[GROOVY-4744] Fail to extend Java class with public final String getProperty(String s)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.7.6
• Component/s: Compiler
• Assignee: Unassigned
• Reporter: Paul Cager
• Created: 23/Mar/11 09:53
• Updated: 14/Sep/18 11:01

Description

Issue GROOVY-2837 reported a problem where Groovy compiler failed if you tried to extend a Java class with:

public final Object getProperty(String s)

It looks like that has been fixed but the following case still fails:

public final String getProperty(String s)

Unfortunately the Java class is within a third-party library so I can't change it.

Code to Reproduce the problem

$ head *.java
==> Java1.java <==
public class Java1 {
  public final Object getProperty(String s) { return null; }
}

==> Java2.java <==
public class Java2 {
  public final String getProperty(String s) { return null; }
}

$ head *.groovy
==> Groovy1.groovy <==
class Groovy1 extends Java1 { }

==> Groovy2.groovy <==
class Groovy2 extends Java2 { }

$ javac *.java
$ groovyc *.groovy
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Groovy2.groovy: -1: You are not allowed to override the final method getProperty(java.lang.String) from class 'Java2'.
 @ line -1, column -1.
1 error