[BUG] Java Maven Openapi generator returns a Null Pointer Exception.

otaviojava commented 4 years ago

Bug Report Checklist

[x] Have you provided a full/minimal spec to reproduce the issue?
[x] Have you validated the input using an OpenAPI validator (example)?
[x] What's the version of OpenAPI Generator used?
[x] Have you search for related issues/PRs?
[ ] What's the actual output vs expected output?
[ ] [Optional] Bounty to sponsor the fix (example)

Description

I did the validation in the YAML file and it passes, however, when I try to generate the code from this YAML file API it returns the error below:

  Exception: null
    at org.openapitools.codegen.DefaultGenerator.processOperation (DefaultGenerator.java:1204)
    at org.openapitools.codegen.DefaultGenerator.processPaths (DefaultGenerator.java:1098)
    at org.openapitools.codegen.DefaultGenerator.generateApis (DefaultGenerator.java:556)
    at org.openapitools.codegen.DefaultGenerator.generate (DefaultGenerator.java:1008)
    at org.openapitools.codegen.plugin.CodeGenMojo.execute (CodeGenMojo.java:746)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
Caused by: java.lang.NullPointerException
    at org.openapitools.codegen.DefaultCodegen.fromRequestBodyToFormParameters (DefaultCodegen.java:5458)
    at org.openapitools.codegen.DefaultCodegen.fromOperation (DefaultCodegen.java:3506)
    at org.openapitools.codegen.languages.AbstractJavaCodegen.fromOperation (AbstractJavaCodegen.java:1226)
    at org.openapitools.codegen.DefaultGenerator.processOperation (DefaultGenerator.java:1172)
    at org.openapitools.codegen.DefaultGenerator.processPaths (DefaultGenerator.java:1098)
    at org.openapitools.codegen.DefaultGenerator.generateApis (DefaultGenerator.java:556)
    at org.openapitools.codegen.DefaultGenerator.generate (DefaultGenerator.java:1008)
    at org.openapitools.codegen.plugin.CodeGenMojo.execute (CodeGenMojo.java:746)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)

openapi-generator version

4.3.1

OpenAPI declaration file content or url

The URL code: https://github.com/platformsh/platformsh-client-java/blob/master/src/main/resources/api.yaml

Command line used for generation

On this project source code: https://github.com/platformsh/platformsh-client-java We run this command:

mvn clean package

Steps to reproduce

git clone git@github.com:platformsh/platformsh-client-java.git
cd platformsh-client-java
mvn clean package

Related issues/PRs

Suggest a fix

shivankpandey2 commented 3 years ago

Any luck on this, getting the same exception on version 5+.

bhushanshinde07 commented 2 years ago

Hi All, Any luck on above issue. I am also facing same issue in openapi-generator.version 5.4.0 but it was working with openapi-generator.version 5.3.0.

Could you please give me resolution steps to resolve the above issue?

otaviojava commented 2 years ago

I worked on version 5.3.0.

OpenAPITools / openapi-generator