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feat: implemented listener registration

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zaaarf 2023-08-23 23:16:05 +02:00
parent 3438b7a38f
commit e24269a30b
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3 changed files with 21 additions and 12 deletions
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21
src/main/java/ftbsc/geb/GEB.java
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@ -3,8 +3,8 @@ package ftbsc.geb;
import ftbsc.geb.api.IBus;
import ftbsc.geb.api.IEvent;
import ftbsc.geb.api.IEventDispatcher;
import ftbsc.geb.api.IListener;
import java.lang.reflect.Constructor;
import java.util.Map;
import java.util.ServiceLoader;
import java.util.concurrent.ConcurrentHashMap;
@ -21,9 +21,12 @@ public class GEB implements IBus {
private final String identifier;
/**
* A {@link Map} tying each user-defined event class to its machine-generated implementation.
* In practice, the {@link Class} of the original event is used as key and mapped to each
* class' generated {@link Constructor}.
* A {@link Map} tying each listener class to its instance.
*/
private final Map<Class<? extends IListener>, IListener> listenerMap;
/**
* A {@link Map} tying each event class to the appropriate dispatcher.
*/
private final Map<Class<? extends IEvent>, IEventDispatcher> dispatchMap;
@ -33,17 +36,19 @@ public class GEB implements IBus {
*/
public GEB(String identifier) {
this.identifier = identifier;
this.listenerMap = new ConcurrentHashMap<>();
this.dispatchMap = new ConcurrentHashMap<>();
for(IEventDispatcher dispatcher : ServiceLoader.load(IEventDispatcher.class))
dispatchMap.put(dispatcher.eventType(), dispatcher);
}
/**
* @return the identifier of this bus
* Registers a new listener on the bus.
* @param listener the listener
*/
@Override
public String getIdentifier() {
return identifier;
public void registerListener(IListener listener) {
this.listenerMap.put(listener.getClass(), listener);
}
/**
@ -53,6 +58,6 @@ public class GEB implements IBus {
*/
@Override
public boolean handleEvent(IEvent event) {
return dispatchMap.get(event.getClass()).callListeners(this.identifier, event);
return this.dispatchMap.get(event.getClass()).callListeners(this.identifier, event, this.listenerMap);
}
}

5
src/main/java/ftbsc/geb/api/IBus.java
View file

@ -7,9 +7,10 @@ package ftbsc.geb.api;
*/
public interface IBus {
/**
* @return the identifier of this bus
* Registers a new listener on the bus.
* @param listener the listener
*/
String getIdentifier();
void registerListener(IListener listener);
/**
* Dispatches an event, calling all of its listeners that are subscribed to this bus.

7
src/main/java/ftbsc/geb/api/IEventDispatcher.java
View file

@ -1,5 +1,7 @@
package ftbsc.geb.api;
import java.util.Map;
/**
* The interface that the generated dispatchers will all use.
* This interface isn't really meant to be used by humans, but it should work if your
@ -11,12 +13,13 @@ public interface IEventDispatcher {
* Calls all listeners for the given identifier.
* @param identifier the identifier of the bus that's calling this
* @param event the event to call
* @param listeners a map mapping each {@link IListener} class to its instance
* @return the value {@link IBus#handleEvent(IEvent)} will return for this
*/
boolean callListeners(String identifier, IEvent event);
boolean callListeners(String identifier, IEvent event, Map<Class<? extends IListener>, IListener> listeners);
/**
* @return the {@link Class} representing the event in question
* @return the {@link Class} representing the event this dispatcher works with
*/
Class<? extends IEvent> eventType();
}