[Java] The discriminator is not implicitly set in constructor of base class

For version 2.4.x There is already a solution but only for GSON.

see pull request: https://github.com/swagger-api/swagger-codegen/pull/7075/files/f3c5f57ae37d5c1f382234a7b5778b2ca5ff4371

But this should also be available for version 3.0.5 and also for all java languages.

Proposed solution:
I did the following in my local pojo.mustache file:

{{#discriminator}}
/**
 * Default constructor for implicitly setting the discriminator
 */
 public {{classname}}() {
this.{{discriminator.propertyName}} = this.getClass().getSimpleName();
 }
 {{/discriminator}}

Tests with server models (jackson) and client models (gson) worked as expected.

Start with the Java pojo.mustache template and compare it with the referenced version 2.4.x pull request. Exercise the generated server models with Jackson and client models with Gson, as described in the issue. Done means the discriminator is implicitly set for version 3.0.5 across all Java languages and both model types behave as expected.