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package cucumber.runner;

import cucumber.api.event.Event;
import cucumber.api.event.EventHandler;
import cucumber.api.event.EventPublisher;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class EventBus implements EventPublisher {
    private final TimeService stopWatch;
    private Map, List> handlers = new HashMap, List>();

    public EventBus(TimeService stopWatch) {
        this.stopWatch = stopWatch;
    }

    public Long getTime() {
        return stopWatch.time();
    }

    public void send(Event event) {
        if (handlers.containsKey(event.getClass())) {
            for (EventHandler handler : handlers.get(event.getClass())) {
                //noinspection unchecked: protected by registerHandlerFor
                handler.receive(event);
            }
        }
    }

    @Override
    public  void registerHandlerFor(Class eventType, EventHandler handler) {
        if (handlers.containsKey(eventType)) {
            handlers.get(eventType).add(handler);
        } else {
            List list = new ArrayList();
            list.add(handler);
            handlers.put(eventType, list);
        }
    }
}