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From "Markus Karg (Jira)" <j...@apache.org>
Subject [jira] [Created] (JOHNZON-276) StackOverflowError in DefaultPropertyVisibilityStrategy
Date Wed, 18 Sep 2019 07:05:00 GMT
Markus Karg created JOHNZON-276:
-----------------------------------

             Summary: StackOverflowError in DefaultPropertyVisibilityStrategy
                 Key: JOHNZON-276
                 URL: https://issues.apache.org/jira/browse/JOHNZON-276
             Project: Johnzon
          Issue Type: Bug
          Components: JSON-B
    Affects Versions: 1.2.1
            Reporter: Markus Karg


The following code produces a StackOverflowError:

@JsonVisibility(DefaultPropertyVisibilityStrategy.class)

public final class C {

  @JsonProperty private boolean foo;

}

The problem is caused by the fact that this strategy tries to compare "this" by "==" with
a _new instance_ of itself, which certainly fails, because the new copy is definitively a
different reference than the one currently executed and instantiated due to the class annotation.

The fix is simple: Adding an equals method just comparing the class type (as the strategy
has no members other than a cache), and calling that instead of "==".



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