wt.clients.dndMicroApplet
Class ContentDownloader

java.lang.Object
  wt.clients.dndMicroApplet.ContentDownloader

All Implemented Interfaces:

Runnable

final class ContentDownloader

extends Object

implements Runnable

Runnable which downloads from a specified URL to a specified file and uses a specified applet to update the user as to progress of the operation. Intended for usage from background threads.

Note that file download progress dialogs are quite doable instead of using showStatus() as is done currently. The current approach was selected for simplicity, unobtrusiveness, and small size of this class.

Field Summary

private Applet	applet Applet to show status through and as a source of Locale
private static int	BUFFER_SIZE Size of buffer used for download
private File	newFile Newly created file to download to
private ResourceBundle	rb Resource bundle to use for localization
private static char	REPL_CHAR Safe replacement character for ' in MessageFormat strings.
private URL	sourceURL URL to download from

Constructor Summary

(package private)

ContentDownloader(Applet applet, URL sourceURL, File newFile) Takes applet to allow use of showStatus() and getLocale(), a URL to download from, and a newly created file to download to.

Method Summary

private void	delete(File file) Delete file via FileOperation
private FileOutputStream	getFileOutputStream(File file) Get file output stream for file via FileOperation
void	run() Workhorse method.

Methods inherited from class java.lang.Object

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

Field Detail

REPL_CHAR

private static final char REPL_CHAR

Safe replacement character for ' in MessageFormat strings. This is as per (and extracted from) wt.util.WTMessage.

See Also:

Constant Field Values

BUFFER_SIZE

private static final int BUFFER_SIZE

Size of buffer used for download

See Also:

Constant Field Values

applet

private Applet applet

Applet to show status through and as a source of Locale

sourceURL

private URL sourceURL

URL to download from

newFile

private File newFile

Newly created file to download to

rb

private ResourceBundle rb

Resource bundle to use for localization

Constructor Detail

ContentDownloader

ContentDownloader(Applet applet,
                  URL sourceURL,
                  File newFile)

Takes applet to allow use of showStatus() and getLocale(), a URL to download from, and a newly created file to download to.

Method Detail

run

public void run()

Workhorse method.

Specified by:

run in interface Runnable

getFileOutputStream

private FileOutputStream getFileOutputStream(File file)
                                      throws Exception

Get file output stream for file via FileOperation

Throws:

Exception

delete

private void delete(File file)

Delete file via FileOperation