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Date: Wed, 8 Feb 2017 15:43:42 +0000 (UTC)
From: =?utf-8?Q?Peter_Myr=C3=A9n_=28JIRA=29?= <jira@apache.org>
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Message-ID: <JIRA.12818437.1348806203000.29792.1486568622693@Atlassian.JIRA>
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Subject: [jira] [Comment Edited] (GROOVY-5728) Accessing private constructor
 from a static factory
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archived-at: Wed, 08 Feb 2017 15:43:48 -0000


    [ https://issues.apache.org/jira/browse/GROOVY-5728?page=3Dcom.atlassia=
n.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D158=
57927#comment-15857927 ]=20

Peter Myr=C3=A9n edited comment on GROOVY-5728 at 2/8/17 3:43 PM:
-------------------------------------------------------------

Same problem with static nested class.
{code}
public abstract class FooMain {
    private FooMain() {}
    public abstract String bar();
    public static FooMain factory() {
      return new FooMainNested();
    }
    public static void main(String[] args) {
        System.out.println(factory().bar());
    }
   =20
   private static class FooMainNested extends FooMain{
        public String bar() { return "xxx"; }
   }
}

{code}
This is expected, since nested static classes can't access private variable=
s and methods. But, this also fails:
{code}
public class FooMain {

    private FooMain() {}

    public String bar(){return null;}

    public static FooMain factory() {
        return new FooMainNested(new FooMain());
    };

    public static void main(String[] args) {
        System.out.println(factory().bar());
    }

    private class FooMainNested extends FooMain{

        @Override
        public String bar() {
            return "xxx";
        }
    }

}
{code}

It woks with protected constructor though.
{code}
public abstract class FooMain {
    protected FooMain() {}
    public abstract String bar();
    public static FooMain factory() {
      return new FooMain() {
        public String bar() { return "xxx"; }
      };
    }   =20
    public static void main(String[] args) {
        System.out.println(factory().bar());
    }  =20
}
{code}

Tested with groovy 2.4.8


was (Author: petermyren):
Same problem with static nested class.
{code}
public abstract class FooMain {
    private FooMain() {}
    public abstract String bar();
    public static FooMain factory() {
      return new FooMainNested();
    }
    public static void main(String[] args) {
        System.out.println(factory().bar());
    }
   =20
   private static class FooMainNested extends FooMain{
        public String bar() { return "xxx"; }
   }
}

{code}

It woks with protected constructor though.
{code}
public abstract class FooMain {
    protected FooMain() {}
    public abstract String bar();
    public static FooMain factory() {
      return new FooMain() {
        public String bar() { return "xxx"; }
      };
    }   =20
    public static void main(String[] args) {
        System.out.println(factory().bar());
    }  =20
}
{code}

Tested with groovy 2.4.8

> Accessing private constructor from a static factory
> ---------------------------------------------------
>
>                 Key: GROOVY-5728
>                 URL: https://issues.apache.org/jira/browse/GROOVY-5728
>             Project: Groovy
>          Issue Type: Bug
>          Components: groovy-runtime
>    Affects Versions: 2.0.4, 2.4.0-beta-3
>            Reporter: Paul King
>            Priority: Minor
>
> The following code works fine from Java but fails in Groovy:
> {code}
> public abstract class FooMain {
>     private FooMain() {}
>     public abstract String bar();
>     public static FooMain factory() {
>       return new FooMain() {
>         public String bar() { return "xxx"; }
>       };
>     }
>     public static void main(String[] args) {
>         System.out.println(factory().bar());
>     }
> }
> // =3D> java.lang.IllegalAccessError: tried to access method FooMain.<ini=
t>()V from class FooMain$1
> {code}


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