Use grails.converters.JSON instead of gson in JsonMapType ?

[ph4t]

Hi,

In our application we are using builtin JSON class to marshall/umarshall domain classes etc. We have a lot of custom object marshallers and we are using a few plugins that integrate with Grails JSON class (https://github.com/pedjak/grails-marshallers & https://github.com/gpc/joda-time)

I would assume that most people are using the builtin JSON class as well. So, it makes more sense if JsonMapType is using class JSON instead of gson.
What is the reasoning behind using gson? Are there any issues with builtin JSON?

[ilopmar]

Hi @ph4t.

I don't remember why we chose Gson instead of grails.converters.JSON. Maybe we had some problems with the Grails converters, but I can't remember at this moment.

Are you using Grails 2 or Grails 3? I could do some tests with the Grails converter to see what happen. Or maybe you can try to change it and submit a PR.

[ph4t]

I'm using Grails 2.0. We won't migrate to grails 3 anytime soon.

I'll try it and submit PR

[ilopmar]

If you're still using Hibernate 3 you should branch from this: https://github.com/kaleidos/grails-postgresql-extensions/tree/3.x

Please take notice that we currently are not planning to add new functionality to Hibernate 3 support (old versions of Grails). If you need new features you should think about moving to Hibernate 4 (still with Grails 2.x) and use the branch https://github.com/kaleidos/grails-postgresql-extensions/tree/grails-2.x

[ph4t]

We are on hibernate 4. Thanks for letting me know which branch to use...

[kyledobitz]

Related to this, when I include the plugin with a brand new grails 3.3 project that utilizes JsonMapType it fails to start with error:
java.lang.NoClassDefFoundError: Lcom/google/gson/Gson;

Seems to be referenced/imported here:

grails-postgresql-extensions/src/main/groovy/net/kaleidos/hibernate/usertype/JsonMapType.groovy

Line 3 in 0dd0f17

import com.google.gson.Gson

But not included in build.gradle as a dependency