org.jurvis.util
Class JvFileCache

java.lang.Object
  org.jurvis.util.JvFileCache

public class JvFileCache
extends Object

Maintains a cache of files on disk.

Author:

Neil W. Weber

Field Summary

protected File

cacheDir The local directory holding the cached files.

Constructor Summary

JvFileCache(String dir)
Construct a new JvFileCache using the given directory as the local cache directory.

Method Summary

File	get(URL url, JvDataTransferModel transferModel) Get the file at the given URL.
static void	main(String[] args)
void	setCacheDir(String dirname) Set the name of the directory to store the cached files

Methods inherited from class java.lang.Object

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

Field Detail

cacheDir

protected File cacheDir

The local directory holding the cached files.

Constructor Detail

JvFileCache

public JvFileCache(String dir)
            throws IOException

Construct a new JvFileCache using the given directory as the local cache directory.

Parameters:

dir - the name of the directory to store the cached files

Throws:

IOException

Method Detail

setCacheDir

public void setCacheDir(String dirname)
                 throws IOException

Set the name of the directory to store the cached files

Parameters:

dirname - the name of the cache directory

Throws:

IOException

get

public File get(URL url,
                JvDataTransferModel transferModel)
         throws IOException

Get the file at the given URL. If the file is already in the cache, use it. Otherwise, download the file and store it in the cache.

Parameters:

url - the URL of the desired file

transferModel - model containing the state of the transfer

Returns:

the downloaded file

Throws:

IOException

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception