74 lines
1.8 KiB
Java
74 lines
1.8 KiB
Java
package dev.kske.eventbus.core.handler;
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import java.lang.reflect.InvocationTargetException;
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import java.util.function.Consumer;
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/**
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* An event handler wrapping a callback method.
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*
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* @author Kai S. K. Engelbart
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* @since 1.2.0
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*/
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public final class CallbackEventHandler implements EventHandler {
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private final Class<?> eventType;
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private final Consumer<Object> callback;
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private final boolean polymorphic;
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private final int priority;
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/**
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* Constructs a callback event handler.
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*
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* @param <E> the event type of the handler
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* @param eventType the event type of the handler
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* @param callback the callback method to execute when the handler is invoked
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* @param polymorphic whether the handler is polymorphic
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* @param priority the priority of the handler
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* @since 1.2.0
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*/
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@SuppressWarnings("unchecked")
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public <E> CallbackEventHandler(Class<E> eventType, Consumer<E> callback, boolean polymorphic,
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int priority) {
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this.eventType = eventType;
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this.callback = (Consumer<Object>) callback;
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this.polymorphic = polymorphic;
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this.priority = priority;
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}
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@Override
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public void execute(Object event) throws InvocationTargetException {
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try {
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callback.accept(event);
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} catch (RuntimeException e) {
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throw new InvocationTargetException(e, "Callback event handler failed!");
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}
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}
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@Override
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public String toString() {
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return String.format(
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"CallbackEventHandler[eventType=%s, polymorphic=%b, priority=%d]",
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eventType, polymorphic, priority);
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}
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@Override
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public Consumer<?> getListener() {
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return callback;
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}
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@Override
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public Class<?> getEventType() {
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return eventType;
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}
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@Override
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public int getPriority() {
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return priority;
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}
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@Override
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public boolean isPolymorphic() {
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return polymorphic;
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}
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}
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