nl.knowledgeplaza.util
Class ProgressListener

java.lang.Object
  nl.knowledgeplaza.util.ProgressListener

Direct Known Subclasses:

ProgressListener.ConsoleProgressListener

public abstract class ProgressListener
extends Object

A class to provide progress feedback. The class does not dictate what the listened to process will provide for feedback. It may or may not class begin, done or init. That depends on the implementation in the process that is monitored. Progress is called always, but it is undefined how often, that -again- depends on the implementation in the process that is monitored. An actual progress listener should extend this class. It can override the neccesary methods and do with the information what is appropriate for the context. For example: - the information can be printed on System.out (see the default progressListenerConsole in this class) - in a Swing application the information can be forwarded to a ProgressMonitor component (see the default ProgressMonitor.progressListener). This is implemented as an abstract class and not an interface, so that future changes will not required existing code to be modified.

Nested Class Summary

static class

ProgressListener.ConsoleProgressListener a default ProgressListener that simply writes to the console

Field Summary

static ProgressListener

progressListenerConsole

Constructor Summary

ProgressListener()

Method Summary

void	begin()
boolean	cancel()
void	done()
void	init(long min, long max)
void	progress(long current)
abstract void	progress(long current, String info)
void	reset(long min, long max)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

progressListenerConsole

public static ProgressListener progressListenerConsole

Constructor Detail

ProgressListener

public ProgressListener()

Method Detail

init

public void init(long min,
                 long max)

reset

public void reset(long min,
                  long max)

begin

public void begin()

progress

public abstract void progress(long current,
                              String info)

progress

public void progress(long current)

done

public void done()

cancel

public boolean cancel()