Access the introspector

[jobayle]

Dears,
I would like to know how to port to Jackson 3 the following use case:

https://docs.hibernate.org/stable/validator/reference/en-US/html_single/#section-property-node-name-provider

The goal is to access JSON property names to properly format error messages.

In Jackson 2 the solution was to call the introspector:

    JavaType type = objectMapper.constructType( property.getDeclaringClass() );
    BeanDescription desc = objectMapper.getSerializationConfig().introspect( type );

    return desc.findProperties()
        .stream()
        .filter( prop -> prop.getInternalName().equals( property.getName() ) )
        .map( BeanPropertyDefinition::getName )
        .findFirst()
        .orElse( property.getName() );

Thanks

[pjfanning]

mapper.serializationConfig() is available in Jackson 3 but it looks like the introspect method is not public any more

[pjfanning]

SerializationContext has an intropectBeanDescription method and SerializationContext is kind of accessible from ObjectMapper but the method is commented as being only accessible for testing purposes.

https://javadoc.io/static/tools.jackson.core/jackson-databind/3.0.2/tools.jackson.databind/tools/jackson/databind/ObjectMapper.html#_serializationContext()

[cowtowncoder]

Right; internal property introspection Jackson (de)serializers use is not meant/designed to be accessible outside of serialization/deserialization context, although in practice in 2.x it was left more exposed.

External introspection is meant to be exposed instead via ObjectMapper.acceptJsonFormatVisitor() which is designed as public API, and should reflect serialization side handling.
So I would recommend trying that route if at all possible.