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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This is the stable version. Apart from bugfixes, this version
does not receive any other updates.
/*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Associator.java
* Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
*
*/
package weka.gui.beans;
import weka.associations.Apriori;
import weka.core.Instances;
import weka.core.OptionHandler;
import weka.core.Utils;
import weka.gui.Logger;
import java.awt.BorderLayout;
import java.beans.EventSetDescriptor;
import java.io.Serializable;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;
import javax.swing.JPanel;
/**
* Bean that wraps around weka.associations
*
* @author Mark Hall (mhall at cs dot waikato dot ac dot nz)
* @version $Revision: 7059 $
* @since 1.0
* @see JPanel
* @see BeanCommon
* @see Visible
* @see WekaWrapper
* @see Serializable
* @see UserRequestAcceptor
* @see TrainingSetListener
* @see DataSourceListener
*/
public class Associator
extends JPanel
implements BeanCommon, Visible,
WekaWrapper, EventConstraints,
Serializable, UserRequestAcceptor,
DataSourceListener,
TrainingSetListener {
/** for serialization */
private static final long serialVersionUID = -7843500322130210057L;
protected BeanVisual m_visual =
new BeanVisual("Associator",
BeanVisual.ICON_PATH+"DefaultAssociator.gif",
BeanVisual.ICON_PATH+"DefaultAssociator_animated.gif");
private static int IDLE = 0;
private static int BUILDING_MODEL = 1;
private int m_state = IDLE;
private Thread m_buildThread = null;
/**
* Global info for the wrapped associator (if it exists).
*/
protected String m_globalInfo;
/**
* Objects talking to us
*/
private Hashtable m_listenees = new Hashtable();
/**
* Objects listening for text events
*/
private Vector m_textListeners = new Vector();
/**
* Objects listening for graph events
*/
private Vector m_graphListeners = new Vector();
private weka.associations.Associator m_Associator = new Apriori();
private transient Logger m_log = null;
/**
* Global info (if it exists) for the wrapped classifier
*
* @return the global info
*/
public String globalInfo() {
return m_globalInfo;
}
/**
* Creates a new Associator instance.
*/
public Associator() {
setLayout(new BorderLayout());
add(m_visual, BorderLayout.CENTER);
setAssociator(m_Associator);
}
/**
* Set a custom (descriptive) name for this bean
*
* @param name the name to use
*/
public void setCustomName(String name) {
m_visual.setText(name);
}
/**
* Get the custom (descriptive) name for this bean (if one has been set)
*
* @return the custom name (or the default name)
*/
public String getCustomName() {
return m_visual.getText();
}
/**
* Set the associator for this wrapper
*
* @param c a weka.associations.Associator value
*/
public void setAssociator(weka.associations.Associator c) {
boolean loadImages = true;
if (c.getClass().getName().
compareTo(m_Associator.getClass().getName()) == 0) {
loadImages = false;
}
m_Associator = c;
String associatorName = c.getClass().toString();
associatorName = associatorName.substring(associatorName.
lastIndexOf('.')+1,
associatorName.length());
if (loadImages) {
if (!m_visual.loadIcons(BeanVisual.ICON_PATH+associatorName+".gif",
BeanVisual.ICON_PATH+associatorName+"_animated.gif")) {
useDefaultVisual();
}
}
m_visual.setText(associatorName);
// get global info
m_globalInfo = KnowledgeFlowApp.getGlobalInfo(m_Associator);
}
/**
* Get the associator currently set for this wrapper
*
* @return a weka.associations.Associator value
*/
public weka.associations.Associator getAssociator() {
return m_Associator;
}
/**
* Sets the algorithm (associator) for this bean
*
* @param algorithm an Object value
* @exception IllegalArgumentException if an error occurs
*/
public void setWrappedAlgorithm(Object algorithm) {
if (!(algorithm instanceof weka.associations.Associator)) {
throw new IllegalArgumentException(algorithm.getClass()
+ Messages.getInstance().getString("Associator_SetWrappedAlgorithm_IllegalArgumentException_Text"));
}
setAssociator((weka.associations.Associator)algorithm);
}
/**
* Returns the wrapped associator
*
* @return an Object value
*/
public Object getWrappedAlgorithm() {
return getAssociator();
}
/**
* Accept a training set
*
* @param e a TrainingSetEvent value
*/
public void acceptTrainingSet(TrainingSetEvent e) {
// construct and pass on a DataSetEvent
Instances trainingSet = e.getTrainingSet();
DataSetEvent dse = new DataSetEvent(this, trainingSet);
acceptDataSet(dse);
}
public void acceptDataSet(final DataSetEvent e) {
if (e.isStructureOnly()) {
// no need to build an associator, just absorb and return
return;
}
if (m_buildThread == null) {
try {
if (m_state == IDLE) {
synchronized (this) {
m_state = BUILDING_MODEL;
}
final Instances trainingData = e.getDataSet();
// final String oldText = m_visual.getText();
m_buildThread = new Thread() {
public void run() {
try {
if (trainingData != null) {
m_visual.setAnimated();
// m_visual.setText("Building model...");
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ Messages.getInstance().getString("Associator_AcceptDataSet_StatusMessage_Text_First"));
}
buildAssociations(trainingData);
if (m_textListeners.size() > 0) {
String modelString = m_Associator.toString();
String titleString = m_Associator.getClass().getName();
titleString = titleString.
