Sorting wrapper class list displayed on visual force page on the basis data of two fields

Use Case

Sorting the wrapper class list to be displayed on visualforce page on basis data from two fields.

Solution

We need to create different lists on the basis of data in one field and then we need to sort those lists using compareTo implemented in wrapper class. Finally adding those sorted lists in one list.

Apex Class:

Public class MainController{

Public List<WrapperClass> wrapperList {get;set};

public String sortBy{get;set;}

public String sortDir{get;set;}    

      Public class wrapperClass{

            Public Boolean IsVerified{get;set;}                                        

            Public String eName{get;set;}

            Public Decimal marksObtained{get;set;}

            Public String sortDir1 {get;set;}

        Public String sortBy1 {get;set;}

           

            Public wrapperClass(Boolean verify, String tmpName , Decimal marks){

                  this.IsVerified = verify;

                  this.eName = tmpName;

                  this.marksObtained = marks;

            }

            Public Integer compareTo(Object compareTo){

                  WrapperClass wr = (WrapperClass)compareTo;

                  Integer returnValue = 0;

                        Integer orderInd = sortDir1 == 'DESC' ? -1: 1;

                 

                  if( sortBy1.equalsIgnoreCase('Name') ) {

                returnValue = eName > wr.eName ? orderInd: (eName < wr.eName? orderInd*-1 : 0) ;

            }else if( sortBy1.equalsIgnoreCase('marks') ){

                        returnValue = marksObtained > wr.marksObtained ?  orderInd : (marksObtained < wr.marksObtained ? orderInd*-1 : 0);

            }

            }

      }

     

      Public void setSorting(){    

            this.sortBy =ApexPages.currentPage().getParameters().get(SORT_BY);

            this.sortDir=ApexPages.currentPage().getParameters().get(SORT_DIR);    

            List<WrapperClass> finalList = new List<WrapperClass>();

            List<WrapperClass> verifiedList = new List<WrapperClass>();

            List<WrapperClass> nonVerifiedList = new List<WrapperClass>();

           

        for(WrapperClass cl : wrapperList){

                  if(cl.Isverified){

                        verifiedlist.add(cl)

                  }

                  else

                        nonVerifiedList.add(cl);

        }

            for(WrapperClass li : verifiedlist){

                  li.sortBy1 = sortBy;

                  li.sortDir1 = sortDir;

            }

                  verifiedlist.sort();

                  finalList.addAll(verifiedlist);

            for(WrapperClass lis : nonVerifiedlist){

                  lis.sortBy1 = sortBy;

                  lis.sortDir1 = sortDir;

            }

                  nonVerifiedlist.sort();

                  finalList.addAll(nonVerifiedlist);                   

            wrapperList = finalList;

      }

}//Main Class

Visualforce Page:

<apex:form id="Form">

<apex:pageBlock id="pageBlock" >

      <table id="myData">                  

      <thead>

            <tr>    

            <th title="Name"></th>

            <th title="Marks Obtained">

                  <apex:commandLink action="{!setSorting}" value="marks" reRender="DataPanel">

                        <img src="/s.gif" class="sort{!if(sortDir=='ASC','Asc','Desc')}" style="display:{!if(sortBy=='marks','','none')}" />

                        <apex:param value="marks" name="sortBy" />

                        <apex:param value="{!IF(sortBy='marks',IF(sortDir='ASC','DESC','ASC'),'ASC')}" name="sortDir" />

                  </apex:commandLink>

            </th>

            <th title="Verified"></th>

      </thead>

      </table>

      <apex:outputPanel id="DataPanel">

            <table>

            <apex:repeat value="{!wrapperList}" var="row">

            <tr>

            <td>{!row.Name}</td>

            <td>{!row.marksObtained}</td>

            <td>{!row.IsVerified}</td>

            </tr>

            </apex:repeat>

            <table>

      </apex:outputPanel>

</apex:pageBlock>

</apex:form>