CSharp client generation fails but PHP and Java works for the the json schema

[nimisha84]

Description

I am using the attached json file for run the swagger codegen for getting the SDK in CSharp.
However I get this error everytime-
C:\Users\DevAdmin\Documents>java -jar swagger-codegen-cli-2.2.1.jar generate -i
V4schema.json -l csharp
[main] INFO io.swagger.parser.Swagger20Parser - reading from V4schema.json
[main] INFO io.swagger.codegen.languages.CSharpClientCodegen - Generating code f
or .NET Framework v4.5
Exception in thread "main" java.lang.RuntimeException: Could not process model '
access/CompanyAccess'.Please make sure that your schema is correct!
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:29
7)
at io.swagger.codegen.cmd.Generate.run(Generate.java:223)
at io.swagger.codegen.SwaggerCodegen.main(SwaggerCodegen.java:36)
Caused by: java.lang.NullPointerException
at io.swagger.codegen.languages.AbstractCSharpCodegen.getSwaggerType(Abs
tractCSharpCodegen.java:509)
at io.swagger.codegen.DefaultCodegen.getTypeDeclaration(DefaultCodegen.j
ava:1119)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration
(AbstractCSharpCodegen.java:532)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration
(AbstractCSharpCodegen.java:525)
at io.swagger.codegen.DefaultCodegen.fromProperty(DefaultCodegen.java:15
72)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:2738)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:2709)
at io.swagger.codegen.DefaultCodegen.fromModel(DefaultCodegen.java:1270)

    at io.swagger.codegen.languages.CSharpClientCodegen.fromModel(CSharpClie

ntCodegen.java:313)
at io.swagger.codegen.DefaultGenerator.processModels(DefaultGenerator.ja
va:875)
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:29
0)
... 2 more

If the schema was not correct it should have failed for PHP and Java as well. Can you help me figure out the issue?

Swagger-codegen version

Latest version- 2.2.1

Swagger declaration file content or url

Added in the gist here-https://gist.github.com/nimisha84/6f7af0e607eb6aa2a764a095d6424ec2

Command line used for generation

java -jar swagger-codegen-cli-2.2.1.jar generate -i V4schema.json -l csharp

Steps to reproduce

Run the cmd above in either mac or windows. I tried both.

[wing328]

The latest version if 2.2.3. Please give it a try: https://github.com/swagger-api/swagger-codegen#compatibility

or you can use the latest master (snapshot version), which has a few API clients refactored (e.g. C#, PHP, etc)

[nimisha84]

Unfortunately I got the same error with latest master snapshot version-

C:\Users\DevAdmin\Documents>java -jar swagger-codegen-cli-2.3.0-20170906.155839-
135.jar generate -i V4schema.json -l csharp
[main] INFO io.swagger.parser.Swagger20Parser - reading from V4schema.json
[main] INFO io.swagger.codegen.languages.CSharpClientCodegen - Generating code f
or .NET Framework v4.5
Exception in thread "main" java.lang.RuntimeException: Could not process model '
access/CompanyAccess'.Please make sure that your schema is correct!
at io.swagger.codegen.DefaultGenerator.generateModels(DefaultGenerator.j
ava:358)
at io.swagger.codegen.DefaultGenerator.generate(DefaultGenerator.java:72
7)
at io.swagger.codegen.cmd.Generate.run(Generate.java:285)
at io.swagger.codegen.SwaggerCodegen.main(SwaggerCodegen.java:35)
Caused by: java.lang.NullPointerException
at io.swagger.codegen.languages.AbstractCSharpCodegen.getSwaggerType(Abs
tractCSharpCodegen.java:556)
at io.swagger.codegen.DefaultCodegen.getTypeDeclaration(DefaultCodegen.j
ava:1221)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration
(AbstractCSharpCodegen.java:579)
at io.swagger.codegen.languages.AbstractCSharpCodegen.getTypeDeclaration
(AbstractCSharpCodegen.java:572)
at io.swagger.codegen.DefaultCodegen.fromProperty(DefaultCodegen.java:17
94)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:3116)
at io.swagger.codegen.DefaultCodegen.addVars(DefaultCodegen.java:3087)
at io.swagger.codegen.DefaultCodegen.fromModel(DefaultCodegen.java:1442)

    at io.swagger.codegen.languages.CSharpClientCodegen.fromModel(CSharpClie

ntCodegen.java:446)
at io.swagger.codegen.DefaultGenerator.processModels(DefaultGenerator.ja
va:995)
at io.swagger.codegen.DefaultGenerator.generateModels(DefaultGenerator.j
ava:353)
... 3 more

[wing328]

@nimisha84 I've fixed the NPE issue via #6462. Please pull the latest master to give it a try.

[nimisha84]

Thanks it worked!

[wing328]

FYI. I also reviewed other generators and found only ObjC client generator had similar issue, which has been fixed by #6465