问题与hibernate-validator - 5.2.4.Final

Question

我正在使用hibernate-validator - 4.2.0.Final lib for GroupSequenceProvider，它工作正常。

我已将我的应用程序升级到hibernate-validator - 5.2.4.Final并且我得到空指针异常。

我正在关注以下链接：

https://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/?v=5.4#chapter-groups

以下是我的代码：

     public class MyGroupSequenceProvider implements DefaultGroupSequenceProvider<CustomObject> 
   {
     @Override
     public List<Class<?>> getValidationGroups(CustomObject customObject) 
     {
       List<Class<?>> defaultGroupSequence = new ArrayList<Class<?>>();
       defaultGroupSequence.add(CustomObject.class);
       if (customObject.getType().equals("Number") { 
           defaultGroupSequence.add(NumberChecks.class);
       }
       else if (customObject.getType().equals("String")) {
         defaultGroupSequence.add(StringChecks.class);
       }
       return defaultGroupSequence;
     }
  }

此外，

下面是我的模型类：

  @AllArgsConstructor
  @Getter
  @GroupSequenceProvider(MyGroupSequenceProvider.class)
  public class CustomObject {

  @NotNull
  private String type;

  @Length(min = 2, max = 4,groups = NumberChecks.class)
  @Length(min = 2, max = 7, groups = StringChecks.class)
  private String value;
}

由于