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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 training set events
*/
private final Vector m_trainingListeners = new Vector();
/**
* Objects listening for test set events
*/
private final Vector m_testListeners = new Vector();
/**
* Objects listening for instance events
*/
private final Vector m_instanceListeners = new Vector();
/**
* Objects listening for data set events
*/
private final Vector m_dataListeners = new Vector();
/**
* The filter to use.
*/
private weka.filters.Filter m_Filter = new AllFilter();
/**
* Instance event object for passing on filtered instance streams
*/
private final InstanceEvent m_ie = new InstanceEvent(this);
/**
* Logging.
*/
private transient Logger m_log = null;
/**
* Counts incoming streamed instances.
*/
private transient int m_instanceCount;
/**
* Global info (if it exists) for the wrapped filter
*
* @return the global info
*/
public String globalInfo() {
return m_globalInfo;
}
public Filter() {
setLayout(new BorderLayout());
add(m_visual, BorderLayout.CENTER);
setFilter(m_Filter);
}
/**
* 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 filter to be wrapped by this bean
*
* @param c a weka.filters.Filter value
*/
public void setFilter(weka.filters.Filter c) {
boolean loadImages = true;
if (c.getClass().getName().compareTo(m_Filter.getClass().getName()) == 0) {
loadImages = false;
}
m_Filter = c;
String filterName = c.getClass().toString();
filterName = filterName.substring(filterName.indexOf('.') + 1,
filterName.length());
if (loadImages) {
if (m_Filter instanceof Visible) {
m_visual = ((Visible) m_Filter).getVisual();
} else {
if (!m_visual.loadIcons(BeanVisual.ICON_PATH + filterName + ".gif",
BeanVisual.ICON_PATH + filterName + "_animated.gif")) {
useDefaultVisual();
}
}
}
m_visual.setText(filterName.substring(filterName.lastIndexOf('.') + 1,
filterName.length()));
if (m_Filter instanceof LogWriter && m_log != null) {
((LogWriter) m_Filter).setLog(m_log);
}
if (!(m_Filter instanceof StreamableFilter)
&& (m_listenees.containsKey("instance"))) {
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix() + " WARNING : "
+ m_Filter.getClass().getName() + " is not an incremental filter");
m_log.statusMessage(statusMessagePrefix()
+ "WARNING: Not an incremental filter.");
}
}
// get global info
m_globalInfo = KnowledgeFlowApp.getGlobalInfo(m_Filter);
}
public weka.filters.Filter getFilter() {
return m_Filter;
}
/**
* Set the filter to be wrapped by this bean
*
* @param algorithm a weka.filters.Filter
* @exception IllegalArgumentException if an error occurs
*/
@Override
public void setWrappedAlgorithm(Object algorithm) {
if (!(algorithm instanceof weka.filters.Filter)) {
throw new IllegalArgumentException(algorithm.getClass() + " : incorrect "
+ "type of algorithm (Filter)");
}
setFilter((weka.filters.Filter) algorithm);
}
/**
* Get the filter wrapped by this bean
*
* @return an Object value
*/
@Override
public Object getWrappedAlgorithm() {
return getFilter();
}
/**
* Accept a training set
*
* @param e a TrainingSetEvent value
*/
@Override
public void acceptTrainingSet(TrainingSetEvent e) {
processTrainingOrDataSourceEvents(e);
}
private boolean m_structurePassedOn = false;
/**
* Accept an instance for processing by StreamableFilters only
*
* @param e an InstanceEvent value
*/
@Override
public void acceptInstance(InstanceEvent e) {
// to do!
if (m_filterThread != null) {
String messg = "[Filter] " + statusMessagePrefix()
+ " is currently batch processing!";
if (m_log != null) {
m_log.logMessage(messg);
m_log.statusMessage(statusMessagePrefix()
+ "WARNING: Filter is currently batch processing.");
} else {
System.err.println(messg);
}
return;
}
if (!(m_Filter instanceof StreamableFilter)) {
stop(); // stop all processing
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix() + " ERROR : "
+ m_Filter.getClass().getName()
+ "can't process streamed instances; can't continue");
m_log.statusMessage(statusMessagePrefix()
+ "ERROR: Can't process streamed instances; can't continue.");
}
return;
}
if (e.getStatus() == InstanceEvent.FORMAT_AVAILABLE) {
try {
m_instanceCount = 0;
// notifyInstanceListeners(e);
// Instances dataset = e.getInstance().dataset();
Instances dataset = e.getStructure();
if (m_Filter instanceof SupervisedFilter) {
// defualt to last column if no class is set
if (dataset.classIndex() < 0) {
dataset.setClassIndex(dataset.numAttributes() - 1);
}
}
// initialize filter
m_Filter.setInputFormat(dataset);
// attempt to determine post-filtering
// structure. If successful this can be passed on to instance
// listeners as a new FORMAT_AVAILABLE event.
