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package com.sun.faces.application.applicationimpl.events;
import javax.faces.event.SystemEvent;
import com.sun.faces.util.Cache;
import com.sun.faces.util.Cache.Factory;
/**
* Utility class for dealing with {@link javax.faces.component.UIComponent} events.
*/
public class ComponentSystemEventHelper {
private Cache<Class<?>, Cache<Class<? extends SystemEvent>, EventInfo>> sourceCache;
// -------------------------------------------------------- Constructors
public ComponentSystemEventHelper() {
// Initialize the 'sources' cache for, ahem, readability...
// ~generics++
Factory<Class<?>, Cache<Class<? extends SystemEvent>, EventInfo>> eventCacheFactory = new Factory<Class<?>, Cache<Class<? extends SystemEvent>, EventInfo>>() {
@Override
public Cache<Class<? extends SystemEvent>, EventInfo> newInstance(final Class<?> sourceClass) throws InterruptedException {
Factory<Class<? extends SystemEvent>, EventInfo> eventInfoFactory = new Factory<Class<? extends SystemEvent>, EventInfo>() {
@Override
public EventInfo newInstance(final Class<? extends SystemEvent> systemEventClass) throws InterruptedException {
return new EventInfo(systemEventClass, sourceClass);
}
};
return new Cache<>(eventInfoFactory);
}
};
sourceCache = new Cache<>(eventCacheFactory);
}
// ------------------------------------------------------ Public Methods
public EventInfo getEventInfo(Class<? extends SystemEvent> systemEvent, Class<?> sourceClass) {
Cache<Class<? extends SystemEvent>, EventInfo> eventsCache = sourceCache.get(sourceClass);
return eventsCache.get(systemEvent);
}
}