/*
* 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) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors..  All rights reserved.
*/

package org.pentaho.reporting.engine.classic.extensions.parsers.reportdesigner.report;

import org.pentaho.reporting.engine.classic.core.AbstractReportDefinition;
import org.pentaho.reporting.engine.classic.core.DetailsFooter;
import org.pentaho.reporting.engine.classic.core.DetailsHeader;
import org.pentaho.reporting.engine.classic.core.GroupDataBody;
import org.pentaho.reporting.engine.classic.core.ItemBand;
import org.pentaho.reporting.engine.classic.core.NoDataBand;
import org.pentaho.reporting.engine.classic.core.filter.types.bands.GroupDataBodyType;
import org.pentaho.reporting.engine.classic.core.modules.parser.base.ReportParserUtil;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.IgnoreAnyChildReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

public class ReportGroupsReadHandler extends AbstractXmlReadHandler {
  private ReportGroupReadHandler groupReadHandler;

  public ReportGroupsReadHandler() {
  }

  /**
   * Returns the handler for a child element.
   *
   * @param uri     the URI of the namespace of the current element.
   * @param tagName the tag name.
   * @param atts    the attributes.
   * @return the handler or null, if the tagname is invalid.
   * @throws SAXException if there is a parsing error.
   */
  protected XmlReadHandler getHandlerForChild( final String uri, final String tagName, final Attributes atts )
    throws SAXException {
    if ( isSameNamespace( uri ) == false ) {
      return null;
    }
    if ( "padding".equals( tagName ) ) {
      return new IgnoreAnyChildReadHandler();
    }
    if ( "property".equals( tagName ) ) {
      return new IgnoreAnyChildReadHandler();
    }
    if ( "child".equals( tagName ) ) {
      final String type = atts.getValue( uri, "type" );
      if ( "org.pentaho.reportdesigner.crm.report.model.ReportGroup".equals( type ) ) {
        groupReadHandler = new ReportGroupReadHandler();
        return groupReadHandler;
      }
    }
    return null;
  }

  /**
   * Done parsing.
   *
   * @throws SAXException if there is a parsing error.
   */
  protected void doneParsing() throws SAXException {
    super.doneParsing();
    final AbstractReportDefinition report = (AbstractReportDefinition)
      getRootHandler().getHelperObject( ReportParserUtil.HELPER_OBJ_REPORT_NAME );


    if ( groupReadHandler != null ) {
      final GroupDataBody dataBody = (GroupDataBody) report.getChildElementByType( GroupDataBodyType.INSTANCE );
      final ItemBand itemBand = dataBody.getItemBand();
      final NoDataBand noDataBand = dataBody.getNoDataBand();
      final DetailsFooter detailsFooter = dataBody.getDetailsFooter();
      final DetailsHeader detailsHeader = dataBody.getDetailsHeader();

      report.setRootGroup( groupReadHandler.getGroup() );

      final GroupDataBody newDataBody = (GroupDataBody) report.getChildElementByType( GroupDataBodyType.INSTANCE );
      newDataBody.setItemBand( itemBand );
      newDataBody.setNoDataBand( noDataBand );
      newDataBody.setDetailsFooter( detailsFooter );
      newDataBody.setDetailsHeader( detailsHeader );
    }
  }

  /**
   * Returns the object for this element or null, if this element does not create an object.
   *
   * @return the object.
   * @throws SAXException if an parser error occured.
   */
  public Object getObject() throws SAXException {
    return null;
  }
}