m_structurePassedOn = false;
try {
if (m_Filter.isOutputFormatDefined()) {
// System.err.println("Filter - passing on output format...");
// System.err.println(m_Filter.getOutputFormat());
m_ie.setStructure(new Instances(m_Filter.getOutputFormat(), 0));
m_ie.m_formatNotificationOnly = e.m_formatNotificationOnly;
notifyInstanceListeners(m_ie);
m_structurePassedOn = true;
}
} catch (Exception ex) {
stop(); // stop all processing
if (m_log != null) {
m_log
.logMessage("[Filter] " + statusMessagePrefix()
+ " Error in obtaining post-filter structure. "
+ ex.getMessage());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details).");
} else {
System.err.println("[Filter] " + statusMessagePrefix()
+ " Error in obtaining post-filter structure");
}
}
} catch (Exception ex) {
ex.printStackTrace();
}
return;
}
if (e.getStatus() == InstanceEvent.BATCH_FINISHED
|| e.getInstance() == null) {
// get the last instance (if available)
try {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Stream finished.");
}
if (e.getInstance() != null) {
if (m_Filter.input(e.getInstance())) {
Instance filteredInstance = m_Filter.output();
if (filteredInstance != null) {
if (!m_structurePassedOn) {
// pass on the new structure first
m_ie.setStructure(new Instances(filteredInstance.dataset(), 0));
notifyInstanceListeners(m_ie);
m_structurePassedOn = true;
}
m_ie.setInstance(filteredInstance);
// if there are instances pending for output don't want to send
// a batch finisehd at this point...
// System.err.println("Filter - in batch finisehd...");
if (m_Filter.batchFinished() && m_Filter.numPendingOutput() > 0) {
m_ie.setStatus(InstanceEvent.INSTANCE_AVAILABLE);
} else {
m_ie.setStatus(e.getStatus());
}
notifyInstanceListeners(m_ie);
}
}
}
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
} catch (Exception ex) {
stop(); // stop all processing
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix()
+ ex.getMessage());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details).");
}
ex.printStackTrace();
}
// check for any pending instances that we might need to pass on
try {
if (m_Filter.batchFinished() && m_Filter.numPendingOutput() > 0) {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ "Passing on pending instances...");
}
Instance filteredInstance = m_Filter.output();
if (filteredInstance != null) {
if (!m_structurePassedOn) {
// pass on the new structure first
m_ie.setStructure((Instances) (new SerializedObject(
filteredInstance.dataset()).getObject()));
notifyInstanceListeners(m_ie);
m_structurePassedOn = true;
}
m_ie.setInstance(filteredInstance);
// TODO here is the problem I think
m_ie.setStatus(InstanceEvent.INSTANCE_AVAILABLE);
notifyInstanceListeners(m_ie);
}
while (m_Filter.numPendingOutput() > 0) {
filteredInstance = m_Filter.output();
if (filteredInstance.dataset().checkForStringAttributes()) {
for (int i = 0; i < filteredInstance.dataset().numAttributes(); i++) {
if (filteredInstance.dataset().attribute(i).isString()
&& !filteredInstance.isMissing(i)) {
String val = filteredInstance.stringValue(i);
m_ie.getStructure().attribute(i).setStringValue(val);
filteredInstance.setValue(i, 0);
}
}
}
filteredInstance.setDataset(m_ie.getStructure());
m_ie.setInstance(filteredInstance);
// System.err.println("Filter - sending pending...");
if (m_Filter.numPendingOutput() == 0) {
m_ie.setStatus(InstanceEvent.BATCH_FINISHED);
} else {
m_ie.setStatus(InstanceEvent.INSTANCE_AVAILABLE);
}
notifyInstanceListeners(m_ie);
}
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
}
} catch (Exception ex) {
stop(); // stop all processing
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix() + ex.toString());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details.");
}
ex.printStackTrace();
}
} else {
// pass instance through the filter
try {
if (!m_Filter.input(e.getInstance())) {
// System.err.println("Filter - inputing instance into filter...");
/*
* if (m_log != null) {
* m_log.logMessage("ERROR : filter not ready to output instance"); }
*/
// quietly return. Filter might be able to output some instances
// once the batch is finished.
return;
}
// collect output instance.
