CODEWITHSUNDEEP
javaspringjacksonspring-boot
Jonas Geiregat
Jonas Geiregat

Reputation: 5432

Jackson2ObjectMapperBuilder enable field visibility ANY

I'm using spring-boot and want to customize the ObjectMapper created.

What I want to do is be able to serialize objects that do not have a getter or setters. Before this could be done by putting JsonAutoDetect.Visibility.ANY on the ObjectMapper.

But how can I enable this feature using the Jackson2ObjectMapperBuilder bean I'm currently exposing ?

Upvotes: 7

Views: 11154

Answers (3)

Grigory Kislin
Grigory Kislin

Reputation: 18010

I spend a half of day to play with different settings. So I manage to work it (1.3.2.RELEASE) when:

  • I configure jackson in simple @Configuration annotated config class (not extended from WebMvcConfigurerAdapter)
  • I have NOT@EnableWebMvc

Then Jackson2ObjectMapperBuilder objectMapperBuilder solution is work, but spring.jackson.serialization.indent_output: true in properties ignored.

At last I finished with

 @Autowired(required = true)
 public void configeJackson(ObjectMapper objectMapper) {
     objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE)
            .setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
 }

But all this is puzzle for me. I wrote a question about any explanation of all this magic in order to have some undestanding and solve problem not by trial-and-error method: Are there any Spring Boot documentation for understanding how web mvc configuration is work?

Upvotes: 1

Rodrigo Quesada
Rodrigo Quesada

Reputation: 1470

If you want to keep the ObjectMapper configurable through the spring.jackson.* properties that Spring Boot provides, then you better don't define your own Jackson2ObjectMapperBuilder bean (check JacksonObjectMapperBuilderConfiguration inside JacksonAutoConfiguration class for details).

What you can do instead is this:

@Bean
public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder mapperBuilder) {
    return mapperBuilder.build().setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
}

Upvotes: 8

Andy Wilkinson
Andy Wilkinson

Reputation: 116091

You can use a Jackson2ObjectMapperBuilder subclass that overrides the configure(ObjectMapper) method:

@Bean
public Jackson2ObjectMapperBuilder objectMapperBuilder() {
    return new Jackson2ObjectMapperBuilder() {

        @Override
        public void configure(ObjectMapper objectMapper) {
            super.configure(objectMapper);
            objectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
        }

    };

}

Upvotes: 9

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