NPE caused by post block with array of strings

[inthegarage]

Description

A post section, with the the following section:

      parameters:
        - in: body
          name: body
          description: The list
          required: true
          schema:
            type: array
            items:
              type: string

causes an NPE.

Swagger-codegen version

2.2.3

Swagger declaration file content or url

  /my/endpoint:
    post:
      description: Returns a list
      operationId: getMyList
      parameters:
        - in: body
          name: body
          description: The list to retrieve as csv
          required: true
          schema:
            type: array
            items:
              type: string
      produces:
        - text/csv
      responses:
        '200':
          description: Ok
          schema: {
            type: string
          }
        '404':
          description: file not found
          schema:
            $ref: '#/definitions/errorModel'
        default:
          description: unexpected error
          schema:
            $ref: '#/definitions/errorModel'

  errorModel:
    type: object
    required:
      - code
      - message
    properties:
      code:
        type: integer
        format: int32
      message:
        type: string

Command line used for generation

mvn clean compile

Steps to reproduce

Place the code into the defintion into a swagger file and compile it with the maven generator. It is not important which language variant you use the two I tried failed. (typescript and spring)

The error is:

Exception: null
at io.swagger.codegen.DefaultGenerator.processOperation(DefaultGenerator.java:861)
at io.swagger.codegen.DefaultGenerator.processPaths(DefaultGenerator.java:764)
at io.swagger.codegen.DefaultGenerator.generateApis(DefaultGenerator.java:388)
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:700)
at io.swagger.codegen.plugin.CodeGenMojo.execute(CodeGenMojo.java:534)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: java.lang.NullPointerException
at io.swagger.codegen.languages.AbstractJavaCodegen.needToImport(AbstractJavaCodegen.java:942)
at io.swagger.codegen.DefaultCodegen.fromOperation(DefaultCodegen.java:2240)
at io.swagger.codegen.languages.AbstractJavaCodegen.fromOperation(AbstractJavaCodegen.java:1004)
at io.swagger.codegen.DefaultGenerator.processOperation(DefaultGenerator.java:808)

Your help is appreciated.

[wing328]

@inthegarage can you try the latest master (2.3.0)? SNAPSHOT version can be found in the README

[inthegarage]

@wing328 I can confirm this is fixed in Master. Good work.

[inthegarage]

Should I close or is it best you do so with a version reference?

[wing328]

@inthegarage thanks for confirming the issue has been addressed in the latest master. I just closed it.