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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This version represents the developer version, the
"bleeding edge" of development, you could say. New functionality gets added
to this version.
/*
* 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 3 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, see m_listenees = new Hashtable();
/**
* Objects listening for text events
*/
private final Vector m_textListeners = new Vector();
/**
* Objects listening for graph events
*/
private final Vector m_graphListeners = new Vector();
/** The objects listening for batchAssociationRules events **/
private final Vector m_rulesListeners = new Vector();
private weka.associations.Associator m_Associator = new Apriori();
private transient Logger m_log = null;
/** The environment variables */
private transient Environment m_env = 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 environment variables to use.
*
* @param env the environment variables to use
*/
@Override
public void setEnvironment(Environment env) {
m_env = env;
}
/**
* Set a custom (descriptive) name for this bean
*
* @param name the name to use
*/
@Override
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)
*/
@Override
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
*/
@Override
public void setWrappedAlgorithm(Object algorithm) {
if (!(algorithm instanceof weka.associations.Associator)) {
throw new IllegalArgumentException(algorithm.getClass() + " : incorrect "
+ "type of algorithm (Associator)");
}
setAssociator((weka.associations.Associator) algorithm);
}
/**
* Returns the wrapped associator
*
* @return an Object value
*/
@Override
public Object getWrappedAlgorithm() {
return getAssociator();
}
/**
* Accept a training set
*
* @param e a TrainingSetEvent value
*/
@Override
public void acceptTrainingSet(TrainingSetEvent e) {
// construct and pass on a DataSetEvent
Instances trainingSet = e.getTrainingSet();
DataSetEvent dse = new DataSetEvent(this, trainingSet);
acceptDataSet(dse);
}
@Override
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() {
@SuppressWarnings("deprecation")
@Override
public void run() {
try {
if (trainingData != null) {
m_visual.setAnimated();
// m_visual.setText("Building model...");
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ "Building model...");
}
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 = "=== Associator model ===\n\n" + "Scheme: "
+ titleString + "\n" + "Relation: "
+ trainingData.relationName() + "\n\n" + modelString;
titleString = "Model: " + 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);
}
if ((m_Associator instanceof AssociationRulesProducer)
&& m_rulesListeners.size() > 0) {
AssociationRules rules = ((AssociationRulesProducer) m_Associator)
.getAssociationRules();
BatchAssociationRulesEvent bre = new BatchAssociationRulesEvent(
Associator.this, rules);
notifyRulesListeners(bre);
}
}
} catch (Exception ex) {
Associator.this.stop();
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details)");
m_log.logMessage("[Associator] " + statusMessagePrefix()
+ " problem training associator. " + 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("[Associator] " + statusMessagePrefix()
+ " Build associator interrupted!");
m_log.statusMessage(statusMessagePrefix() + "INTERRUPTED");
}
} else {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
}
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 {
// see if there is an environment variable with
// options for the associator
if (m_env != null && m_Associator instanceof OptionHandler) {
String opts = m_env
.getVariableValue("weka.gui.beans.associator.schemeOptions");
if (opts != null && opts.length() > 0) {
String[] options = Utils.splitOptions(opts);
if (options.length > 0) {
try {
((OptionHandler) m_Associator).setOptions(options);
} catch (Exception ex) {
String warningMessage = "[Associator] WARNING: unable to set options \""
+ opts + "\"for " + m_Associator.getClass().getName();
if (m_log != null) {
m_log.logMessage(warningMessage);
} else {
System.err.print(warningMessage);
}
}
}
}
}
m_Associator.buildAssociations(data);
}
/**
* Sets the visual appearance of this wrapper bean
*
* @param newVisual a BeanVisual value
*/
@Override
public void setVisual(BeanVisual newVisual) {
m_visual = newVisual;
}
/**
* Gets the visual appearance of this wrapper bean
*/
@Override
public BeanVisual getVisual() {
return m_visual;
}
/**
* Use the default visual appearance for this bean
*/
@Override
public void useDefaultVisual() {
m_visual.loadIcons(BeanVisual.ICON_PATH + "DefaultAssociator.gif",
BeanVisual.ICON_PATH + "DefaultAssociator_animated.gif");
}
/**
* Add a batch association rules listener
*
* @param al a BatchAssociationRulesListener
*/
public synchronized void addBatchAssociationRulesListener(
BatchAssociationRulesListener al) {
m_rulesListeners.add(al);
}
/**
* Remove a batch association rules listener
*
* @param al a BatchAssociationRulesListener
*/
public synchronized void removeBatchAssociationRulesListener(
BatchAssociationRulesListener al) {
m_rulesListeners.remove(al);
}
/**
* 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);
}
/**
* We don't have to keep track of configuration listeners (see the
* documentation for ConfigurationListener/ConfigurationEvent).