Instance filteredInstance = m_Filter.output();
if (filteredInstance == null) {
return;
}
m_instanceCount++;
if (!m_structurePassedOn) {
// pass on the new structure first
m_ie.setStructure(new Instances(filteredInstance.dataset(), 0));
notifyInstanceListeners(m_ie);
m_structurePassedOn = true;
}
filteredInstance.setDataset(m_ie.getStructure());
if (filteredInstance.dataset().checkForStringAttributes()) {
for (int i = 0; i < filteredInstance.dataset().numAttributes(); i++) {
if (filteredInstance.dataset().attribute(i).isString()
&& !filteredInstance.isMissing(i)) {
String val = filteredInstance.stringValue(i);
filteredInstance.dataset().attribute(i).setStringValue(val);
filteredInstance.setValue(i, 0);
}
}
}
m_ie.setInstance(filteredInstance);
m_ie.setStatus(e.getStatus());
if (m_log != null && (m_instanceCount % 10000 == 0)) {
m_log.statusMessage(statusMessagePrefix() + "Received "
+ m_instanceCount + " instances.");
}
notifyInstanceListeners(m_ie);
} catch (Exception ex) {
stop(); // stop all processing
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix() + ex.toString());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details).");
}
ex.printStackTrace();
}
}
}
private void processTrainingOrDataSourceEvents(final EventObject e) {
boolean structureOnly = false;
if (e instanceof DataSetEvent) {
structureOnly = ((DataSetEvent) e).isStructureOnly();
if (structureOnly) {
notifyDataOrTrainingListeners(e);
}
}
if (e instanceof TrainingSetEvent) {
structureOnly = ((TrainingSetEvent) e).isStructureOnly();
if (structureOnly) {
notifyDataOrTrainingListeners(e);
}
}
if (structureOnly && !(m_Filter instanceof StreamableFilter)) {
return; // nothing can be done
}
if (m_filterThread == null) {
try {
if (m_state == IDLE) {
synchronized (this) {
m_state = FILTERING_TRAINING;
}
m_trainingSet = (e instanceof TrainingSetEvent) ? ((TrainingSetEvent) e)
.getTrainingSet() : ((DataSetEvent) e).getDataSet();
// final String oldText = m_visual.getText();
m_filterThread = new Thread() {
@SuppressWarnings("deprecation")
@Override
public void run() {
try {
if (m_trainingSet != null) {
m_visual.setAnimated();
// m_visual.setText("Filtering training data...");
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ "Filtering training data ("
+ m_trainingSet.relationName() + ")");
}
m_Filter.setInputFormat(m_trainingSet);
Instances filteredData = weka.filters.Filter.useFilter(
m_trainingSet, m_Filter);
// m_visual.setText(oldText);
m_visual.setStatic();
EventObject ne;
if (e instanceof TrainingSetEvent) {
ne = new TrainingSetEvent(weka.gui.beans.Filter.this,
filteredData);
((TrainingSetEvent) ne).m_setNumber = ((TrainingSetEvent) e).m_setNumber;
((TrainingSetEvent) ne).m_maxSetNumber = ((TrainingSetEvent) e).m_maxSetNumber;
} else {
ne = new DataSetEvent(weka.gui.beans.Filter.this,
filteredData);
}
notifyDataOrTrainingListeners(ne);
}
} catch (Exception ex) {
ex.printStackTrace();
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix()
+ ex.getMessage());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details).");
// m_log.statusMessage("Problem filtering: see log for details.");
}
Filter.this.stop(); // stop all processing
} finally {
// m_visual.setText(oldText);
m_visual.setStatic();
m_state = IDLE;
if (isInterrupted()) {
m_trainingSet = null;
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix()
+ " training set interrupted!");
m_log.statusMessage(statusMessagePrefix() + "INTERRUPTED");
}
} else {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
}
block(false);
m_filterThread = null;
}
}
};
m_filterThread.setPriority(Thread.MIN_PRIORITY);
m_filterThread.start();
block(true);
m_filterThread = null;
m_state = IDLE;
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
/**
* Accept a test set
*
* @param e a TestSetEvent value
*/
@Override
public void acceptTestSet(final TestSetEvent e) {
if (e.isStructureOnly()) {
notifyTestListeners(e);
}
if (m_trainingSet != null && m_trainingSet.equalHeaders(e.getTestSet())
&& m_filterThread == null) {
try {
if (m_state == IDLE) {
m_state = FILTERING_TEST;
}
m_testingSet = e.getTestSet();
// final String oldText = m_visual.getText();
m_filterThread = new Thread() {
