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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 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 String value
*/
public String globalInfo() {
return "Split an incoming data set into separate train and test sets.";
}
/**
* Tip text info for this property
*
* @return a String value
*/
public String trainPercentTipText() {
return "The percentage of data to go into the training set";
}
/**
* Set the percentage of data to be in the training portion of the split
*
* @param newTrainPercent an int value
*/
public void setTrainPercent(double newTrainPercent) {
m_trainPercentage = newTrainPercent;
}
/**
* Get the percentage of the data that will be in the training portion of the
* split
*
* @return an int value
*/
public double getTrainPercent() {
return m_trainPercentage;
}
/**
* Tip text for this property
*
* @return a String value
*/
public String seedTipText() {
return "The randomization seed";
}
/**
* Set the random seed
*
* @param newSeed an int value
*/
public void setSeed(int newSeed) {
m_randomSeed = newSeed;
}
/**
* Get the value of the random seed
*
* @return an int value
*/
public int getSeed() {
return m_randomSeed;
}
/**
* Accept a training set
*
* @param e a TrainingSetEvent value
*/
@Override
public void acceptTrainingSet(TrainingSetEvent e) {
Instances trainingSet = e.getTrainingSet();
DataSetEvent dse = new DataSetEvent(this, trainingSet);
acceptDataSet(dse);
}
/**
* Accept a test set
*
* @param e a TestSetEvent value
*/
@Override
public void acceptTestSet(TestSetEvent e) {
Instances testSet = e.getTestSet();
DataSetEvent dse = new DataSetEvent(this, testSet);
acceptDataSet(dse);
}
/**
* Accept a data set
*
* @param e a DataSetEvent value
*/
@Override
public void acceptDataSet(DataSetEvent e) {
if (m_splitThread == null) {
final Instances dataSet = new Instances(e.getDataSet());
m_splitThread = new Thread() {
@Override
@SuppressWarnings("deprecation")
public void run() {
try {
dataSet.randomize(new Random(m_randomSeed));
int trainSize = (int) Math.round(dataSet.numInstances()
* m_trainPercentage / 100);
int testSize = dataSet.numInstances() - trainSize;
Instances train = new Instances(dataSet, 0, trainSize);
Instances test = new Instances(dataSet, trainSize, testSize);
TrainingSetEvent tse = new TrainingSetEvent(
TrainTestSplitMaker.this, train);
tse.m_setNumber = 1;
tse.m_maxSetNumber = 1;
if (m_splitThread != null) {
notifyTrainingSetProduced(tse);
}
// inform all test set listeners
TestSetEvent teste = new TestSetEvent(TrainTestSplitMaker.this,
test);
teste.m_setNumber = 1;
teste.m_maxSetNumber = 1;
if (m_splitThread != null) {
notifyTestSetProduced(teste);
} else {
if (m_logger != null) {
m_logger.logMessage("[TrainTestSplitMaker] "
+ statusMessagePrefix() + " Split has been canceled!");
m_logger.statusMessage(statusMessagePrefix() + "INTERRUPTED");
}
}
} catch (Exception ex) {
stop(); // stop all processing
if (m_logger != null) {
m_logger.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details)");
m_logger.logMessage("[TrainTestSplitMaker] "
+ statusMessagePrefix() + " problem during split creation. "
+ ex.getMessage());
}
ex.printStackTrace();
} finally {
if (isInterrupted()) {
if (m_logger != null) {
m_logger.logMessage("[TrainTestSplitMaker] "
+ statusMessagePrefix() + " Split has been canceled!");
m_logger.statusMessage(statusMessagePrefix() + "INTERRUPTED");
}
}
block(false);
}
}
};
m_splitThread.setPriority(Thread.MIN_PRIORITY);
m_splitThread.start();
// if (m_splitThread.isAlive()) {
block(true);
// }
m_splitThread = null;
}
}
/**
* Notify test set listeners that a test set is available
*
* @param tse a TestSetEvent value
*/
@SuppressWarnings("unchecked")
protected void notifyTestSetProduced(TestSetEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_testListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
if (m_splitThread == null) {
break;
}
// System.err.println("Notifying test listeners "
// +"(Train - test split maker)");
l.elementAt(i).acceptTestSet(tse);
}
}
}
/**
* Notify training set listeners that a training set is available
*
* @param tse a TrainingSetEvent value
*/
@SuppressWarnings("unchecked")
protected void notifyTrainingSetProduced(TrainingSetEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_trainingListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
if (m_splitThread == null) {
break;
}
// System.err.println("Notifying training listeners "
// +"(Train - test split fold maker)");
l.elementAt(i).acceptTrainingSet(tse);
}
}
}
/**
* Function used to stop code that calls acceptDataSet. This is needed as
* split is performed inside a separate thread of execution.
*
* @param tf a boolean value
*/
private synchronized void block(boolean tf) {
if (tf) {
try {
// make sure that the thread is still alive before blocking
if (m_splitThread.isAlive()) {
wait();
}
} catch (InterruptedException ex) {
}
} else {
notifyAll();
}
}
/**
* Stop processing
*/
@SuppressWarnings("deprecation")
@Override
public void stop() {
// tell the listenee (upstream bean) to stop
if (m_listenee instanceof BeanCommon) {
// System.err.println("Listener is BeanCommon");
((BeanCommon) m_listenee).stop();
}
// stop the split thread
if (m_splitThread != null) {
Thread temp = m_splitThread;
m_splitThread = null;
temp.interrupt();
temp.stop();
}
}
/**
* 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_splitThread != null);
}
/**
* Get list of user requests
*
* @return an Enumeration value
*/
@Override
public Enumeration enumerateRequests() {
Vector newVector = new Vector(0);
if (m_splitThread != null) {
newVector.addElement("Stop");
}
return newVector.elements();
}
/**
* Perform the named request
*
* @param request a String value
* @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 (TrainTestSplitMaker)");
}
}
/**
* 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 (m_listenee == null) {
return false;
}
if (m_listenee instanceof EventConstraints) {
if (((EventConstraints) m_listenee).eventGeneratable("dataSet")
|| ((EventConstraints) m_listenee).eventGeneratable("trainingSet")
|| ((EventConstraints) m_listenee).eventGeneratable("testSet")) {
return true;
} else {
return false;
}
}
return true;
}
private String statusMessagePrefix() {
return getCustomName() + "$" + hashCode() + "|";
}
}