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Blunder is an automated tool for analyzing chained exceptions in Java. It's usefull for classify, generate a customized error message and a list for possible solutions. The aim of this project is to provide a tool to identify different error contexts, analyze them and assemble a customized response to an application end-user or another application.

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/*
 *  Blunder is an automated tool for analyzing chained exceptions.
 *  Copyright (C) 2009 - Ambrosi Lucas 
 *
 *  This file is part of Blunder.
 *
 *  Blunder is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License 
 *  version 3 as published by the Free Software Foundation.
 *
 *  Blunder 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 Blunder. If not, see .
 */

package net.sf.blunder.service.persistence.opencsv;

import au.com.bytecode.opencsv.CSVWriter;
import au.com.bytecode.opencsv.bean.CsvToBean;
import au.com.bytecode.opencsv.bean.HeaderColumnNameMappingStrategy;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import net.sf.blunder.BlunderException;
import net.sf.blunder.model.ExceptionRelation;
import net.sf.blunder.service.persistence.InMemoryPersistenceService;
import org.apache.log4j.Logger;

public class BlunderOpenCsvService extends InMemoryPersistenceService {

   private static final Logger log = Logger.getLogger( BlunderOpenCsvService.class );

   /**
    * OpenCSV implementation of the data writer.
    * @see net.sf.blunder.service.persistence.InMemoryPersistenceService#writeData()
    */
   @Override
   public void writeData() {
      try {
         CSVWriter writer = new CSVWriter( getWriter() );
         List beans = new ArrayList();
         beans.addAll( getData().values() );

         if ( log.isDebugEnabled() ) {
            log.debug( "Writing relations [" + beans + "]" );
         }
         new BeanToCsv( true, false ).writeAllBeans( writer, beans, Object.class );
         writer.close();
         if ( log.isDebugEnabled() ) {
            log.debug( "Done!" );
         }
      } catch ( Exception e ) {
         log.error( "Error writing output file [" + e.getMessage() + "]" );
         throw new BlunderException( "Error writing output file", e );
      }
   }

   /**
    * OpenCSV implementation of the data reader.
    * @see net.sf.blunder.service.persistence.InMemoryPersistenceService#readData()
    */
   @Override
   public HashMap readData() {
      CsvToBean csv = new CsvToBean();
      Reader reader = getReader();
      HashMap list = new HashMap();
      try {
         log.info( "Reading object storage..." );
         log.debug( "Reading from [" + getFilePath() + "]" );
         HeaderColumnNameMappingStrategy strat = new HeaderColumnNameMappingStrategy();
         strat.setType( ExceptionRelation.class );

         @SuppressWarnings("unchecked")
         List objects = csv.parse( strat, reader ); 
         for ( ExceptionRelation er : objects ) {
            if ( log.isDebugEnabled() ) {
               log.debug( "Hidratated [" + er + "]" );
            }
            list.put( er.getId(), er );
         }
         log.debug( "All objects hidratated from [" + getFilePath() + "]" );
         return list;
      } catch ( Exception e ) {
         throw new BlunderException( "Error loading CSV data from [" + getFilePath() + "] " + e.toString(), e );
      } finally {
         if ( reader != null ) {
            try { reader.close(); } catch ( IOException e ) {}
         }
      }
   }

}