global class casedelete1 implements Database.Batchable<sObject>{

public Map<Id ,User> users;

    global Database.QueryLocator start(Database.BatchableContext BC){

        users = new Map<Id ,User>([Select id,FirstName,CompanyName, PN__c from User where id='00528000000Gmqe'  ]);
        system.debug('@@@@@'+users);
        return Database.getQueryLocator([Select Id,Contactid,OwnerId  from Case where OwnerId IN :users.keyset()]);

    }



    global void execute(Database.BatchableContext BC, List<Case> scope)
    {


             List<Id> objcaseIds = new List<Id>();

             for(Case obj : Scope){
                 objcaseIds.add(obj.Contactid);
                 system.debug('casecontactids' +objcaseIds);
             }

             Map<Id, Contact> objconId = new Map<Id, Contact>([SELECT Id, LastName,FirstName FROM Contact WHERE Id in :objcaseIds]);
             system.debug('contactids' +objconId );
             Contact objA=new contact();
             String tempPersonalnumber='';
             User tempusr=new User();
             for(Case objB : Scope){

             tempusr = users.containskey(objB.ownerId) ? users.get(objB.ownerId) : null;
             tempPersonalnumber =  tempusr == null ? tempPersonalnumber  : string.valueof(tempusr.PN__c ) ;

            if(tempPersonalnumber  == Null || tempPersonalnumber =='')
             {
                  tempusr=users.get(objB.OwnerId);
                  system.debug('&&&'+tempusr);
                  tempusr.CompanyName='XXXXX';
                  system.debug('!!!!'+tempusr);
                  users.put(objB.OwnerId,tempusr);
                  system.debug('&&&&&'+users);
                  objA = objconId.get(objB.Contactid);
                  objA.LastName='XXXX';
                  objconId.put(objB.Contactid, objA);
            // }
             //else
             {
                  objA = objconId.get(objB.Contactid);
                  objA.FirstName='XXXX';
                  objconId.put(objB.Contactid, objA);
             }

             }
             update objconId.values();
             Update users.values();
             system.debug('updatedcontcats' +objconId);
             delete Scope;


    }



    global void finish(Database.BatchableContext BC)
    {

    }

}