source: events/src/main/java/geniusweb/events/AbstractEvent.java@ 52

package geniusweb.events;

public abstract class AbstractEvent implements NegotiationEvent {

        private final Long time;

        @Override
        public Long getTime() {
                return time;
        }

        public AbstractEvent() {
                this.time = System.currentTimeMillis();
        }

        /**
         * @param now the current time to use. see {@link System#currentTimeMillis()}.
         */
        public AbstractEvent(Long now) {
                if (now == null || now < 0) {
                        throw new IllegalArgumentException("time must be non-null and positive");
                }
                this.time = now;
        }

        @Override
        public String toString() {
                return this.getClass().getSimpleName() + "[" + time + "]";
        }

        @Override
        public int hashCode() {
                final int prime = 31;
                int result = 1;
                result = prime * result + ((time == null) ? 0 : time.hashCode());
                return result;
        }

        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (obj == null)
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                AbstractEvent other = (AbstractEvent) obj;
                if (time == null) {
                        if (other.time != null)
                                return false;
                } else if (!time.equals(other.time))
                        return false;
                return true;
        }

}