Class ImageTileDiskCache

java.lang.Object

VASSAL.tools.image.tilecache.ImageTileDiskCache

All Implemented Interfaces:

Closeable, AutoCloseable, ImageTileSource, FileStore

public class ImageTileDiskCache
extends Object
implements ImageTileSource, FileStore

An on-disk ImageTileSource and FileStore for image tiles.

Since:

3.2.0

Author:

Joel Uckelman

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	cpath

Constructor Summary

Constructors

Constructor	Description
ImageTileDiskCache(String cpath)	Creates an ImageTileDiskCache.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes the store.
boolean	contains(String path)	Queries whether a file exists in the store.
List<String>	getFiles()	Gets the list of files in the store.
List<String>	getFiles(String root)	Gets the list of files under a given directory of the store.
InputStream	getInputStream(String path)	Gets an InputStream to read from the given file.
long	getMTime(String path)	Gets the modification time of a file in the store, in milliseconds since the epoch.
long	getSize(String path)	Gets the size of a file in the store, in bytes.
BufferedImage	getTile(String name, int tileX, int tileY, double scale)	Gets an image tile.
Dimension	getTileSize(String name, int tileX, int tileY, double scale)	Gets the size of an image tile.
boolean	isClosed()	Checks whether the store is closed.
boolean	tileExists(String name, int tileX, int tileY, double scale)	Checks whether an image tile exists.

Methods inherited from class java.lang.Object

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

Field Details

cpath

protected final String cpath

Constructor Details

ImageTileDiskCache

public ImageTileDiskCache(String cpath)

Creates an ImageTileDiskCache.

Parameters:

cpath - path to the root directory of the cache

Method Details

getTile

public BufferedImage getTile(String name,
 int tileX,
 int tileY,
 double scale)
                      throws ImageIOException

Gets an image tile.

Specified by:

getTile in interface ImageTileSource

Parameters:

name - the image name

tileX - the X coordinate of the tile

tileY - the Y coordinate of the tile

scale - the scale of the tile

Returns:

the tile

Throws:

ImageIOException - if the tile can't be read

getTileSize

public Dimension getTileSize(String name,
 int tileX,
 int tileY,
 double scale)
                      throws ImageIOException

Gets the size of an image tile.

Specified by:

getTileSize in interface ImageTileSource

Parameters:

name - the image name

tileX - the X coordinate of the tile

tileY - the Y coordinate of the tile

scale - the scale of the tile

Returns:

the size of the tile

Throws:

ImageIOException - if the tile can't be read

tileExists

public boolean tileExists(String name,
 int tileX,
 int tileY,
 double scale)
                   throws ImageIOException

Checks whether an image tile exists.

Specified by:

tileExists in interface ImageTileSource

Parameters:

name - the image name

tileX - the X coordinate of the tile

tileY - the Y coordinate of the tile

scale - the scale of the tile

Throws:

ImageIOException - if the image can't be read

contains

public boolean contains(String path)
                 throws IOException

Queries whether a file exists in the store.

Specified by:

contains in interface FileStore

Parameters:

path - the path to the file in the store

Returns:

true if the file exists in the store

Throws:

IOException - oops

getInputStream

public InputStream getInputStream(String path)
                           throws IOException

Gets an InputStream to read from the given file.

Specified by:

getInputStream in interface FileStore

Parameters:

path - the path to the file in the store

Returns:

an InputStream containing the requested file

Throws:

IOException - oops

getSize

public long getSize(String path)
             throws IOException

Gets the size of a file in the store, in bytes.

Specified by:

getSize in interface FileStore

Parameters:

path - the path to the file in the store

Returns:

the size of the file, in bytes

Throws:

IOException - oops

getMTime

public long getMTime(String path)
              throws IOException

Gets the modification time of a file in the store, in milliseconds since the epoch.

Specified by:

getMTime in interface FileStore

Parameters:

path - the path to the file in the store

Returns:

the mtime of the file

Throws:

IOException - oops

getFiles

public List<String> getFiles()
                      throws IOException

Gets the list of files in the store.

Specified by:

getFiles in interface FileStore

Returns:

the list of files in the store

Throws:

IOException - oops

getFiles

public List<String> getFiles(String root)
                      throws IOException

Gets the list of files under a given directory of the store.

Specified by:

getFiles in interface FileStore

Parameters:

root - the directory

Returns:

the list of files under the given directory

Throws:

IOException - oops

isClosed

public boolean isClosed()

Checks whether the store is closed.

Specified by:

isClosed in interface FileStore

Returns:

true if the archive is closed

close

public void close()

Closes the store.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface FileStore