Grouping and Sub Grouping Summing

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Rows as Displayed in Screen

Rows from Database

Rows grouping Logic

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List<RowsBean> outputList = RowsToBeDisplayedList;   
 
HashMap<String, ArrayList>  superGroupPoints    = new HashMap<String, ArrayList>();
HashMap<String, EWMDecimal> subGroupTotalPoints = new HashMap<String, Integer>();
 
String groupName = null;
String prevGroupName = null;
String superGroupName = null;
String prevSuperGroupName = null;
 
List<Map> subGroupPointsList = new ArrayList();
 
 
//Compute grouping totals
Iterator itr = cicCarryPointsList.iterator();
 
 while(itr.hasNext())
 {
  RowsBean rowBean = (RowsBean) itr.next();  
  superGroupName   = rowBean.getSuperGroupName();
  groupName      = rowBean.getGroupName();
   
          //Addition of points summed at Group Level
  if ((prevGroupName != null && !prevGroupName.equals(groupName))
      || (prevSuperGroupName != null &&    !prevSuperGroupName.equals(superGroupName)))
  {
     subGroupPointsList.add(subGroupTotalPoints);
     subGroupTotalPoints = new HashMap<String, Integer>();
  }
   
   
  //Rows at GroupLevel with Sub Groups should be added only when Super Group Changes
  if((prevSuperGroupName != null && !prevSuperGroupName.equals(superGroupName)))
  {       
     superGroupPoints.put(prevSuperGroupName, (ArrayList) subGroupPointsList);
     subGroupPointsList = new ArrayList();
  }
   
  Integer subGroupValPoints = rowBean.getPoints();       
 
  //If InvGrp level Map exists
  if (subGroupTotalPoints.get(groupName) != null) {
    Integer currSummedPointsAtGrpLevel = subGroupTotalPoints.get(groupName);
    currSummedPointsAtGrpLevel = currSummedPointsAtGrpLevel.add(subGroupValPoints);
    subGroupTotalPoints.put(groupName, currSummedPointsAtGrpLevel);      
  } else {
    subGroupTotalPoints.put(groupName, subGroupValPoints);
  }
   
  //Incase of last element the loop exits without adding last summed element
  //To prevent that we add it with out current and prev comparison
  if(!itr.hasNext())
  {
    subGroupPointsList.add(subGroupTotalPoints);       
    superGroupPoints.put(superGroupName, (ArrayList) subGroupPointsList);
  }
   
  prevSuperGroupName = superGroupName;
  prevGroupName = groupName;
}

Retrieval of Rows for Displaying in Screen

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String currentSuperGrouping = "";
String prevSuperGrouping    = "";
String currGrouping = "";
String prevGrouping = "";
String Value = "";
  
for (RowsBean rowBean : outputList)
{
  currentSuperGrouping = rowBean.getSuperGroupName();
  currGrouping = rowBean.getGroupName();
 
    //Level 1 - New Super Group Creation
  //New Super Group should be created when ever prevSuperGrouping and  currentSuperGrouping are different
    if (!currentSuperGrouping.equals(prevSuperGrouping))
    {
      .
      . 
      Super Group Row Creation HTML Code Goes Here
      .
      .
      .
    }
      
    //Level 2 - Group addition under Super Group
  //New Group should be created when ever SuperGroup or Group Changes
    if(!currGrouping.equals(prevGrouping) || !currentSuperGrouping.equals(prevSuperGrouping))
    {
      //Taking Group Level Maps List
      ArrayList GroupLevelMapList = superGroup.get(rowBean.getGroupName());
      Iterator  itr =  GroupLevelMapList.iterator();
        
    //Taking the Summed up value at Group Level from List
      while (itr.hasNext())
      {
         Map ii = (Map) itr.next();
         Points = ii.get(rowBean.getGroupName());     
      } 
        
      .
      . 
      Group Row Creation HTML Code Goes Here
      .
      .
      .
    }
      
    //Level 3 - Sub Group Rows Addition
  //Rows will be added
    if(currentSuperGrouping.equals(rowBean.getGroupName) || currentSuperGrouping.equals(rowBean.getSubGroupName))
    {
      .
      . 
      Sub Group Row Creation HTML Code Goes Here
      .
      .
      .
    }
      
    prevSuperGrouping    = currentSuperGrouping;
    prevGrouping = currGrouping;
}

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