be imported
       * @throws InstallationException on error
       */
      public JasperReportImporter(final URL _url)
          throws InstallationException
      {
          super(CIAdminProgram.JasperReport, _url);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      protected void readCode()
          throws InstallationException
      {
          super.readCode();
          try {
              DefaultJasperReportsContext.getInstance().setProperty("net.sf.jasperreports.query.executer.factory.eFaps",
                              FakeQueryExecuterFactory.class.getName());
  
              this.jasperDesign = new JRXmlLoader(DefaultJasperReportsContext.getInstance(),
                              JRXmlDigesterFactory.createDigester()).loadXML(newCodeInputStream());
          } catch (final ParserConfigurationException e) {
              throw new InstallationException("source code for " + getUrl() + "could not be parsed", e);
          } catch (final SAXException e) {
              throw new InstallationException("source code for " + getUrl() + "could not parsed", e);
          } catch (final JRException e) {
              // the error is very useful for the user so print it to the log
              LOG.error("The file {} cannot be read due to an JRException {}", getUrl(), e);
              throw new InstallationException("source code for " + getUrl() + "throws JRException", e);
          } catch (final UnsupportedEncodingException e) {
             throw new InstallationException("source code for " + getUrl() + "could not encoded", e);
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     protected String evalProgramName()
     {
         return this.jasperDesign.getName();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     protected String evalRevision()
     {
         return "1";
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     protected UUID evalUUID()
     {
         return this.jasperDesign.getUUID();
     }
 
     /**
      * Internal FakeExecuterFactory to be able to set them from esjp.
      */
     public static class FakeQueryExecuterFactory
         implements QueryExecuterFactory
     {
 
         @Override
         public JRQueryExecuter createQueryExecuter(final JRDataset _dataset,
                                                    final Map<String, ? extends JRValueParameter> _parameters)
             throws JRException
         {
             return null;
         }
 
         @Override
         public Object[] getBuiltinParameters()
         {
             return null;
         }
 
         @Override
         public JRQueryExecuter createQueryExecuter(final JasperReportsContext _jasperReportsContext,
                                                    final JRDataset _dataset,
                                                    final Map<String, ? extends JRValueParameter> _parameters)
             throws JRException
         {
             return null;
         }
 
         @Override
         public boolean supportsQueryParameterType(final String _className)
         {
             return false;
         }
     }
 }