[Java/GSON] Fix error with enums of integer type #7059
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PR checklist
./bin/
to update Petstore sample so that CIs can verify the change. (For instance, only need to run./bin/{LANG}-petstore.sh
and./bin/security/{LANG}-petstore.sh
if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in.\bin\windows\
.3.0.0
branch for changes related to OpenAPI spec 3.0. Default:master
.Description of the PR
This is the second attempt to fix issue #6806 . The first attempt (PR #7051) introduced a new variable to
CodegenModel.java
which was rather ugly. The present fix uses an entirely different approach by rewriting the GSON adapter for enums, i.e. only two mustache templates have to be changed.I have tested the generated code with enums of type string and integer and it worked in both cases. This solution essentially relies on special behavior of com.google.gson.stream.JsonReader#nextString().