comparison to integer should be done via equals

rest-api/src/main/java/lcsb/mapviewer/api/projects/ProjectController.java

@@ -15,6 +15,8 @@ import org.springframework.security.core.Authentication;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.bind.annotation.*;
 
+import com.sun.istack.NotNull;
+
 import lcsb.mapviewer.api.*;
 import lcsb.mapviewer.model.cache.FileEntry;
 import lcsb.mapviewer.model.map.layout.ProjectBackground;

rest-api/src/main/java/lcsb/mapviewer/api/projects/ProjectRestImpl.java

@@ -768,7 +768,7 @@ public class ProjectRestImpl extends BaseRestImpl {
   public ProjectBackground getBackgroundById(String projectId, Integer backgroundId) throws ObjectNotFoundException {
     List<ProjectBackground> backgrounds = getProjectByProjectId(projectId).getProjectBackgrounds();
     for (ProjectBackground projectBackground : backgrounds) {
-      if (projectBackground.getId() == backgroundId) {
+      if (Objects.equals(projectBackground.getId(), backgroundId)) {
         Hibernate.initialize(projectBackground.getProjectBackgroundImageLayer());
         return projectBackground;
       }
@@ -796,7 +796,10 @@ public class ProjectRestImpl extends BaseRestImpl {
       if (key.equalsIgnoreCase("description")) {
         background.setDescription((String) value);
       } else if (key.equalsIgnoreCase("id")) {
-        if (value != overlayId) {
+        if (!Objects.equals(value , overlayId)) {
+          logger.error("!!!!!!!!!!!!!!!!!");
+          logger.error(value);
+          logger.error(overlayId);
           throw new QueryException("cannot change id");
         }
       } else if (key.equalsIgnoreCase("name")) {