Generic type parameters not resolved properly

[Mobe91]

Given to following class hierarchy:

public interface IdView<T extends Serializable> {
    T getId();
}

public interface Entity1IdView extends IdView<UUID> {
}

public abstract class Entity1View implements Entity1IdView {
  private String name;

  public String getName() { return name; }
}

Yields the following typescript definitions:

export interface Serializable {
}
export interface Entity1IdView extends IdView<string> {
}
export class Entity1View implements Entity1IdView {
    id: T;
    name: string;
}

Apparently, the type parameter T is not resolved correctly for the declaration of the id field in Entity1View.

[olegshtch]

cz.habarta.typescript.generator.compiler.ModelCompiler.getTypeParameters ignores bounds. But it possible to have unknown class here, so it should use data from Model, which discovers new classes.

[olegshtch]

@Mobe91 Could you try #389 ?

[vojtechhabarta]

@olegshtch I tried #389 with mentioned example, here is the generated output:

export class Entity1View implements Entity1IdView {
    id: T;  // needs to be resolved
    name: string;
}
export interface Entity1IdView extends IdView<string> {
}
export interface IdView<T extends Serializable> {  // added generic bound
    id: T;
}
export interface Serializable {
}

I think it is needed to resolve generic variable T in Entity1View to string. Resolve generic variables is relatively complex in general case. I am thinking whether to use some library for it or implement it in typescript-generator.

This would be also useful for #219.

[olegshtch]

It's strange but after rebase #389 on top master I get

interface Entity1View extends Entity1IdView {
    name: string;
}
interface Entity1IdView extends IdView<string> {
}
interface IdView<T extends string> {
    id: T;
}

from:

    public interface IdView<T extends String> {
        T getId();
    }

    public interface Entity1IdView extends IdView<String> {
    }

    public abstract class Entity1View implements Entity1IdView {
        private String name;

        public String getName() { return name; }
    }

It looks correct.

[olegshtch]

Looks like somehow it should generate class instead of interface to reproduce bug.

[vojtechhabarta]

Fix released in version 2.17.558.