"hierarchy of the type is inconsistent" from Eclipse trying to extend JacksonJsonProvider

[t...@quarendon.net]

I'm trying to subclass JacksonJsonProvider, but I'm getting "The hierarchy of the type MyJacksonJsonProvider is inconsistent" out of eclipse. This normally means (I think) that something is missing from my classpath, but I can't figure out what.

I have a simple maven eclipse project. I have added a dependency on jackson-jaxrs-json-provider, 2.8.1. I have a simple class:

    import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;

    public class MyJacksonJsonProvider extends JacksonJsonProvider {

    }

However, I get this error. 

Naively, I assumed that maven would ensure that all the required dependencies were in place in my classpath?

It has added:

    jaxrs-json-provider

    jaxrs-base

    core

    databind

    annotations

    module-jaxb-annotations

all at version 2.8.1

Any suggestions on what extra I might need in my classpath, or indeed what else the issue is?

Thanks.

[t...@quarendon.net]

Ah. Accidentally solved my own problem.

javax.ws.rs-api

was missing.

Feels like a missing maven dependency at some level?

[Tatu Saloranta]

That is bit tricky... not sure if this is is Eclipse's fault or not. Root cause is due to dependency inclusion being:

    <dependency>
      <groupId>javax.ws.rs</groupId>
      <!-- 05-Apr-2014, tatu: JAX-RS 2.x has different artifact-id, "javax.ws.rs-api"
        -->
      <artifactId>javax.ws.rs-api</artifactId>
      <version>2.0.1</version>
      <scope>provided</scope>
    </dependency>

in pom.xml. This should be sufficient for compilation and I haven't had any isses with Eclipse.

When building a running system, JAX-RS container should provide these classes. Using different scoping could potentially lead to duplication of API jars which may or may not be harmful.
Why this is not the case with Eclipse in your case I don't know.

-+ Tatu +-

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