substring(titleString.lastIndexOf('.') + 1,
titleString.length());
modelString = Messages.getInstance().getString("Associator_AcceptDataSet_ModelString_Text_First")
+ Messages.getInstance().getString("Associator_AcceptDataSet_ModelString_Text_Second") + trainingData.relationName()
+ "\n\n" + modelString;
titleString = Messages.getInstance().getString("Associator_AcceptDataSet_TitleString_Text_First") + titleString;
TextEvent nt = new TextEvent(Associator.this,
modelString,
titleString);
notifyTextListeners(nt);
}
if (m_Associator instanceof weka.core.Drawable &&
m_graphListeners.size() > 0) {
String grphString =
((weka.core.Drawable)m_Associator).graph();
int grphType = ((weka.core.Drawable)m_Associator).graphType();
String grphTitle = m_Associator.getClass().getName();
grphTitle = grphTitle.substring(grphTitle.
lastIndexOf('.')+1,
grphTitle.length());
grphTitle = " ("
+e.getDataSet().relationName() + ") "
+grphTitle;
GraphEvent ge = new GraphEvent(Associator.this,
grphString,
grphTitle,
grphType);
notifyGraphListeners(ge);
}
}
} catch (Exception ex) {
Associator.this.stop();
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ Messages.getInstance().getString("Associator_AcceptDataSet_StatusMessage_Text_Second"));
m_log.logMessage(Messages.getInstance().getString("Associator_AcceptDataSet_LogMessage_Text_First") + statusMessagePrefix()
+ Messages.getInstance().getString("Associator_AcceptDataSet_LogMessage_Text_Second") + ex.getMessage());
}
ex.printStackTrace();
} finally {
// m_visual.setText(oldText);
m_visual.setStatic();
m_state = IDLE;
if (isInterrupted()) {
if (m_log != null) {
String titleString = m_Associator.getClass().getName();
titleString = titleString.
substring(titleString.lastIndexOf('.') + 1,
titleString.length());
m_log.logMessage(Messages.getInstance().getString("Associator_AcceptDataSet_LogMessage_Text_Third") + statusMessagePrefix()
+ Messages.getInstance().getString("Associator_AcceptDataSet_LogMessage_Text_Fourth"));
m_log.statusMessage(statusMessagePrefix() + Messages.getInstance().getString("Associator_AcceptDataSet_StatusMessage_Text_Third"));
}
} else {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + Messages.getInstance().getString("Associator_AcceptDataSet_StatusMessage_Text_Fourth"));
}
}
block(false);
}
}
};
m_buildThread.setPriority(Thread.MIN_PRIORITY);
m_buildThread.start();
// make sure the thread is still running before we block
// if (m_buildThread.isAlive()) {
block(true);
// }
m_buildThread = null;
m_state = IDLE;
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
private void buildAssociations(Instances data)
throws Exception {
m_Associator.buildAssociations(data);
}
/**
* Sets the visual appearance of this wrapper bean
*
* @param newVisual a BeanVisual value
*/
public void setVisual(BeanVisual newVisual) {
m_visual = newVisual;
}
/**
* Gets the visual appearance of this wrapper bean
*/
public BeanVisual getVisual() {
return m_visual;
}
/**
* Use the default visual appearance for this bean
*/
public void useDefaultVisual() {
m_visual.loadIcons(BeanVisual.ICON_PATH+"DefaultAssociator.gif",
BeanVisual.ICON_PATH+"DefaultAssociator_animated.gif");
}
/**
* Add a text listener
*
* @param cl a TextListener value
*/
public synchronized void addTextListener(TextListener cl) {
m_textListeners.addElement(cl);
}
/**
* Remove a text listener
*
* @param cl a TextListener value
*/
public synchronized void removeTextListener(TextListener cl) {
m_textListeners.remove(cl);
}
/**
* Add a graph listener
*
* @param cl a GraphListener value
*/
public synchronized void addGraphListener(GraphListener cl) {
m_graphListeners.addElement(cl);
}
/**
* Remove a graph listener
*
* @param cl a GraphListener value
*/
public synchronized void removeGraphListener(GraphListener cl) {
m_graphListeners.remove(cl);
}
/**
* Notify all text listeners of a text event
*
* @param ge a TextEvent value
*/
private void notifyTextListeners(TextEvent ge) {
Vector l;
synchronized (this) {
l = (Vector)m_textListeners.clone();
}
if (l.size() > 0) {
for(int i = 0; i < l.size(); i++) {
((TextListener)l.elementAt(i)).acceptText(ge);
}
}
}
/**
* Notify all graph listeners of a graph event
*
* @param ge a GraphEvent value
*/
private void notifyGraphListeners(GraphEvent ge) {
Vector l;
synchronized (this) {
l = (Vector)m_graphListeners.clone();
}
if (l.size() > 0) {
for(int i = 0; i < l.size(); i++) {
((GraphListener)l.elementAt(i)).acceptGraph(ge);
}
}
}
/**
* Returns true if, at this time,
* the object will accept a connection with respect to the named event
*
* @param eventName the event
* @return true if the object will accept a connection
*/
public boolean connectionAllowed(String eventName) {
