[BUG][Java] Java generator does not generate a model class for a schema named 'File'

When an api.yml file contains a type definition called 'File' no model class is generated by the Java/spring generator for that type.

openapi-generator version

4.2.2

Details

The api.yaml file defines a type called File and an endpoint that returns a wrapper object containing a field of this type.

The generator is configured to use the package com.example.rest.model for generated model classes.

Expected behaviour:

• A class with the fully-qualified class name com.example.rest.model.File
  should be generated
• The generated wrapper class com.example.rest.model.FileWrapper should contain
  a field called file of type com.example.rest.model.File

Actual behaviour:

• No model class called com.example.rest.model.File is generated
• The files field of the generated wrapper class is of type java.io.File

Partial workaround:

The second issue (incorrect import type) can be worked around by explicitly adding the import-mapping File=com.example.rest.model.File to the configuration.

However, the class com.example.rest.model.File is still not generated.

Steps to reproduce

To reproduce, extract the attached oas-generator-file-bug.tar.gz file cd into the extracted project dir and run mvn clean generate-sources

Alternatively, the api.yaml file and a pom.xml configured to use the generator maven plugin can be seen here: https://gist.github.com/daiscog/71908355396370a6a4316d0adfeb6d31

Start by extracting the attached project and running mvn clean generate-sources with its api.yaml and pom.xml. Then trace how the Java/Spring generator handles a schema named File, import mappings, and the FileWrapper field. Done means generating com.example.rest.model.File and making the wrapper field use that model rather than java.io.File.