org.jurvis.util
Class JvDefaultFileFetcher

java.lang.Object
  org.jurvis.util.JvDefaultFileFetcher

All Implemented Interfaces:

ActionListener, EventListener, JvFileFetcher

public class JvDefaultFileFetcher
extends Object
implements JvFileFetcher, ActionListener

Default JvFileFetcher that uses the standard Java I/O classes.

Author:

Neil W. Weber

Field Summary

protected int	bytes
protected JvCachedFile	cachedFile
protected long	contentLength
protected String	etag
protected long	expires
protected long	fetchStarted
protected long	lastModified
protected long	lastUpdate
protected JvDataTransferModel	transferModel

Constructor Summary

JvDefaultFileFetcher(JvCachedFile cachedFile)
Construct a new JvDefaultFileFetcher.

Method Summary

void	actionPerformed(ActionEvent e) Method called when the timer fires.
void	fetch(File dest, JvDataTransferModel transferModel) Fetch the file and notify transferModel of the progress.
long	getContentLength() Return the size of the downloaded file.
String	getEtag() Return the Etag that identifies the file.
long	getExpires() Return the date the cached file should expire.
long	getLastModified() Return the last modified date of the file.
protected InputStream	open()

Methods inherited from class java.lang.Object

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

Field Detail

transferModel

protected JvDataTransferModel transferModel

cachedFile

protected JvCachedFile cachedFile

contentLength

protected long contentLength

lastModified

protected long lastModified

expires

protected long expires

etag

protected String etag

fetchStarted

protected long fetchStarted

lastUpdate

protected long lastUpdate

bytes

protected int bytes

Constructor Detail

JvDefaultFileFetcher

public JvDefaultFileFetcher(JvCachedFile cachedFile)

Construct a new JvDefaultFileFetcher.

Parameters:

cachedFile - cache entry for the file to be fetched

Method Detail

getContentLength

public long getContentLength()

Return the size of the downloaded file.

Specified by:

getContentLength in interface JvFileFetcher

getLastModified

public long getLastModified()

Return the last modified date of the file.

Specified by:

getLastModified in interface JvFileFetcher

getExpires

public long getExpires()

Return the date the cached file should expire. Returns 0 if the file shouldn't be cached.

Specified by:

getExpires in interface JvFileFetcher

getEtag

public String getEtag()

Return the Etag that identifies the file. Returns null if one isn't available.

Specified by:

getEtag in interface JvFileFetcher

fetch

public void fetch(File dest,
                  JvDataTransferModel transferModel)
           throws IOException

Fetch the file and notify transferModel of the progress.

Specified by:

fetch in interface JvFileFetcher

Parameters:

dest - the cache entry

transferModel - object holding status of the transfer; may be null

Throws:

IOException

open

protected InputStream open()
                    throws IOException

Throws:

IOException

actionPerformed

public void actionPerformed(ActionEvent e)

Method called when the timer fires.

Specified by:

actionPerformed in interface ActionListener