[GROOVY-10504] Cannot call static method from Java interface (Groovy 4)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Information Provided
• Affects Version/s: 4.0.0
• Component/s: Compiler

Language

groovy

• Assignee: Eric Milles
• Reporter: Renato Athaydes
• Created: 22/Feb/22 16:30
• Updated: 21/Apr/22 14:10
• Resolved: 23/Feb/22 21:40

Description

Create a Java interface with a static method:

public interface JavaInterface {
   static String getString(String input) {
     return input;
  }
}

 

A simple Groovy class that uses that:

 

class Example implements JavaInterface {
   static void main(String[] args) {
     println getString('OK')
  }
}

Running this works fine in Groovy 3.0.9.

In Groovy 4.0.0 I get this runtime error:

Exception in thread "main" groovy.lang.MissingMethodException: No signature of method: static tests.Example.getString() is applicable for argument types: (String) values: [OK]
Possible solutions: toString(), toString(), getAt(java.lang.String)
        at groovy.lang.MetaClassImpl.invokeStaticMissingMethod(MetaClassImpl.java:1677)
        at groovy.lang.MetaClassImpl.invokeStaticMethod(MetaClassImpl.java:1663)
        at org.codehaus.groovy.runtime.callsite.StaticMetaClassSite.callStatic(StaticMetaClassSite.java:64)
        at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:54)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:217)
        at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:231)
        at tests.Example.main(Example.groovy:5)

Issue Links

• is caused by: GROOVY-8164 Groovy allows a Java class to inherit static methods from its interface
• relates to: GROOVY-10590 Static methods of interfaces are not resolved anymore in implementig classes with Groovy 4.x