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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_trainingListeners = new Vector();
private final Vector m_testListeners = new Vector();
private final Vector m_dataListeners = new Vector();
private final Vector m_instanceListeners = new Vector();
private final Vector m_dataFormatListeners = new Vector();
protected transient weka.gui.Logger m_logger = null;
protected BeanVisual m_visual = new BeanVisual("ClassAssigner",
BeanVisual.ICON_PATH + "ClassAssigner.gif", BeanVisual.ICON_PATH
+ "ClassAssigner_animated.gif");
/**
* Global info for this bean
*
* @return a String value
*/
public String globalInfo() {
return "Designate which column is to be considered the class column "
+ "in incoming data.";
}
public ClassAssigner() {
setLayout(new BorderLayout());
add(m_visual, BorderLayout.CENTER);
}
/**
* 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();
}
/**
* Tool tip text for this property
*
* @return a String value
*/
public String classColumnTipText() {
return "Specify the number of the column that contains the class attribute";
}
private Instances getUpstreamStructure() {
if (m_dataProvider != null && m_dataProvider instanceof StructureProducer) {
return ((StructureProducer) m_dataProvider).getStructure("dataSet");
}
if (m_trainingProvider != null
&& m_trainingProvider instanceof StructureProducer) {
return ((StructureProducer) m_trainingProvider)
.getStructure("trainingSet");
}
if (m_testProvider != null && m_testProvider instanceof StructureProducer) {
return ((StructureProducer) m_testProvider).getStructure("testSet");
}
if (m_instanceProvider != null
&& m_instanceProvider instanceof StructureProducer) {
return ((StructureProducer) m_instanceProvider).getStructure("instance");
}
return null;
}
/**
* 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) {
if (!eventName.equals("trainingSet") && !eventName.equals("testSet")
&& !eventName.equals("dataSet") && !eventName.equals("instance")) {
return null;
}
if (m_trainingProvider == null && m_testProvider == null
&& m_dataProvider == null && m_instanceProvider == null) {
return null;
}
if (eventName.equals("dataSet") && m_dataListeners.size() == 0) {
// downstream has asked for the structure of something that we
// are not producing at the moment
return null;
}
if (eventName.equals("trainingSet") && m_trainingListeners.size() == 0) {
// downstream has asked for the structure of something that we
// are not producing at the moment
return null;
}
if (eventName.equals("testSet") && m_testListeners.size() == 0) {
// downstream has asked for the structure of something that we
// are not producing at the moment
return null;
}
if (eventName.equals("instance") && m_instanceListeners.size() == 0) {
// downstream has asked for the structure of something that we
// are not producing at the moment
return null;
}
if (m_connectedFormat == null) {
m_connectedFormat = getUpstreamStructure();
}
if (m_connectedFormat != null) {
assignClass(m_connectedFormat);
}
return m_connectedFormat;
}
/**
* Returns the structure of the incoming instances (if any)
*
* @return an Instances value
*/
public Instances getConnectedFormat() {
// loaders will push instances format to us
// when the user makes configuration changes
// to the loader in the gui. However, if a fully
// configured flow is loaded then we won't get
// this information pushed to us until the
// flow is run. In this case we want to pull
// it (if possible) from upstream steps so
// that our customizer can provide the nice
// UI with the drop down box of class names.
if (m_connectedFormat == null) {
// try and pull the incoming structure
// from the upstream step (if possible)
m_connectedFormat = getUpstreamStructure();
}
return m_connectedFormat;
}
public void setClassColumn(String col) {
m_classColumn = col;
if (m_connectedFormat != null) {
assignClass(m_connectedFormat);
}
}
public String getClassColumn() {
return m_classColumn;
}
@Override
public void acceptDataSet(DataSetEvent e) {
Instances dataSet = e.getDataSet();
assignClass(dataSet);
notifyDataListeners(e);
if (e.isStructureOnly()) {
m_connectedFormat = e.getDataSet();
// tell any listening customizers (or other
notifyDataFormatListeners();
}
}
@Override
public void acceptTrainingSet(TrainingSetEvent e) {
Instances trainingSet = e.getTrainingSet();
assignClass(trainingSet);
notifyTrainingListeners(e);
if (e.isStructureOnly()) {
m_connectedFormat = e.getTrainingSet();
// tell any listening customizers (or other
notifyDataFormatListeners();
}
}
@Override
public void acceptTestSet(TestSetEvent e) {
Instances testSet = e.getTestSet();
assignClass(testSet);
