<Swing Dev> [9] Backport Request: JDK-8069268 JComponent.AccessibleJComponent.addPropertyListeners adds exponential listeners

[Alexander Scherbatiy]

On 2/17/2015 3:34 AM, Vivi An wrote:
> Hello,
>
> Could you please approve straight backport the bug fix in JDK8 to JDK9?
    Approved.

    Thanks,
    Alexandr.
>
> Bug Description:
> In Component/Container/JComponent's AccessibleContext inner classes, a 
> private variable propertyListenersCount is used to make sure a 
> specific listener is only added once through 
> addPropertyChangeListener. However, ContainerListener which declared 
> in Container's inner class was added to PropertyChangeListener in both 
> Container and it's child class,*in case of nested levels us*ed,*  
> exponential listeners will be adde*d and lead to performance issue*. *
> ***
> **Fix Description:
> The fix removed code in AccessibleJComponent(Inner class of 
> JComponent*) which *add*ing *listener**declared *and*added as property 
> change listener through parent class. This way, the listener won't be 
> added twice and lead to exponential listeners added in nested levels 
> case.*
>
> **
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8069268
> JDK8 Changeset: 
> http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/rev/aafe81a686a2
> Patch: http://cr.openjdk.java.net/~van/8069268/8069268.v2
>
> Thank you
>
> Regards,
>
> Vivi
>