[jaxrs-cxf-client] incorrect List of Lists return type in Api

Description

I have a swagger.json file with a response schema of string[].
I'm expecting this to produce a method return type of List of String.
Instead I'm seeing List of List of String

Swagger-codegen version

2.2.2

Swagger declaration file content or url

"/v1/comments/categories" : {
     "get" : {
       "tags" : [ "comments" ],
       "summary" : "Returns all comment categories.",
       "description" : "",
       "operationId" : "getCategories_1",
       "parameters" : [ ],
       "responses" : {
         "200" : {
           "description" : "successful operation",
           "schema" : {
             "type" : "array",
             "items" : {
               "type" : "string"
             }
           }
         }
       }
     }
   }

Produces

@Api(value = "/", description = "")
public interface CommentsApi  {

    @GET
    @Path("/v1/comments/categories")
    @ApiOperation(value = "Returns all comment categories.", tags={  })
    public List<List<String>> getCategories1();
...

expected:

@Path("/")
@Api(value = "/", description = "")
public interface CommentsApi  {

    @GET
    @Path("/v1/comments/categories")
    @ApiOperation(value = "Returns all comment categories.", tags={  })
    public List<String> getCategories1();
...

Command line used for generation

Maven.

    <plugins>
      <plugin>
        <groupId>io.swagger</groupId>
        <artifactId>swagger-codegen-maven-plugin</artifactId>
        <version>2.2.2</version>
        <executions>
          <execution>
            <goals>
              <goal>generate</goal>
            </goals>
            <configuration>
              <inputSpec>swagger.json</inputSpec>

              <language>jaxrs-cxf-client</language>

              <configOptions>
                <dateLibrary>joda</dateLibrary>
              </configOptions>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

Steps to reproduce

Run maven against the above json.

Related issues

Searched, but nothing jumped out at me. I'm not really familiar with the project though.

Suggest a Fix

Unsure... Will poke a bit at it.

Start with the jaxrs-cxf-client generator and reproduce the issue by running Maven against the provided swagger.json response schema. Compare the generated CommentsApi getCategories1 return type with the expected List; done means the array-of-string schema no longer produces List<List>.