notifyTestListeners(e);
if (e.isStructureOnly()) {
m_connectedFormat = e.getTestSet();
// tell any listening customizers (or other
notifyDataFormatListeners();
}
}
@Override
public void acceptInstance(InstanceEvent e) {
if (e.getStatus() == InstanceEvent.FORMAT_AVAILABLE) {
// Instances dataSet = e.getInstance().dataset();
m_connectedFormat = e.getStructure();
// System.err.println("Assigning class column...");
assignClass(m_connectedFormat);
notifyInstanceListeners(e);
// tell any listening customizers (or other interested parties)
System.err.println("Notifying customizer...");
notifyDataFormatListeners();
} else {
// Instances dataSet = e.getInstance().dataset();
// assignClass(dataSet);
notifyInstanceListeners(e);
}
}
private void assignClass(Instances dataSet) {
int classCol = -1;
if (m_classColumn.trim().toLowerCase().compareTo("last") == 0
|| m_classColumn.equalsIgnoreCase("/last")) {
dataSet.setClassIndex(dataSet.numAttributes() - 1);
} else if (m_classColumn.trim().toLowerCase().compareTo("first") == 0
|| m_classColumn.equalsIgnoreCase("/first")) {
dataSet.setClassIndex(0);
} else {
// try to look up the class attribute as a string
Attribute classAtt = dataSet.attribute(m_classColumn.trim());
if (classAtt != null) {
dataSet.setClass(classAtt);
} else {
// parse it as a number
try {
classCol = Integer.parseInt(m_classColumn.trim()) - 1;
} catch (NumberFormatException ex) {
if (m_logger != null) {
m_logger
.logMessage("Warning : can't parse '"
+ m_classColumn.trim()
+ "' as a number "
+ " or find it as an attribute in the incoming data (ClassAssigner)");
}
}
if (/* classCol < 0 || */classCol > dataSet.numAttributes() - 1) {
if (m_logger != null) {
m_logger.logMessage("Class column outside range of data "
+ "(ClassAssigner)");
}
} else {
dataSet.setClassIndex(classCol);
}
}
}
}
@SuppressWarnings("unchecked")
protected void notifyTestListeners(TestSetEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_testListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
System.err.println("Notifying test listeners " + "(ClassAssigner)");
l.elementAt(i).acceptTestSet(tse);
}
}
}
@SuppressWarnings("unchecked")
protected void notifyTrainingListeners(TrainingSetEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_trainingListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
System.err.println("Notifying training listeners " + "(ClassAssigner)");
l.elementAt(i).acceptTrainingSet(tse);
}
}
}
@SuppressWarnings("unchecked")
protected void notifyDataListeners(DataSetEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_dataListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
System.err.println("Notifying data listeners " + "(ClassAssigner)");
l.elementAt(i).acceptDataSet(tse);
}
}
}
@SuppressWarnings("unchecked")
protected void notifyInstanceListeners(InstanceEvent tse) {
Vector l;
synchronized (this) {
l = (Vector) m_instanceListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
// System.err.println("Notifying instance listeners "
// +"(ClassAssigner)");
l.elementAt(i).acceptInstance(tse);
}
}
}
@SuppressWarnings("unchecked")
protected void notifyDataFormatListeners() {
Vector l;
synchronized (this) {
l = (Vector) m_dataFormatListeners.clone();
}
if (l.size() > 0) {
DataSetEvent dse = new DataSetEvent(this, m_connectedFormat);
for (int i = 0; i < l.size(); i++) {
// System.err.println("Notifying instance listeners "
// +"(ClassAssigner)");
l.elementAt(i).newDataFormat(dse);
}
}
}
@Override
public synchronized void addInstanceListener(InstanceListener tsl) {
m_instanceListeners.addElement(tsl);
if (m_connectedFormat != null) {
InstanceEvent e = new InstanceEvent(this, m_connectedFormat);
tsl.acceptInstance(e);
}
}
@Override
public synchronized void removeInstanceListener(InstanceListener tsl) {
m_instanceListeners.removeElement(tsl);
}
@Override
public synchronized void addDataSourceListener(DataSourceListener tsl) {
m_dataListeners.addElement(tsl);
// pass on any format that we might know about
if (m_connectedFormat != null) {
DataSetEvent e = new DataSetEvent(this, m_connectedFormat);
tsl.acceptDataSet(e);
}
}
@Override
public synchronized void removeDataSourceListener(DataSourceListener tsl) {
m_dataListeners.removeElement(tsl);
}
@Override
public synchronized void addTrainingSetListener(TrainingSetListener tsl) {
m_trainingListeners.addElement(tsl);
// pass on any format that we might know about
if (m_connectedFormat != null) {
TrainingSetEvent e = new TrainingSetEvent(this, m_connectedFormat);
tsl.acceptTrainingSet(e);
}
}
@Override
public synchronized void removeTrainingSetListener(TrainingSetListener tsl) {
m_trainingListeners.removeElement(tsl);
}
@Override