*
* @param cl a ConfigurationListener.
*/
@Override
public synchronized void addConfigurationListener(ConfigurationListener cl) {
}
/**
* We don't have to keep track of configuration listeners (see the
* documentation for ConfigurationListener/ConfigurationEvent).
*
* @param cl a ConfigurationListener.
*/
@Override
public synchronized void removeConfigurationListener(ConfigurationListener cl) {
}
/**
* Notify all text listeners of a text event
*
* @param ge a TextEvent value
*/
@SuppressWarnings("unchecked")
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
*/
@SuppressWarnings("unchecked")
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);
}
}
}
/**
* Notify all batch association rules listeners of a rules event.
*
* @param are a BatchAssociationRulesEvent value
*/
@SuppressWarnings("unchecked")
private void notifyRulesListeners(BatchAssociationRulesEvent are) {
Vector l;
synchronized (this) {
l = (Vector) m_rulesListeners.clone();
for (int i = 0; i < l.size(); i++) {
l.get(i).acceptAssociationRules(are);
}
}
}
/**
* 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
*/
@Override
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
*/
@Override
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
*/
@Override
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
*/
@Override
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.
*/
@Override
public boolean isBusy() {
return (m_buildThread != null);
}
/**
* Stop any associator action
*/
@SuppressWarnings("deprecation")
@Override
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
*/
@Override
public void setLog(Logger logger) {
m_log = logger;
}
/**
* Return an enumeration of requests that can be made by the user
*
* @return an Enumeration value
*/
@Override
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
*/
@Override
public void performRequest(String request) {
if (request.compareTo("Stop") == 0) {
stop();
} else {
throw new IllegalArgumentException(request
+ " not supported (Associator)");
}
}
/**
* 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);
}
/**
* Get the structure of the output encapsulated in the named event. If the
* structure can't be determined in advance of seeing input, or this
* StructureProducer does not generate the named event, null should be
* returned.
*
* @param eventName the name of the output event that encapsulates the
* requested output.
*
* @return the structure of the output encapsulated in the named event or null
* if it can't be determined in advance of seeing input or the named
* event is not generated by this StructureProduce.
*/
@Override
public Instances getStructure(String eventName) {
Instances structure = null;
if (eventName.equals("text")) {
ArrayList attInfo = new ArrayList();
attInfo.add(new Attribute("Title", (ArrayList) null));
attInfo.add(new Attribute("Text", (ArrayList) null));
structure = new Instances("TextEvent", attInfo, 0);
} else if (eventName.equals("batchAssociationRules")) {
if (m_Associator != null
&& m_Associator instanceof AssociationRulesProducer) {
// we make the assumption here that consumers of
// batchAssociationRules events will utilize a structure
// consisting of the RHS of the rule (String), LHS of the
// rule (String) and one numeric attribute for each metric
// associated with the rules.
String[] metricNames = ((AssociationRulesProducer) m_Associator)
.getRuleMetricNames();
ArrayList attInfo = new ArrayList();
attInfo.add(new Attribute("LHS", (ArrayList) null));
attInfo.add(new Attribute("RHS", (ArrayList) null));
attInfo.add(new Attribute("Support"));
for (String metricName : metricNames) {
attInfo.add(new Attribute(metricName));
}
structure = new Instances("batchAssociationRulesEvent", attInfo, 0);
}
}
return structure;
}
/**
* 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
*/
@Override
public boolean eventGeneratable(String eventName) {
if (eventName.compareTo("text") == 0 || eventName.compareTo("graph") == 0
|| eventName.equals("batchAssociationRules")) {
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;
}
if (eventName.equals("batchAssociationRules")) {
if (!(m_Associator instanceof AssociationRulesProducer)) {
return false;
}
if (!((AssociationRulesProducer) m_Associator).canProduceRules()) {
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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