[GROOVY-3708] Intercepting an indirectly called method doesn't work.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.3, 1.6.4, 1.7-beta-1
• Fix Version/s: 4.0.0-beta-1
• Component/s: groovy-runtime
• Environment: Windows XP SP2, JDK 1.5
• Assignee: Eric Milles
• Reporter: Robin Sharma
• Created: 28/Aug/09 03:32
• Updated: 03/Feb/22 22:34
• Resolved: 03/Jan/22 00:48

Description

In the code below, the method to be intercepted, callMeToo, is called internally by another method callMe that is explicitly invoked. When a call to callMe is made, only callMe is intercepted, but the internally called method callMeToo is not intercepted.

InterceptMe.groovy

class InterceptMe { 
    String callMe(String input) { 
        input = "<<" + input + ">>" 
        callMeToo(input) 
    } 
    
    String callMeToo(String input) { 
        input += "...//\\\\..." 
        println "The input is: $input" 
        
        input 
    } 
    
    static void main(args) { 
        InterceptMe.metaClass.invokeMethod = { name, arg -> 
            if(name == "callMeToo") { 
                println "Arguments passed to this method: $arg" 
            }
            
            def actualMethod = InterceptMe.metaClass.getMetaMethod(name, arg) 
            actualMethod?.invoke(delegate, arg) 
        } 
        
        InterceptMe ime = new InterceptMe() 
        ime.callMe("bbbb") // <-- Doesn't print the arguments 
        ime.callMeToo("bbbb") // <-- Prints the arguments
    } 
}

Please refer to the following discussion on the Nabble Groovy User Forum for more details:

http://www.nabble.com/How-to-intercept-an-implicitly-called-Method--td25076161.html

-Kodeninja