#vulnerable code 
                                private Map<String, List<Method>> collectApisByRequestMapping(List<Method> methods) {
        Map<String, List<Method>> apiMethodMap = new HashMap<String, List<Method>>();
        for (Method method : methods) {
            if (method.isAnnotationPresent(RequestMapping.class)) {
                RequestMapping requestMapping = Annotations.get(method, RequestMapping.class);
                String path = "";
                if (requestMapping.value() != null && requestMapping.value().length != 0) {
                    path = generateFullPath(requestMapping.value()[0]);
                } else {
                    path = resourcePath;
                }
                if (apiMethodMap.containsKey(path)) {
                    apiMethodMap.get(path).add(method);
                } else {
                    List<Method> ms = new ArrayList<Method>();
                    ms.add(method);
                    apiMethodMap.put(path, ms);
                }
            }
        }

        return apiMethodMap;
    } 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private Map<String, List<Method>> collectApisByRequestMapping(List<Method> methods) {
        Map<String, List<Method>> apiMethodMap = new HashMap<String, List<Method>>();
        for (Method method : methods) {
            if (method.isAnnotationPresent(RequestMapping.class)) {
                RequestMapping requestMapping = AnnotationUtils.findAnnotation(method, RequestMapping.class);
                String path = "";
                if (requestMapping.value() != null && requestMapping.value().length != 0) {
                    path = generateFullPath(requestMapping.value()[0]);
                } else {
                    path = resourcePath;
                }
                if (apiMethodMap.containsKey(path)) {
                    apiMethodMap.get(path).add(method);
                } else {
                    List<Method> ms = new ArrayList<Method>();
                    ms.add(method);
                    apiMethodMap.put(path, ms);
                }
            }
        }

        return apiMethodMap;
    }