java - Jersey /JAX-RS : How to cascade beans-validation recursively with @Valid automatically?

Question

我正在 Jersey 的 REST 资源端点中验证我的 POJO:

public class Resource {
    @POST
    public Response post(@NotNull @Valid final POJO pojo) {
        ...
    }
}

public class POJO {
    @NotNull
    protected final String name;

    @NotNull
    @Valid
    protected final POJOInner inner;

    ...
}

public class POJOInner {
    @Min(0)
    protected final int limit;

    ...
}

这似乎工作正常。

但是，@Min(0) 注释只有在 inner 字段具有 @Valid 注释时才会被验证。将 @Valid 注释添加到每个不是原语的字段中感觉不对。

有没有办法告诉 bean validator 自动递归地继续验证，即使没有 @Valid 注释存在？我希望我的 POJO 如下:

public class POJO {
    @NotNull
    protected final String name;

    @NotNull
    protected final POJOInner inner;

    ...
}

Answer 1

实际上，根据规范，添加@Valid 正是针对此用例的。来自 JSR 303 规范:

In addition to supporting instance validation, validation of graphs of object is also supported. The result of a graph validation is returned as a unified set of constraint violations. Consider the situation where bean X contains a field of type Y. By annotating field Y with the @Valid annotation, the Validator will validate Y (and its properties) when X is validated.

...

The @Valid annotation is applied recursively