org.gvsig.raster.cache.tile.provider

Interface Downloader

All Known Implementing Classes:

BaseTileDownloader, TileDownloaderForBingMaps, TileDownloaderForFiles, TileDownloaderForFiles_oldversion, TileDownloaderForGoogleMaps, TileDownloaderForOSM, TileDownloaderForPostGISRaster, TileDownloaderForWCS, TileDownloaderForWMS, TileDownloaderForWMTS

public interface Downloader

Tile cache uses this interface to get a tile and the data provider have to implement it to serve tiles.

Method Summary

Modifier and Type	Method and Description
Tile	downloadTile(Tile tile) Gets a tile from the data source.
java.lang.Object[]	getCrashImage(int w, int h) Gets the image that represent a crash tile
java.lang.Object[]	getDownloadingImage(int w, int h) Gets the image that represent a tile while is downloading
Tile	readTileFromDisk(Tile tile) Reads a tile from the tile cache.

Method Detail

downloadTile

Tile downloadTile(Tile tile)
           throws TileGettingException

Gets a tile from the data source. The parameter tile contains the information of the tile to download. If the provider is a remote service this will have to download the tile from the server and if it is a file provider the source will be a file.

Parameters:

tile - Tile information

param - Additional parameter

Returns:

Tile loaded

Throws:

TileGettingException

readTileFromDisk

Tile readTileFromDisk(Tile tile)
               throws TileGettingException

Reads a tile from the tile cache. The path to the tile is in the Tile object

Parameters:

tile -

Returns:

Throws:

TileGettingException

getDownloadingImage

java.lang.Object[] getDownloadingImage(int w,
                                       int h)

Gets the image that represent a tile while is downloading

Returns:

getCrashImage

java.lang.Object[] getCrashImage(int w,
                                 int h)

Gets the image that represent a crash tile

Returns: