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 package org.netbeans.server.uihandler.statistics;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import java.util.TreeMap;

 import java.util.logging.Level;

 import java.util.logging.LogRecord;

 import java.util.logging.Logger;

 import java.util.prefs.BackingStoreException;

 import java.util.prefs.Preferences;

 import javax.servlet.jsp.PageContext;

 import org.netbeans.modules.exceptions.entity.Exceptions;

 import org.netbeans.modules.exceptions.utils.PersistenceUtils;

 import org.netbeans.server.uihandler.Statistics;

 import org.netbeans.server.uihandler.Utils;

 import org.netbeans.server.uihandler.statistics.ExceptionReports.Data;

 /**

  *

  * @author Jindrich Sedek

  */

 public class ExceptionReports extends Statistics<ExceptionReports.Data>{

     private static Logger LOG = Logger.getLogger(ExceptionReports.class.getName());

     public ExceptionReports() {

         super("ExceptionReports");

     }

     protected Data newData() {

         return null;

     }

     protected Data process(LogRecord rec) {

         return null;

     }

     protected Data join(Data one, Data two) {

         return null;

     }

     protected Data finishSessionUpload(String userId, int sessionNumber, boolean initialParse, Data data) {

         return null;

     }

     @Override

     protected void registerPageContext(PageContext page, String name, Data data) {

         Data dat = new Data();

         Map<String, Integer> result = new TreeMap<String, Integer>();

         try {

             PersistenceUtils pUtils = Utils.getPersistenceUtils();

             dat.globalReportsNumber = pUtils.count(Exceptions.class);

             List<String> list = pUtils.getDistinct(Exceptions.class, "component");

             Iterator<String> iter = list.iterator();

             int minimumToShow = dat.globalReportsNumber / 50; // 2%

             while (iter.hasNext()){

                 //List<String> list =  iter.next();

                 String str = iter.next();

                 int count = pUtils.count(Exceptions.class, "entity.component = '" + str+"'");

                 if ((str != null)&&(count > minimumToShow)) result.put(str, count);

             }

         } catch (Exception ex) {

             // requires database and that is not present

             LOG.log(Level.WARNING, ex.getMessage(), ex);

         }

         dat.components = result;

         super.registerPageContext(page, name, dat);

     }

     public static final class Data{

         int globalReportsNumber;

         Map<String, Integer> components;

         public Data(){

             globalReportsNumber = 0;

         }

         public Data(int global){

             globalReportsNumber = global;

         }

         public int getGlobalReportsNumber(){

             return globalReportsNumber;

         }

         public Map<String, Integer> getComponents(){

             if (components!= null) return components;

             else return Collections.emptyMap();

         }

         public List<String> getSortedKeys(){

             List<String> list = new ArrayList(components.keySet());

             Collections.sort(list, new ReportsComparator());

             return list;

         }

         private final class ReportsComparator implements Comparator<String>{

             public int compare(String o1, String o2) {

                 return components.get(o2).compareTo(components.get(o1));

             }

         }

     }

     protected void write(Preferences pref, Data d) throws BackingStoreException {

         // data are saved in DB for this statistics

     }

     protected Data read(Preferences pref) throws BackingStoreException {

         return null; // nothing is needed to be done

     }

 }