#vulnerable code 
                                public void addInterceptorsToEntityMetas(List<Interceptor<?>> interceptors, Map<Class<?>,
            EntityMeta> entityMetaMap) {
        for (Interceptor<?> interceptor : interceptors) {
            Class<?> entityClass = propertyParser.inferEntityClassFromInterceptor(interceptor);
            EntityMeta entityMeta = entityMetaMap.get(entityClass);
            Validator.validateBeanMappingTrue(entityMeta != null, "The entity class '%s' is not found",
                    entityClass.getCanonicalName());
            entityMeta.forInterception().addInterceptor(interceptor);
        }
    } 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public void addInterceptorsToEntityMetas(List<Interceptor<?>> interceptors, Map<Class<?>,
            EntityMeta> entityMetaMap) {
        for (Interceptor<?> interceptor : interceptors) {
            Class<?> parentEntityClass = propertyParser.inferEntityClassFromInterceptor(interceptor);

            final Set<Class<?>> candidateEntityClasses = from(entityMetaMap.keySet())
                    .filter(new ChildClassOf(parentEntityClass))
                    .toSet();
            for (Class<?> candidateEntityClass : candidateEntityClasses) {
                final EntityMeta entityMeta = entityMetaMap.get(candidateEntityClass);
                Validator.validateBeanMappingTrue(entityMeta != null, "The entity class '%s' is not found",
                        parentEntityClass.getCanonicalName());
                entityMeta.forInterception().addInterceptor(interceptor);
            }
        }
    }