org.gvsig.raster.impl.provider.tile

Class TileDownloaderForFiles

java.lang.Object

org.gvsig.raster.impl.provider.tile.BaseTileDownloader

org.gvsig.raster.impl.provider.tile.TileDownloaderForFiles

All Implemented Interfaces:

Downloader

Direct Known Subclasses:

TileDownloaderForPostGISRaster

public class TileDownloaderForFiles
extends BaseTileDownloader

Tile getter

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	extension
protected CacheStruct	struct

Fields inherited from class org.gvsig.raster.impl.provider.tile.BaseTileDownloader

byteNoData, doubleNoData, floatNoData, intNoData, shortNoData, store, tilePxHeight, tilePxWidth

Constructor Summary

Constructors

Constructor and Description
TileDownloaderForFiles(RasterDataStore store, CacheStruct struct, int tileWidth, int tileHeight, java.lang.String extension)

Method Summary

Modifier and Type	Method and Description
protected Buffer	buildTileBuffer(int nbands, int w, int h) Builds a buffer using the specified number of bands and initialize it
Tile	downloadTile(Tile tile) Gets a tile from the data source.
boolean	isInternalTile(int bufWidth, int bufHeight)
protected Buffer	readSupersampledBuffer(Extent tileExtent, int bufWidth, int bufHeight, boolean hasAlphaBand) When the buffer of the request is greater than the original raster (> scale 1:1) then the request has to be resampled.

Methods inherited from class org.gvsig.raster.impl.provider.tile.BaseTileDownloader

clearMaskBuffer, getCrashImage, getDownloadingImage, getTileSize, readTileFromDisk, saveTile, setNoDataValue

Methods inherited from class java.lang.Object

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

Field Detail

struct

protected CacheStruct struct

extension

protected java.lang.String extension

Constructor Detail

TileDownloaderForFiles

public TileDownloaderForFiles(RasterDataStore store,
                              CacheStruct struct,
                              int tileWidth,
                              int tileHeight,
                              java.lang.String extension)

Method Detail

downloadTile

public Tile downloadTile(Tile tile)
                  throws TileGettingException

Description copied from interface: Downloader

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

Returns:

Tile loaded

Throws:

TileGettingException

isInternalTile

public boolean isInternalTile(int bufWidth,
                              int bufHeight)

readSupersampledBuffer

protected Buffer readSupersampledBuffer(Extent tileExtent,
                                        int bufWidth,
                                        int bufHeight,
                                        boolean hasAlphaBand)
                                 throws ProcessInterruptedException,
                                        QueryException,
                                        TileGettingException

When the buffer of the request is greater than the original raster (> scale 1:1) then the request has to be resampled.

Parameters:

tileExtent -

newBandList -

bufWidth -

bufHeight -

nBands -

Returns:

Throws:

ProcessInterruptedException

TileGettingException

QueryException

buildTileBuffer

protected Buffer buildTileBuffer(int nbands,
                                 int w,
                                 int h)

Builds a buffer using the specified number of bands and initialize it

Parameters:

nbands -

Returns: