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From "Roman S. Bushmanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-4011) [classlib][beans] compatibility: java.beans.beancontext.BeanContextSupport allows registering the same listener several times
Date Thu, 31 May 2007 11:32:18 GMT
[classlib][beans] compatibility: java.beans.beancontext.BeanContextSupport allows registering
the same listener several times
-----------------------------------------------------------------------------------------------------------------------------

                 Key: HARMONY-4011
                 URL: https://issues.apache.org/jira/browse/HARMONY-4011
             Project: Harmony
          Issue Type: Bug
          Components: Classlib
            Reporter: Roman S. Bushmanov


Successive calls to addBeanContextMembershipListener() method with the same object as argument
result in adding that object into listener set multiple times. RI behaves differently.

The exact behaviour in the described case is not specified, but it makes sense to be compatible
with RI. 

To reproduce the issue, please run the test listed below.

-------------------------- Expected output (= RI output): -----------------------
Listener added
ADDED
Listener added
ADDED

---------------------------------- Harmony output ----------------------------------
Listener added
ADDED
Listener added
ADDED
ADDED

---------------------------------------  Test.java  --------------------------------------

import java.beans.beancontext.*;

public class Test{

    public static void main(String[] args){

        BeanContextSupport context = new BeanContextSupport();
        BeanContextMembershipListener listener = new BeanContextMembershipListener() {
            public void childrenAdded(BeanContextMembershipEvent bcme) {
                System.out.println("ADDED");
            }

            public void childrenRemoved(BeanContextMembershipEvent bcme){}
        };

        // add listener
        context.addBeanContextMembershipListener(listener);
        System.out.println("Listener added");
        context.add(new BeanContextChildSupport());
        
        // add the same listener onse again
        System.out.println("Listener added again");
        context.addBeanContextMembershipListener(listener);
        context.add(new BeanContextChildSupport());
}


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