Re: Unexpected invocation of getter method with Groovy 4

 for future seekers : https://issues.apache.org/jira/browse/GROOVY-11211

On Sat, 28 Oct 2023 at 10:10, Paolo Di Tommaso <[email protected]>
wrote:

> Dear community,
>
> After switching to Groovy 4, I've observed an expected invocation of the
> Map get method while resolving a closure delegate context.
>
> Consider the following custom Map object in which both `get` and
> `invokeMethod` methods are overridden:
>
> class Context implements Map<String,Object> {
>
>     @Delegate private Map<String,Object> target
>
>     Context(Map<String,Object> target) { this.target = target }
>
>     @Override
>     Object get(Object name) {
>         if( target.containsKey(name) )
>             return target.get(name)
>         throw new Exception('Missing key: ' + name)
>     }
>
>     @Override
>     Object invokeMethod(String name, Object args) {
>         if( name == 'foo' )
>             return 'OK'
>         else
>             super.invokeMethod(name, args)
>     }
> }
>
>
>
> Now, a closure tries to invoke the `foo` method via a context delegate, as
> shown below:
>
> def closure = { it -> foo() }
> closure.delegate = new Context([:])
> closure.setResolveStrategy(Closure.DELEGATE_ONLY)
> assert closure.call() == 'OK'
>
>
>
> However, the above snipper fails with the following message:
>
> java.lang.Exception: Missing key: foo
>
>
> Why does the closure try to access the `foo` attribute instead of invoking
> it as a method? This code works as expected with Groovy 3.
>
>
>
> Thanks,
> Paolo
>
>