[jira] [Closed] (GROOVY-4320) Joint compiler + @Delegate fail to recognize method signature with default value

["Paul King (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-4320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul King closed GROOVY-4320.
-----------------------------

> Joint compiler + @Delegate fail to recognize method signature with default value
> --------------------------------------------------------------------------------
>
>                 Key: GROOVY-4320
>                 URL: https://issues.apache.org/jira/browse/GROOVY-4320
>             Project: Groovy
>          Issue Type: Bug
>          Components: Compiler
>    Affects Versions: 1.7.4
>         Environment: MacOSX Snow Leopard, Groovy 1.7.4, Java 1.6.0_17
>            Reporter: Andres Almiray
>            Assignee: Eric Milles
>            Priority: Major
>             Fix For: 4.0.0-beta-1
>
>         Attachments: GROOVY-4320.patch
>
>
> Spotted this problem when upgrading Griffon to Groovy 1.7.4.
> Start with a base contract defined in java
> {code}
> import java.util.List;
> public interface IApp {
>     void event(String name);
>     void event(String name, List params);
> }
> {code}
> Implement said contract in Groovy
> {code}
> class BaseApp implements IApp {
>     private IApp appDelegate
>     BaseApp(IApp app) {
>         this.appDelegate = app
>     }
>     void event(String name, List params = []) {
>         // empty
>     }
> }
> {code}
> Now create a Groovy class where the previous will be used as delegate
> {code}
> class RealApp {
>     @Delegate BaseApp _base
>     RealApp() {
>         _base = new BaseApp(this)
>     }
> }
> {code}
> Compile the code
> {code}
> groovyc IApp.java BaseApp.groovy RealApp.groovy
> {code}
> With Groovy 1.7.3 you get the following method signatures
> {code}
> $ javap BaseApp | grep event
>     public void event(java.lang.String, java.util.List);
>     public void event(java.lang.String);
> $ javap RealApp | grep event
>     public void event(java.lang.String);
>     public void event(java.lang.String, java.util.List);
> {code}
> However 1.7.4 fails to recognize that the second argument to event() has a default value
> {code}
> $ groovy -version
> Groovy Version: 1.7.4 JVM: 1.6.0_17
> $ groovyc IApp.java BaseApp.groovy RealApp.groovy 
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> RealApp.groovy: 1: Can't have an abstract method in a non-abstract class. The class 'RealApp' must be declared abstract or the method 'void event(java.lang.String)' must be implemented.
>  @ line 1, column 1.
>    class RealApp {
>    ^
> 1 error
> {code}



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