/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.pvm.internal.model;

import org.jbpm.api.listener.EventListener;
import org.jbpm.pvm.internal.util.ReflectUtil;
import org.jbpm.pvm.internal.wire.Descriptor;

/**
 * @author Tom Baeyens
 */
public class EventListenerReference extends ProcessElementImpl {

  private static final long serialVersionUID = 1L;

  protected EventListener eventListener;
  protected boolean isEventListenerStateful= false;
  protected Descriptor eventListenerDescriptor;
  /** does this action accept propagated events ?  */
  protected boolean isPropagationEnabled = false;
  protected Continuation continuation = Continuation.SYNCHRONOUS;

  /** does this action accept propagated events ?  Default is false. */
  public boolean isPropagationEnabled() {
    return isPropagationEnabled;
  }

  /** does this action accept propagated events ?  Default is false. */
  public void setPropagationEnabled(boolean isPropagationEnabled) {
    this.isPropagationEnabled = isPropagationEnabled;
  }

  public boolean isAsync() {
    return Continuation.SYNCHRONOUS!=continuation;
  }

  // customized getters and setters ///////////////////////////////////////////

  public EventListener getEventListener() {
    if (eventListener!=null) {
      return eventListener;
    }
    if (eventListenerDescriptor!=null) {
      EventListener createdEventListener = (EventListener) ReflectUtil.instantiateUserCode(eventListenerDescriptor, processDefinition);
      if (!isEventListenerStateful) {
        eventListener = createdEventListener;
      }
      return createdEventListener;
    }
    return null;
  }
  
  // getters and setters //////////////////////////////////////////////////////

  public Continuation getContinuation() {
    return continuation;
  }
  public void setContinuation(Continuation continuation) {
    this.continuation = continuation;
  }
  public void setEventListener(EventListener eventListener) {
    this.eventListener = eventListener;
  }
  public boolean isEventListenerStateful() {
    return isEventListenerStateful;
  }
  public void setEventListenerStateful(boolean isEventListenerStateful) {
    this.isEventListenerStateful = isEventListenerStateful;
  }
  public Descriptor getEventListenerDescriptor() {
    return eventListenerDescriptor;
  }
  public void setEventListenerDescriptor(Descriptor eventListenerDescriptor) {
    this.eventListenerDescriptor = eventListenerDescriptor;
  }
}