cf.janga.javafire.eventing.core.EventImpl.java Source code

Introduction

Here is the source code for cf.janga.javafire.eventing.core.EventImpl.java

Source

/*******************************************************************************
 * Copyright (c) 2014 Emerson Loureiro.
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License v1.0 which
 * accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html.
 * 
 * Contributors:
 *    Emerson Loureiro - initial API, implementation, and documentation
 *******************************************************************************/
package cf.janga.javafire.eventing.core;

import java.lang.reflect.Method;

import org.apache.commons.lang.UnhandledException;

import cf.janga.javafire.annotations.Event.DuplicateResolution;
import cf.janga.javafire.eventing.utils.EventingUtils;

/**
 * Default implementation of {@link Event}.
 * 
 * @author Emerson Loureiro
 */
class EventImpl implements Event {

    private final Object event;

    private final Method eventKeyMethod;

    public EventImpl(Object event) {
        this.event = event;
        this.eventKeyMethod = EventingUtils.getEventKeyMethods(this.event.getClass()).get(0);
    }

    @Override
    public String getKey() {
        try {
            return (String) this.eventKeyMethod.invoke(this.event);
        } catch (Exception e) {
            throw new UnhandledException("Error getting key for event " + this.event.getClass(), e);
        }
    }

    @Override
    public boolean isLastEventWins() {
        return EventingUtils.getEventAnnotation(this.event.getClass())
                .duplicateResolution() == DuplicateResolution.LAST_WINS;
    }

    @Override
    public Object getWrappedEvent() {
        return this.event;
    }

    @Override
    public String getId() {
        return getKey() + "-" + this.event.getClass().getName();
    }
}