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https://issues.apache.org/jira/browse/JOHNZON-223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16891728#comment-16891728
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Kevin commented on JOHNZON-223:
-------------------------------
Works fine, thank you!
> Deserialization of objects with generic types leads to an error
> ---------------------------------------------------------------
>
> Key: JOHNZON-223
> URL: https://issues.apache.org/jira/browse/JOHNZON-223
> Project: Johnzon
> Issue Type: Bug
> Components: JSON-B
> Affects Versions: 1.1.12
> Reporter: Kevin
> Assignee: Romain Manni-Bucau
> Priority: Major
> Fix For: 1.1.13
>
> Attachments: error.log
>
>
> In our project we use generic containers e.g. for enums to enrich them with
> additional information. For the serialization in Json we use an own adapter.
> Serialization in Json works without problems, but deserialization into an
> object results in an error:
> {code:java}
> javax.json.bind.JsonbException: Cannot cast
> sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl to
> java.lang.Class{code}
> From my point of view the problem lies in the method
> {code:java}
> org.apache.johnzon.mapper.Mappings.findConverter line 570
> final ParameterizedType type =
> ParameterizedType.class.cast(decoratedType.getType());
> final Type rawType = type.getRawType();
> if (Class.class.isInstance(rawType)
> && Collection.class.isAssignableFrom(Class.class.cast(rawType))
> && type.getActualTypeArguments().length >= 1) {
> typeToTest = type.getActualTypeArguments()[0];
> } // TODO: map{code}
> The condition checks here whether it is a collection, otherwise nothing else
> is done for ParameterizedTypes.
> However, the variable typeToTest should be set to rawType for
> ParameterizedTypes so that a converter can be found afterwards. Otherwise
> typeToTest remains a ParameterizedType and the query in line 576 if
> (converter == null && Class.class.isInstance(typeToTest)) fails and no
> converter will be searched.
>
> A small test can be found here:
> [https://gist.github.com/kevinwilken/12da681534053b776247697c6f24c296]
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