[GROOVY-4892] GroovyInterceptable / invokeMethod does not correctly in Groovy 1.8.0 when Methods with no arguments are "delegated"

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.0
• Fix Version/s: 1.8.1
• Component/s: Compiler, primtive opts
• Labels: metaprogramming
• Environment: Windows XP / 7
• Assignee: Jochen Theodorou
• Reporter: Al Calim
• Created: 21/Jun/11 05:16
• Updated: 15/Jul/11 14:38
• Resolved: 15/Jul/11 14:38

Description

please compare
http://stackoverflow.com/questions/6419674/groovyinterceptable-does-not-work-on-methods-with-no-arguments

the following class gives the correct output in Groovy < 1.8, in 1.8 it only works if a parameter is added to the nested method.

A workaround is mentioned in the stackoverflow link.

class SimpleFlow implements GroovyInterceptable {

    def invokeMethod(String name, args) {
        System.out.println("time before ${name} called: ${new Date()}")

        def calledMethod = SimpleFlow.metaClass.getMetaMethod(name, args)
        calledMethod?.invoke(this, args)

        System.out.println("time after ${name} called: ${new Date()}\n")
    }

    void simpleMethod1(){
        System.out.println("simpleMethod1() called")
        simpleMethod2Nested()
    }

    // works well when using an argument
    void simpleMethod2Nested(){
        System.out.println("simpleMethod2Nested")
    }

    public static void main(String[] args) {
        def flow = new SimpleFlow()
        flow.simpleMethod1()
    }
}

actual output:

time before simpleMethod1 called: Tue Jun 21 04:16:41 CEST 2011
simpleMethod1() called
simpleMethod2Nested
time after simpleMethod1 called: Tue Jun 21 04:16:41 CEST 2011

estimated output:
time before simpleMethod1 called: Tue Jun 21 13:32:44 GMT+08:00 2011
simpleMethod1() called
time before simpleMethod2Nested called: Tue Jun 21 13:32:44 GMT+08:00 2011
simpleMethod2Nested
time after simpleMethod2Nested called: Tue Jun 21 13:32:44 GMT+08:00 2011
time after simpleMethod1 called: Tue Jun 21 13:32:44 GMT+08:00 2011