public synchronized void addTestSetListener(TestSetListener tsl) {
m_testListeners.addElement(tsl);
// pass on any format that we might know about
if (m_connectedFormat != null) {
TestSetEvent e = new TestSetEvent(this, m_connectedFormat);
tsl.acceptTestSet(e);
}
}
@Override
public synchronized void removeTestSetListener(TestSetListener tsl) {
m_testListeners.removeElement(tsl);
}
public synchronized void addDataFormatListener(DataFormatListener dfl) {
m_dataFormatListeners.addElement(dfl);
}
public synchronized void removeDataFormatListener(DataFormatListener dfl) {
m_dataFormatListeners.removeElement(dfl);
}
@Override
public void setVisual(BeanVisual newVisual) {
m_visual = newVisual;
}
@Override
public BeanVisual getVisual() {
return m_visual;
}
@Override
public void useDefaultVisual() {
m_visual.loadIcons(BeanVisual.ICON_PATH + "ClassAssigner.gif",
BeanVisual.ICON_PATH + "ClassAssigner_animated.gif");
}
/**
* Returns true if, at this time, the object will accept a connection
* according to the supplied event name
*
* @param eventName the event
* @return true if the object will accept a connection
*/
@Override
public boolean connectionAllowed(String eventName) {
if (eventName.compareTo("trainingSet") == 0
&& (m_trainingProvider != null || m_dataProvider != null || m_instanceProvider != null)) {
return false;
}
if (eventName.compareTo("testSet") == 0 && m_testProvider != null) {
return false;
}
if (eventName.compareTo("instance") == 0 && m_instanceProvider != null
|| m_trainingProvider != null || m_dataProvider != null) {
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 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 connectionNotification(String eventName,
Object source) {
if (connectionAllowed(eventName)) {
if (eventName.compareTo("trainingSet") == 0) {
m_trainingProvider = source;
} else if (eventName.compareTo("testSet") == 0) {
m_testProvider = source;
} else if (eventName.compareTo("dataSet") == 0) {
m_dataProvider = source;
} else if (eventName.compareTo("instance") == 0) {
m_instanceProvider = source;
}
m_connectedFormat = null;
}
}
/**
* 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) {
if (eventName.compareTo("trainingSet") == 0) {
if (m_trainingProvider == source) {
m_trainingProvider = null;
}
}
if (eventName.compareTo("testSet") == 0) {
if (m_testProvider == source) {
m_testProvider = null;
}
}
if (eventName.compareTo("dataSet") == 0) {
if (m_dataProvider == source) {
m_dataProvider = null;
}
}
if (eventName.compareTo("instance") == 0) {
if (m_instanceProvider == source) {
m_instanceProvider = null;
}
}
m_connectedFormat = null;
}
@Override
public void setLog(weka.gui.Logger logger) {
m_logger = logger;
}
@Override
public void stop() {
// Pass on to upstream beans
if (m_trainingProvider != null && m_trainingProvider instanceof BeanCommon) {
((BeanCommon) m_trainingProvider).stop();
}
if (m_testProvider != null && m_testProvider instanceof BeanCommon) {
((BeanCommon) m_testProvider).stop();
}
if (m_dataProvider != null && m_dataProvider instanceof BeanCommon) {
((BeanCommon) m_dataProvider).stop();
}
if (m_instanceProvider != null && m_instanceProvider instanceof BeanCommon) {
((BeanCommon) m_instanceProvider).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 false;
}
/**
* 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("trainingSet") == 0) {
if (m_trainingProvider == null) {
return false;
} else {
if (m_trainingProvider instanceof EventConstraints) {
if (!((EventConstraints) m_trainingProvider)
.eventGeneratable("trainingSet")) {
return false;
}
}
}
}
if (eventName.compareTo("dataSet") == 0) {
if (m_dataProvider == null) {
if (m_instanceProvider == null) {
m_connectedFormat = null;
notifyDataFormatListeners();
}
return false;
} else {
if (m_dataProvider instanceof EventConstraints) {
if (!((EventConstraints) m_dataProvider).eventGeneratable("dataSet")) {
m_connectedFormat = null;
notifyDataFormatListeners();
return false;
}
}
}
}
if (eventName.compareTo("instance") == 0) {
if (m_instanceProvider == null) {
if (m_dataProvider == null) {
m_connectedFormat = null;
notifyDataFormatListeners();
}
return false;
} else {
if (m_instanceProvider instanceof EventConstraints) {
if (!((EventConstraints) m_instanceProvider)
.eventGeneratable("instance")) {
m_connectedFormat = null;
notifyDataFormatListeners();
return false;
}
}
}
}
if (eventName.compareTo("testSet") == 0) {
if (m_testProvider == null) {
return false;
} else {
if (m_testProvider instanceof EventConstraints) {
if (!((EventConstraints) m_testProvider).eventGeneratable("testSet")) {
return false;
}
}
}
}
return true;
}
}
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