File upload with a path parameter doesn't invoke the controller method.

[genealogy-cz]

The OpeAPI spec (3.0.2) declares an endpoint with a required parameter and a file upload in the request body. The assigned controller method is never invoked by swagger-inflector (2.0.0) as the expected call params aren't matched.

paths:
  /test/{testId}/content:
    parameters:
      - name: testId
        in: path          
        required: true
        schema:
          type: string
          format: uuid
      
    post:
      x-swagger-router-controller: org.test.TestController
      operationId: uploadTest
      
      requestBody:
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                fileData:
                  type: string
                  format: binary
                  
      responses:
        '200':
          description: OK, success.

package org.test;

import java.io.File;
import java.util.UUID;

import javax.ws.rs.core.Response.Status;

import io.swagger.oas.inflector.models.RequestContext;
import io.swagger.oas.inflector.models.ResponseContext;

public class TestController  {
  
  public ResponseContext uploadTest(RequestContext request , UUID testId, File fileData) {
      return new ResponseContext().status(Status.INTERNAL_SERVER_ERROR).entity( "Not implemented" );
  }
}

The POST call is done with curl:

curl -F "fileData=@test.txt" "http://localhost:8080/api/test/123e4567-e89b-12d3-a456-426655440002/content"

The error is:

java.lang.IllegalArgumentException: argument type mismatch

To reproduce, set a breakpoint in TestController#uploadTest(), and it is never hit in the debugger.

The reason seems to be in io.swagger.oas.inflector.controllers.OpenAPIOperationController.java lines 354-356: the element at index 2 of the original args[3] should be set with the returned argument (the file object), but instead the whole half-populated args[] gets replaced with args2[] that assumes, that the returned file object is always at index 1, which is not correct when the path contains parameters.

[frantuma]

Thanks for reporting this! fixed in #328