[Jax-rs-resteasy-eap] Improvement, add an option to not generate the RestApplication class

Description

Hi,
I have to insert a rest server (generated by swagger, jax-rs-resteasy-eap configuration) in an environment where other jax-rs rests already exist, with a servlet mapping defined in a web.xml file. The RestApplication class (extends javax.ws.rs.core.Application), auto generated by swagger, creates malfunctions in that it doesn't allow the loading of all the RESTs not specified in that class.

Swagger-codegen version

we are using SwaggerHub with openApi 3.0.0 to design our RESTApi.

Suggest a fix/enhancement

To avoid always having to manually remove the RestApplication class, is it possible to insert in the code generator an option to exclude that class from the generated code?

To do this it would be enough to add a boolean that establishes whether the statement on line 102 of the class JavaResteasyEapServerCodegen.java (available at url: github.com/swagger-api/swagger-codegen/blob/master/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyEapServerCodegen.java)
is executed.

For example:
if(generateRestApplicationClass){
writeOptional(outputFolder, new SupportingFile("jboss-web.mustache", ("src/main/webapp/WEB-INF"), "jboss-web.xml"));
}

Thanks in advance, Alessandro

Start in modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaResteasyEapServerCodegen.java and inspect the generation around the referenced line 102. Check how supporting files are selected, then verify generated output with the option enabled and disabled; done means the RestApplication class is omitted when requested without affecting the default output.