Package it.eng.spagobi.engines.qbe.analysisstateloaders

Source Code of it.eng.spagobi.engines.qbe.analysisstateloaders.Version3QbeEngineAnalysisStateLoader

/**

SpagoBI - The Business Intelligence Free Platform

Copyright (C) 2005-2009 Engineering Ingegneria Informatica S.p.A.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

**/
package it.eng.spagobi.engines.qbe.analysisstateloaders;

import it.eng.qbe.query.serializer.json.QuerySerializationConstants;
import it.eng.spagobi.utilities.assertion.Assert;
import it.eng.spagobi.utilities.engines.SpagoBIEngineRuntimeException;

import org.apache.log4j.Logger;
import org.json.JSONArray;
import org.json.JSONObject;

/**
* @author Davide Zerbetto (davide.zerbetto@eng.it)
*/
public class Version3QbeEngineAnalysisStateLoader extends AbstractQbeEngineAnalysisStateLoader{

  public final static String FROM_VERSION = "3";
    public final static String TO_VERSION = "4";
   
  /** Logger component. */
    private static transient Logger logger = Logger.getLogger(Version3QbeEngineAnalysisStateLoader.class);
     
    public Version3QbeEngineAnalysisStateLoader() {
      super();
    }
   
    public Version3QbeEngineAnalysisStateLoader(IQbeEngineAnalysisStateLoader loader) {
      super(loader);
    }
   
  public JSONObject convert(JSONObject data) {
    JSONObject resultJSON;
    JSONObject catalogueJSON;
    JSONArray queriesJSON;
   
    logger.debug( "IN" );
    try {
      Assert.assertNotNull(data, "Data to convert cannot be null");
     
      logger.debug( "Converting from encoding version [" + FROM_VERSION + "] to encoding version [" + TO_VERSION + "] ..." );
      logger.debug( "Data to convert [" + data.toString() + "]");
     
      catalogueJSON = data.getJSONObject("catalogue");
      // fix query encoding ...
      queriesJSON = catalogueJSON.getJSONArray("queries");
      logger.debug( "In the stored catalogue there are  [" + queriesJSON.length() + "] to convert");
      for(int i = 0; i < queriesJSON.length(); i++) {
        convertQuery(queriesJSON.getJSONObject(i));     
      }
     
      resultJSON = new JSONObject();
      resultJSON.put("catalogue", catalogueJSON);
     
      logger.debug( "Converted data [" + resultJSON.toString() + "]");
      logger.debug( "Conversion from encoding version [" + FROM_VERSION + "] to encoding version [" + TO_VERSION + "] terminated succesfully" );
    }catch(Throwable t) {
      throw new SpagoBIEngineRuntimeException("Impossible to load from rowData [" + data + "]", t);
    } finally {
      logger.debug( "OUT" );
    }
     
   
    return resultJSON;
  }
 
  private void convertQuery(JSONObject queryJSON) {
    JSONArray havingsJSON;
    String queryId = null;
    JSONArray subqueriesJSON;
   
    logger.debug("IN");
   
    try {
      Assert.assertNotNull(queryJSON, "Query to be converted cannot be null");
      queryId = queryJSON.getString("id");
      logger.debug( "Converting query [" + queryId + "] ...");
      logger.debug( "Query content to be converted [" + queryJSON.toString() + "]");
     
      // adding having clause filters (empty)
      havingsJSON = new JSONArray();
      queryJSON.put(QuerySerializationConstants.HAVINGS, havingsJSON);
      logger.debug( "Empty having clause filters array added");
     
      // convert subqueries
      subqueriesJSON = queryJSON.getJSONArray( "subqueries" );
      logger.debug( "Query [" + queryId + "] have [" + subqueriesJSON.length() + "] subqueries to convert");
      for(int j = 0; j < subqueriesJSON.length(); j++) {
        logger.debug( "Converting subquery [" + (j+1)+ "] of query [" + queryId + "] ...");
        convertQuery( subqueriesJSON.getJSONObject(j) );
      }
     
      logger.debug( "Query [" + queryId + "] converted succesfully");
    }catch(Throwable t) {
      throw new SpagoBIEngineRuntimeException("Impossible convert query [" + queryId + "]", t);
    } finally {
      logger.debug( "OUT" );
    }
  }

}
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