de.cismet.cismap.commons.demo

Class ProgressMonitoredDataTransfer

java.lang.Object

java.util.Observable

de.cismet.cismap.commons.demo.ProgressMonitoredDataTransfer

All Implemented Interfaces:

ActionListener, Runnable, EventListener

public class ProgressMonitoredDataTransfer
extends Observable
implements Runnable, ActionListener

Transfer data from one stream to another, providing a Swing ProgressMonitor to handle notifying the user and allowing the user to cancel the transfer. The progress updates every half-second.

Objects of this class also act as Observables, updating their observers after each block of data is transfered, and again at the end of the transfer.

Version:

$Revision$, $Date$

Field Summary

Fields

Modifier and Type	Field and Description
static int	BUFSIZ
static int	DELAY

Constructor Summary

Constructors

Constructor and Description
ProgressMonitoredDataTransfer(Component par, InputStream from, OutputStream to, int maxtransfer, Object message, boolean close) Create a progress monitored data transfer.

Method Summary

Modifier and Type	Method and Description
void	actionPerformed(ActionEvent e) Handle timer actions.
int	getCurrent() Retrieve the value of current, which is the number of bytes transferred so far.
void	handleProblem(String msg) Override this to handle problems differently.
boolean	isDone() Check whether the task is done yet.
void	run()
void	waitForDone() Wait for the task to be done.

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Field Detail

DELAY

public static final int DELAY

See Also:

Constant Field Values

BUFSIZ

public static final int BUFSIZ

See Also:

Constant Field Values

Constructor Detail

ProgressMonitoredDataTransfer

public ProgressMonitoredDataTransfer(Component par,
                                     InputStream from,
                                     OutputStream to,
                                     int maxtransfer,
                                     Object message,
                                     boolean close)

Create a progress monitored data transfer.

Parameters:

par - Parent Swing Window or Frame

from - Stream to read data from

to - Stream to write data out to

maxtransfer - Maximum number of bytes we expect to transfer

message - Progress monitor message object (usually String)

close - If set, then close the streams at end of transfer

Method Detail

actionPerformed

public void actionPerformed(ActionEvent e)

Handle timer actions.

Specified by:

actionPerformed in interface ActionListener

Parameters:

e - DOCUMENT ME!

handleProblem

public void handleProblem(String msg)

Override this to handle problems differently. Note that this method may or may not be called from the Swing event thread. The default implementation just prints to System.err.

Parameters:

msg - Message about the problem

getCurrent

public int getCurrent()

Retrieve the value of current, which is the number of bytes transferred so far.

Returns:

number of bytes transfered

isDone

public boolean isDone()

Check whether the task is done yet.

Returns:

DOCUMENT ME!

waitForDone

public void waitForDone()

Wait for the task to be done. It is probably not a good idea to use this in Swing.

run

public final void run()

Specified by:

run in interface Runnable