Union array type in interfaces generated wrong

[hlege]

Issue Description

Union array types in interfaces now generate the exact type e.g.: List<UnionType>, but it should be List<? extends UnionType>

Steps to Reproduce

union FooOrBar = Foo | Bar

type Foo {
  id: ID!
}

type Bar {
  id: ID!
}

interface ResultObject {
  list: [FooOrBar!]
}

type MyFooResult implements ResultObject {
  list: [Foo!]
}

type MyBarResult implements ResultObject {
  list: [Bar!]
}

Expected Result

The code should compile.

public interface ResultObject {

    java.util.List<? extends FooOrBar> getList();

}

Actual Result

public interface ResultObject {

    java.util.List<FooOrBar> getList();

}

io.github.kobylynskyi.bikeshop.graphql.model.MyFooResult is not abstract and does not override abstract method getList() in io.github.kobylynskyi.bikeshop.graphql.model.ResultObject

Your Environment and Setup

• graphql-java-codegen version: 5.5.0
• Build tool: E.g.: Maven

[kobylynskyi]

@hlege sorry for a long response. Here's the PR which addresses your issue: #1030

[kobylynskyi]

Will include the fix in the next upcoming release