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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below. //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard //
// Scheines, Joseph Ramsey, and Clark Glymour. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program 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 General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program; if not, write to the Free Software //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //
///////////////////////////////////////////////////////////////////////////////
package edu.cmu.tetrad.session;
import java.util.ArrayList;
import java.util.List;
/**
* Handles firing of SessionSupport events to listeners.
*
* @author josephramsey
*/
public class SessionSupport {
/**
* The source of the events.
*/
private final Object source;
/**
* The list of session listener--for instance, GUI editors displaying this session and allowing it to be edited.
*/
private final List sessionListeners = new ArrayList();
/**
* Constructs a new session support object for the given source object. The source object will be stamped on all
* fired events.
*/
public SessionSupport(Object source) {
if (source == null) {
throw new IllegalArgumentException("Source must not be null.");
}
this.source = source;
}
/**
* Adds a listener for SessionEvents.
*/
public void addSessionListener(SessionListener l) {
if (!(this.sessionListeners.contains(l))) {
this.sessionListeners.add(l);
}
}
/**
* Removes a listener for SessionEvents.
*/
public void removeSessionListener(SessionListener l) {
this.sessionListeners.remove(l);
}
/**
* Fires an event indicating that a session node has been added to the session.
*/
public void fireNodeAdded(SessionNode node) {
SessionEvent event =
new SessionEvent(this.source, node, SessionEvent.NODE_ADDED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that a sesison node has been removed from the session.
*/
public void fireNodeRemoved(SessionNode node) {
SessionEvent event =
new SessionEvent(this.source, node, SessionEvent.NODE_REMOVED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that a parent has been added from the given parent to the given child session node in
* the session.
*/
public void fireParentAdded(SessionNode parent, SessionNode child) {
SessionEvent event = new SessionEvent(this.source, parent, child,
SessionEvent.PARENT_ADDED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that a parent has been removed from the given parent to the given child session node in
* the session.
*/
public void fireParentRemoved(SessionNode parent, SessionNode child) {
SessionEvent event = new SessionEvent(this.source, parent, child,
SessionEvent.PARENT_REMOVED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that a new model has been created for the given session node in the session.
*/
public void fireModelCreated(SessionNode node) {
SessionEvent event =
new SessionEvent(this.source, node, SessionEvent.MODEL_CREATED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that the model for the given session node in the session has been destroyed.
*/
public void fireModelDestroyed(SessionNode node) {
SessionEvent event = new SessionEvent(this.source, node,
SessionEvent.MODEL_DESTROYED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that the model for the given session node in the session has been destroyed.
*/
public void fireModelUnclear(SessionNode node) {
SessionEvent event =
new SessionEvent(this.source, node, SessionEvent.MODEL_UNCLEAR);
fireSessionEvent(event);
}
/**
* Fires an event indicating that the model for the given session node in the session has been destroyed.
*/
public void fireRepetitionChanged(SessionNode node) {
SessionEvent event = new SessionEvent(this.source, node,
SessionEvent.REPETITION_CHANGED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that an new execution of a node has begun.
*/
public void fireExecutionStarted() {
SessionEvent event =
new SessionEvent(this.source, SessionEvent.EXECUTION_STARTED);
fireSessionEvent(event);
}
/**
* Fires an event indicating that an edge is about to be added.
*/
public void fireAddingEdge() {
SessionEvent event =
new SessionEvent(this.source, SessionEvent.ADDING_EDGE);
fireSessionEvent(event);
}
/**
* Fires a session event. Calls the correct method on the listener for the type of session event it is. All event
* fired with this session support are stamped with the source object of this session support.
*/
public void fireSessionEvent(SessionEvent event) {
fireSessionEvent(event, true);
}
/**
* Fires a session event. Calls the correct method on the listener for the type of session event it is. Events are
* restamped with the source object of this session support if restamp is true.
*
* @param event the session event to fire.
* @param restamp true iff the source of this event should be set to the source of this SessionSupport object.
*/
public void fireSessionEvent(SessionEvent event, boolean restamp) {
if (restamp && event.getSource() != this.source) {
event = new SessionEvent(this.source, event);
}
for (Object sessionListener : this.sessionListeners) {
SessionListener l = (SessionListener) sessionListener;
switch (event.getType()) {
case SessionEvent.NODE_ADDED:
l.nodeAdded(event);
break;
case SessionEvent.NODE_REMOVED:
l.nodeRemoved(event);
break;
case SessionEvent.PARENT_ADDED:
l.parentAdded(event);
break;
case SessionEvent.PARENT_REMOVED:
l.parentRemoved(event);
break;
case SessionEvent.MODEL_CREATED:
l.modelCreated(event);
break;
case SessionEvent.MODEL_DESTROYED:
l.modelDestroyed(event);
break;
case SessionEvent.MODEL_UNCLEAR:
l.modelUnclear(event);
break;
case SessionEvent.EXECUTION_STARTED:
l.executionStarted(event);
break;
case SessionEvent.REPETITION_CHANGED:
l.repetitionChanged(event);
break;
case SessionEvent.ADDING_EDGE:
l.addingEdge(event);
break;
default:
throw new IllegalStateException(
"No such state: " + event.getType());
}
}
}
}
