// $Id: RootContainerAdapter.java 53 2010-04-06 14:06:53Z marcusvnac $
// Copyright (c) 2007, 2008 Bogdan Pistol and other contributors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the ArgoUML Project nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE ArgoUML PROJECT ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE ArgoUML PROJECT BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package org.argouml.model.euml;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.ecore.util.EContentAdapter;
/**
* Maintains a list of notifiers descendants of the root container that are
* firing events to this adapter.
*
* @author Bogdan Pistol
*/
public class RootContainerAdapter extends EContentAdapter {
private List<Notifier> notifiers = new ArrayList<Notifier>();
private List<Notification> events = new ArrayList<Notification>();
private Notifier rootContainer;
private ModelEventPumpEUMLImpl pump;
private boolean deliverEvents = true;
private boolean holdEvents = false;
/**
* Constructor
* @param pump The ModelEventPump instance
*/
public RootContainerAdapter(ModelEventPumpEUMLImpl pump) {
super();
this.pump = pump;
}
/**
* Stop or start the firing of events.
* @param value True for delivering events, false otherwise
*/
public void setDeliverEvents(boolean value) {
deliverEvents = value;
}
/**
* Setter for the root container
* @param n the new root container
*/
public void setRootContainer(Notifier n) {
if (n == rootContainer) {
return;
}
removeAllAdapters();
if (n != null) {
rootContainer = n;
rootContainer.eAdapters().add(this);
}
}
@Override
protected void addAdapter(Notifier notifier) {
notifiers.add(notifier);
super.addAdapter(notifier);
}
@Override
protected void removeAdapter(Notifier notifier) {
notifiers.remove(notifier);
super.removeAdapter(notifier);
}
/**
* Removes this listener from all the notifiers' eAdapters list.
*/
public void removeAllAdapters() {
List<Notifier> notifiersToRemove = new ArrayList<Notifier>(notifiers);
for (Notifier n : notifiersToRemove) {
super.removeAdapter(n);
}
if (rootContainer != null) {
super.removeAdapter(rootContainer);
rootContainer = null;
}
notifiers.clear();
}
@Override
public void notifyChanged(Notification notification) {
super.notifyChanged(notification);
if (deliverEvents) {
if (holdEvents) {
events.add(notification);
} else {
pump.notifyChanged(notification);
}
}
}
/**
* Clears all the events held until now
*/
public void clearHeldEvents() {
events.clear();
}
/**
* Determine if the events should be delivered when they arrive or to wait until holdEvents is false
* @param value the holdEvents value
*/
public void setHoldEvents(boolean value) {
if (value == false) {
if (deliverEvents) {
for (Notification n : events) {
pump.notifyChanged(n);
}
}
events.clear();
}
holdEvents = value;
}
}