package freemarker.ext.beans;
import java.lang.ref.WeakReference;
import org.zeroturnaround.javarebel.ClassEventListener;
import org.zeroturnaround.javarebel.ReloaderFactory;
/**
* @author Attila Szegedi
* @version $Id: $
*/
class JavaRebelIntegration
{
static void testAvailability() {
ReloaderFactory.getInstance();
}
/**
* Adds a JavaRebel class reloading listener for a that will invalidate
* cached information for that class in the specified BeansWrapper when the
* class is reloaded. The beans wrapper is weakly referenced and the
* listener is unregistered if the wrapper is garbage collected.
* @param w the beans wrapper to register.
*/
static void registerWrapper(BeansWrapper w) {
ReloaderFactory.getInstance().addClassReloadListener(
new BeansWrapperCacheInvalidator(w));
}
private static class BeansWrapperCacheInvalidator
implements ClassEventListener
{
private final WeakReference ref;
BeansWrapperCacheInvalidator(BeansWrapper w) {
ref = new WeakReference(w);
}
public void onClassEvent(int eventType, Class klass) {
BeansWrapper wrapper = (BeansWrapper)ref.get();
if(wrapper == null) {
ReloaderFactory.getInstance().removeClassReloadListener(this);
}
else if(eventType == ClassEventListener.EVENT_RELOADED) {
wrapper.removeIntrospectionInfo(klass);
}
}
}
}
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