@SuppressWarnings("deprecation")
@Override
public void run() {
try {
if (m_testingSet != null) {
m_visual.setAnimated();
// m_visual.setText("Filtering test data...");
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix()
+ "Filtering test data (" + m_testingSet.relationName()
+ ")");
}
Instances filteredTest = weka.filters.Filter.useFilter(
m_testingSet, m_Filter);
// m_visual.setText(oldText);
m_visual.setStatic();
TestSetEvent ne = new TestSetEvent(weka.gui.beans.Filter.this,
filteredTest);
ne.m_setNumber = e.m_setNumber;
ne.m_maxSetNumber = e.m_maxSetNumber;
notifyTestListeners(ne);
}
} catch (Exception ex) {
ex.printStackTrace();
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix()
+ ex.getMessage());
m_log.statusMessage(statusMessagePrefix()
+ "ERROR (See log for details).");
}
Filter.this.stop();
} finally {
// m_visual.setText(oldText);
m_visual.setStatic();
m_state = IDLE;
if (isInterrupted()) {
m_trainingSet = null;
if (m_log != null) {
m_log.logMessage("[Filter] " + statusMessagePrefix()
+ " test set interrupted!");
m_log.statusMessage(statusMessagePrefix() + "INTERRUPTED");
// m_log.statusMessage("OK");
}
} else {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
}
block(false);
m_filterThread = null;
}
}
};
m_filterThread.setPriority(Thread.MIN_PRIORITY);
m_filterThread.start();
block(true);
m_filterThread = null;
m_state = IDLE;
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
/**
* Accept a data set
*
* @param e a DataSetEvent value
*/
@Override
public void acceptDataSet(DataSetEvent e) {
processTrainingOrDataSourceEvents(e);
}
/**
* Set the visual appearance of this bean
*
* @param newVisual a BeanVisual value
*/
@Override
public void setVisual(BeanVisual newVisual) {
m_visual = newVisual;
}
/**
* Get the visual appearance of this bean
*
* @return a BeanVisual value
*/
@Override
public BeanVisual getVisual() {
return m_visual;
}
/**
* Use the default visual appearance
*/
@Override
public void useDefaultVisual() {
m_visual.loadIcons(BeanVisual.ICON_PATH + "DefaultFilter.gif",
BeanVisual.ICON_PATH + "DefaultFilter_animated.gif");
}
/**
* Add a training set listener
*
* @param tsl a TrainingSetListener value
*/
@Override
public synchronized void addTrainingSetListener(TrainingSetListener tsl) {
m_trainingListeners.addElement(tsl);
}
/**
* Remove a training set listener
*
* @param tsl a TrainingSetListener value
*/
@Override
public synchronized void removeTrainingSetListener(TrainingSetListener tsl) {
m_trainingListeners.removeElement(tsl);
}
/**
* Add a test set listener
*
* @param tsl a TestSetListener value
*/
@Override
public synchronized void addTestSetListener(TestSetListener tsl) {
m_testListeners.addElement(tsl);
}
/**
* Remove a test set listener
*
* @param tsl a TestSetListener value
*/
@Override
public synchronized void removeTestSetListener(TestSetListener tsl) {
m_testListeners.removeElement(tsl);
}
/**
* Add a data source listener
*
* @param dsl a DataSourceListener value
*/
@Override
public synchronized void addDataSourceListener(DataSourceListener dsl) {
m_dataListeners.addElement(dsl);
}
/**
* Remove a data source listener
*
* @param dsl a DataSourceListener value
*/
@Override
public synchronized void removeDataSourceListener(DataSourceListener dsl) {
m_dataListeners.remove(dsl);
}
/**
* Add an instance listener
*
* @param tsl an InstanceListener value
*/
@Override
public synchronized void addInstanceListener(InstanceListener tsl) {
m_instanceListeners.addElement(tsl);
}
/**
* Remove an instance listener
*
* @param tsl an InstanceListener value
*/
@Override
public synchronized void removeInstanceListener(InstanceListener tsl) {
m_instanceListeners.removeElement(tsl);
}
/**
* 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) {
}
private void notifyDataOrTrainingListeners(EventObject ce) {
Vector l;
synchronized (this) {
l = (ce instanceof TrainingSetEvent) ? (Vector) m_trainingListeners
.clone() : (Vector) m_dataListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
if (ce instanceof TrainingSetEvent) {
((TrainingSetListener) l.elementAt(i))
.acceptTrainingSet((TrainingSetEvent) ce);
} else {
((DataSourceListener) l.elementAt(i))
