il.ac.bgu.cs.bp.bpjs.model.eventsets.EventSets Maven / Gradle / Ivy
package il.ac.bgu.cs.bp.bpjs.model.eventsets;
import il.ac.bgu.cs.bp.bpjs.model.BEvent;
import java.io.ObjectStreamException;
/**
* Utility class for commonly used event sets.
*/
public final class EventSets {
private EventSets(){
// prevent instantiation.
}
/**
* An event set that contains all events and event sets.
* @author Bertrand Russel
*/
public final static EventSet all = new EventSet() {
@Override
public boolean contains(BEvent event) {
return (event instanceof EventSet) || (event instanceof BEvent);
}
@Override
public String toString() {
return ("{all}");
}
private Object readResolve() throws ObjectStreamException {
return all;
}
};
/**
* An event set containing no events.
*/
public final static EventSet none = new EventSet() {
@Override
public boolean contains(BEvent event) {
return false;
}
@Override
public String toString() {
return "{none}";
}
private Object readResolve() throws ObjectStreamException {
return none;
}
};
}