org.openstreetmap.gui.jmapviewer.interfaces

Interface TileCache

All Known Implementing Classes:

MemoryTileCache

public interface TileCache

Implement this interface for creating your custom tile cache for JMapViewer.

Method Summary

Modifier and Type	Method and Description
void	addTile(Tile tile) Adds a tile to the cache.
void	clear() Clears the cache deleting all tiles from memory.
int	getCacheSize() Size of the cache.
Tile	getTile(TileSource source, int x, int y, int z) Retrieves a tile from the cache if present, otherwise null will be returned.
int	getTileCount()

Method Detail

getTile

Tile getTile(TileSource source,
             int x,
             int y,
             int z)

Retrieves a tile from the cache if present, otherwise null will be returned.

Parameters:

source - the tile source

x - tile number on the x axis of the tile to be retrieved

y - tile number on the y axis of the tile to be retrieved

z - zoom level of the tile to be retrieved

Returns:

the requested tile or null if the tile is not present in the cache

addTile

void addTile(Tile tile)

Adds a tile to the cache. How long after adding a tile can be retrieved via getTile(TileSource, int, int, int) is unspecified and depends on the implementation.

Parameters:

tile - the tile to be added

getTileCount

int getTileCount()

Returns:

the number of tiles hold by the cache

clear

void clear()

Clears the cache deleting all tiles from memory.

getCacheSize

int getCacheSize()

Size of the cache.

Returns:

maximum number of tiles in cache