.acceptDataSet((DataSetEvent) ce);
}
}
}
}
@SuppressWarnings("unchecked")
private void notifyTestListeners(TestSetEvent ce) {
Vector l;
synchronized (this) {
l = (Vector) m_testListeners.clone();
}
if (l.size() > 0) {
for (int i = 0; i < l.size(); i++) {
l.elementAt(i).acceptTestSet(ce);
}
}
}
@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 "
// +"(Filter)");
l.elementAt(i).acceptInstance(tse);
}
}
}
/**
* Returns true if, at this time, the object will accept a connection with
* respect 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 (m_listenees.containsKey(eventName)) {
return false;
}
/*
* reject a test event if we don't have a training or data set event if
* (eventName.compareTo("testSet") == 0) { if
* (!m_listenees.containsKey("trainingSet") &&
* !m_listenees.containsKey("dataSet")) { return false; } }
*/
// will need to reject train/test listener if we have a
// data source listener and vis versa
if (m_listenees.containsKey("dataSet")
&& (eventName.compareTo("trainingSet") == 0
|| eventName.compareTo("testSet") == 0 || eventName
.compareTo("instance") == 0)) {
return false;
}
if ((m_listenees.containsKey("trainingSet") || m_listenees
.containsKey("testSet"))
&& (eventName.compareTo("dataSet") == 0 || eventName
.compareTo("instance") == 0)) {
return false;
}
if (m_listenees.containsKey("instance")
&& (eventName.compareTo("trainingSet") == 0
|| eventName.compareTo("testSet") == 0 || eventName
.compareTo("dataSet") == 0)) {
return false;
}
// reject an instance event connection if our filter isn't
// streamable
if (eventName.compareTo("instance") == 0
&& !(m_Filter instanceof StreamableFilter)) {
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
* @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);
if (m_Filter instanceof ConnectionNotificationConsumer) {
((ConnectionNotificationConsumer) m_Filter).connectionNotification(
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) {
if (m_Filter instanceof ConnectionNotificationConsumer) {
((ConnectionNotificationConsumer) m_Filter).disconnectionNotification(
eventName, source);
}
m_listenees.remove(eventName);
}
/**
* Function used to stop code that calls acceptTrainingSet, acceptTestSet, or
* acceptDataSet. This is needed as filtering 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_filterThread.isAlive() && m_state != IDLE) {
wait();
}
} catch (InterruptedException ex) {
}
} else {
notifyAll();
}
}
/**
* Stop all action if possible
*/
@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 filter thread
if (m_filterThread != null) {
m_filterThread.interrupt();
m_filterThread.stop();
m_filterThread = null;
m_visual.setStatic();
}
}
/**
* 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_filterThread != null);
}
/**
* Set a logger
*
* @param logger a Logger value
*/
@Override
public void setLog(Logger logger) {
m_log = logger;
if (m_Filter != null && m_Filter instanceof LogWriter) {
((LogWriter) m_Filter).setLog(m_log);
}
}
/**
* Return an enumeration of user requests
*
* @return an Enumeration value
*/
@Override
public Enumeration enumerateRequests() {
Vector newVector = new Vector(0);
if (m_filterThread != 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 (Filter)");
}
}
/**
* Returns true, if at the current time, the named event could be generated.
* Assumes that supplied event names are names of events 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.equals("configuration") && m_Filter != null) {
return true;
}
// can't generate the named even if we are not receiving it as an
// input!
if (!m_listenees.containsKey(eventName)) {
return false;
}
Object source = m_listenees.get(eventName);
if (source instanceof EventConstraints) {
if (!((EventConstraints) source).eventGeneratable(eventName)) {
return false;
}
}
if (eventName.compareTo("instance") == 0) {
if (!(m_Filter instanceof StreamableFilter)) {
return false;
}
}
return true;
}
private String statusMessagePrefix() {
return getCustomName()
+ "$"
+ hashCode()
+ "|"
+ ((m_Filter instanceof OptionHandler && Utils.joinOptions(
((OptionHandler) m_Filter).getOptions()).length() > 0) ? Utils
.joinOptions(((OptionHandler) m_Filter).getOptions()) + "|" : "");
}
}