Program: 8501
Project: 8501
Buggy source:
/** 
 * Retrieve a specific entity.
 * @param request
 * @param uriBuilder
 * @param repository
 * @param id
 * @return
 * @throws IOException
 */
@SuppressWarnings({"String_Node_Str"}) @RequestMapping(value="String_Node_Str",method=RequestMethod.GET) @ResponseBody public ResponseEntity<?> entity(ServletServerHttpRequest request,UriComponentsBuilder uriBuilder,@PathVariable String repository,@PathVariable String id) throws IOException {
  URI baseUri=uriBuilder.build().toUri();
  RepositoryMetadata repoMeta=repositoryMetadataFor(repository);
  if (!repoMeta.exportsMethod(CrudMethod.FIND_ONE)) {
    return negotiateResponse(request,HttpStatus.METHOD_NOT_ALLOWED,new HttpHeaders(),null);
  }
  Serializable serId=stringToSerializable(id,(Class<? extends Serializable>)repoMeta.entityMetadata().idAttribute().type());
  CrudRepository repo=repoMeta.repository();
  Object entity=repo.findOne(serId);
  if (null == entity) {
    return notFoundResponse(request);
  }
  HttpHeaders headers=new HttpHeaders();
  if (null != repoMeta.entityMetadata().versionAttribute()) {
    Object version=repoMeta.entityMetadata().versionAttribute().get(entity);
    if (null != version) {
      List<String> etags=request.getHeaders().getIfNoneMatch();
      for (      String etag : etags) {
        if (("String_Node_Str" + version.toString() + "String_Node_Str").equals(etag)) {
          return negotiateResponse(request,HttpStatus.NOT_MODIFIED,new HttpHeaders(),null);
        }
      }
      headers.set("String_Node_Str","String_Node_Str" + version.toString() + "String_Node_Str");
    }
  }
  MapResource res=createResource(repoMeta.rel(),entity,repoMeta.entityMetadata(),baseUri);
  URI selfUri=buildUri(baseUri,repository,id);
  res.addLink(new SimpleLink(SELF,selfUri));
  publishEvent(new BeforeRenderResourceEvent(request,repoMeta,res));
  return negotiateResponse(request,HttpStatus.OK,headers,res);
}

Fixed version (ground truth):
/** 
 * Retrieve a specific entity.
 * @param request
 * @param uriBuilder
 * @param repository
 * @param id
 * @return
 * @throws IOException
 */
@SuppressWarnings({"String_Node_Str"}) @RequestMapping(value="String_Node_Str",method=RequestMethod.GET) @ResponseBody public ResponseEntity<?> entity(ServletServerHttpRequest request,UriComponentsBuilder uriBuilder,@PathVariable String repository,@PathVariable String id) throws IOException {
  URI baseUri=uriBuilder.build().toUri();
  RepositoryMetadata repoMeta=repositoryMetadataFor(repository);
  if (!repoMeta.exportsMethod(CrudMethod.FIND_ONE)) {
    return negotiateResponse(request,HttpStatus.METHOD_NOT_ALLOWED,new HttpHeaders(),null);
  }
  Serializable serId=stringToSerializable(id,(Class<? extends Serializable>)repoMeta.entityMetadata().idAttribute().type());
  CrudRepository repo=repoMeta.repository();
  Object entity=repo.findOne(serId);
  if (null == entity) {
    return notFoundResponse(request);
  }
  HttpHeaders headers=new HttpHeaders();
  if (null != repoMeta.entityMetadata().versionAttribute()) {
    Object version=repoMeta.entityMetadata().versionAttribute().get(entity);
    if (null != version) {
      List<String> etags=request.getHeaders().getIfNoneMatch();
      for (      String etag : etags) {
        if (("String_Node_Str" + version.toString() + "String_Node_Str").equals(etag)) {
          return negotiateResponse(request,HttpStatus.NOT_MODIFIED,new HttpHeaders(),null);
        }
      }
      headers.set("String_Node_Str","String_Node_Str" + version.toString() + "String_Node_Str");
    }
  }
  URI selfUri=buildUri(baseUri,repository,id);
  MapResource res=createResource(repoMeta.rel(),entity,repoMeta.entityMetadata(),selfUri);
  res.addLink(new SimpleLink(SELF,selfUri));
  publishEvent(new BeforeRenderResourceEvent(request,repoMeta,res));
  return negotiateResponse(request,HttpStatus.OK,headers,res);
}