if (m_listenees.containsKey(eventName)) {
return false;
}
return true;
}
/**
* Returns true if, at this time,
* the object will accept a connection according to the supplied
* EventSetDescriptor
*
* @param esd the EventSetDescriptor
* @return true if the object will accept a connection
*/
public boolean connectionAllowed(EventSetDescriptor esd) {
return connectionAllowed(esd.getName());
}
/**
* Notify this object that it has been registered as a listener with
* a source with respect to the named event
*
* @param eventName the event
* @param source the source with which this object has been registered as
* a listener
*/
public synchronized void connectionNotification(String eventName,
Object source) {
if (connectionAllowed(eventName)) {
m_listenees.put(eventName, source);
}
}
/**
* Notify this object that it has been deregistered as a listener with
* a source with respect to the supplied event name
*
* @param eventName the event
* @param source the source with which this object has been registered as
* a listener
*/
public synchronized void disconnectionNotification(String eventName,
Object source) {
m_listenees.remove(eventName);
}
/**
* Function used to stop code that calls acceptTrainingSet. This is
* needed as classifier construction is performed inside a separate
* thread of execution.
*
* @param tf a boolean value
*/
private synchronized void block(boolean tf) {
if (tf) {
try {
// only block if thread is still doing something useful!
if (m_buildThread.isAlive() && m_state != IDLE) {
wait();
}
} catch (InterruptedException ex) {
}
} else {
notifyAll();
}
}
/**
* Returns true if. at this time, the bean is busy with some
* (i.e. perhaps a worker thread is performing some calculation).
*
* @return true if the bean is busy.
*/
public boolean isBusy() {
return (m_buildThread != null);
}
/**
* Stop any associator action
*/
public void stop() {
// tell all listenees (upstream beans) to stop
Enumeration en = m_listenees.keys();
while (en.hasMoreElements()) {
Object tempO = m_listenees.get(en.nextElement());
if (tempO instanceof BeanCommon) {
((BeanCommon)tempO).stop();
}
}
// stop the build thread
if (m_buildThread != null) {
m_buildThread.interrupt();
m_buildThread.stop();
m_buildThread = null;
m_visual.setStatic();
}
}
/**
* Set a logger
*
* @param logger a Logger value
*/
public void setLog(Logger logger) {
m_log = logger;
}
/**
* Return an enumeration of requests that can be made by the user
*
* @return an Enumeration value
*/
public Enumeration enumerateRequests() {
Vector newVector = new Vector(0);
if (m_buildThread != null) {
newVector.addElement("Stop");
}
return newVector.elements();
}
/**
* Perform a particular request
*
* @param request the request to perform
* @exception IllegalArgumentException if an error occurs
*/
public void performRequest(String request) {
if (request.compareTo("Stop") == 0) {
stop();
} else {
throw new IllegalArgumentException(request
+ Messages.getInstance().getString("Associator_PerformRequest_IllegalArgumentException_Text_First"));
}
}
/**
* Returns true, if at the current time, the event described by the
* supplied event descriptor could be generated.
*
* @param esd an EventSetDescriptor value
* @return a boolean value
*/
public boolean eventGeneratable(EventSetDescriptor esd) {
String eventName = esd.getName();
return eventGeneratable(eventName);
}
/**
* Returns true, if at the current time, the named event could
* be generated. Assumes that the supplied event name is
* an event that could be generated by this bean
*
* @param eventName the name of the event in question
* @return true if the named event could be generated at this point in
* time
*/
public boolean eventGeneratable(String eventName) {
if (eventName.compareTo("text") == 0 ||
eventName.compareTo("graph") == 0) {
if (!m_listenees.containsKey("dataSet") &&
!m_listenees.containsKey("trainingSet")) {
return false;
}
Object source = m_listenees.get("trainingSet");
if (source != null && source instanceof EventConstraints) {
if (!((EventConstraints)source).eventGeneratable("trainingSet")) {
return false;
}
}
source = m_listenees.get("dataSet");
if (source != null && source instanceof EventConstraints) {
if (!((EventConstraints)source).eventGeneratable("dataSet")) {
return false;
}
}
if (eventName.compareTo("graph") == 0 &&
!(m_Associator instanceof weka.core.Drawable)) {
return false;
}
}
return true;
}
private String statusMessagePrefix() {
return getCustomName() + "$" + hashCode() + "|"
+ ((m_Associator instanceof OptionHandler &&
Utils.joinOptions(((OptionHandler)m_Associator).getOptions()).length() > 0)
? Utils.joinOptions(((OptionHandler)m_Associator).getOptions()) + "|"
: "");
}
}
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