updated logic to get letest alocation record

src/main/java/com/nisum/myteam/service/impl/ResourceService.java

@@ -51,17 +51,20 @@ public class ResourceService implements IResourceService {
 
 
     private Resource getLatestAllocation(List<Resource> resourceAllocList){
-        Resource latestAlloc = resourceAllocList.get(0);
-        for (Resource resource:resourceAllocList){
-            if(latestAlloc.getBillingEndDate().before(resource.getBillingEndDate()))
+        Resource latestAlloc = null;
+        if(!resourceAllocList.isEmpty()) {
+            latestAlloc = resourceAllocList.get(0);
+            for (Resource resource : resourceAllocList) {
+                if (latestAlloc.getBillingEndDate().before(resource.getBillingEndDate()))
                     latestAlloc = resource;
             }
+        }
         return latestAlloc;
     }
     public Resource addResource(Resource resourceReq, String loginEmpId) throws MyTeamException {
 
         List<Resource> resourceAllocList = resourceRepo.findByEmployeeIdAndProjectId(resourceReq.getEmployeeId(), resourceReq.getProjectId());
-//
+
         Resource prevAllocation = this.getLatestAllocation(resourceAllocList);
         if (prevAllocation != null) {
             if (prevAllocation.getBillingEndDate().compareTo(new Date()) == 0) {