org.gvsig.raster.impl.provider.tile

Class BaseTileDownloader

java.lang.Object

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

All Implemented Interfaces:

Downloader

Direct Known Subclasses:

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

public abstract class BaseTileDownloader
extends Object
implements Downloader

Base class for downloaders

Field Summary

Fields

Modifier and Type	Field and Description
protected byte	byteNoData
protected double	doubleNoData
protected float	floatNoData
protected int	intNoData
protected short	shortNoData
protected RasterDataStore	store
protected int	tilePxHeight
protected int	tilePxWidth

Constructor Summary

Constructors

Constructor and Description
BaseTileDownloader(RasterDataStore store, int tilePxWidth, int tilePxHeight)

Method Summary

Modifier and Type	Method and Description
protected void	clearMaskBuffer(Buffer buf, int nBand) Sets a band to NODATA value
Object[]	getCrashImage(int w, int h) Gets the image that represent a crash tile
Object[]	getDownloadingImage(int w, int h) Gets the image that represent a tile while is downloading.
int[]	getTileSize() Gets the size of a tile in pixels
Tile	readTileFromDisk(Tile tile) Reads a tile from the tile cache.
protected void	saveTile(Buffer bufResult, double pixelSize, String extension, boolean alphaBand, Tile tile, Extent tileExtent, ColorInterpretation colorInterpretation) Saves a buffer to disk
void	setNoDataValue(NoData noData) Sets the nodata value

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.gvsig.raster.cache.tile.provider.Downloader

downloadTile

Field Detail

tilePxWidth

protected int tilePxWidth

tilePxHeight

protected int tilePxHeight

store

protected RasterDataStore store

byteNoData

protected byte byteNoData

shortNoData

protected short shortNoData

intNoData

protected int intNoData

floatNoData

protected float floatNoData

doubleNoData

protected double doubleNoData

Constructor Detail

BaseTileDownloader

public BaseTileDownloader(RasterDataStore store,
                          int tilePxWidth,
                          int tilePxHeight)

Method Detail

getDownloadingImage

public Object[] getDownloadingImage(int w,
                                    int h)

Gets the image that represent a tile while is downloading.

Specified by:

getDownloadingImage in interface Downloader

Returns:

getCrashImage

public Object[] getCrashImage(int w,
                              int h)

Gets the image that represent a crash tile

Specified by:

getCrashImage in interface Downloader

Returns:

getTileSize

public int[] getTileSize()

Gets the size of a tile in pixels

Returns:

Array of two integers. The first integer is the width and the second the height in pixels

setNoDataValue

public void setNoDataValue(NoData noData)

Sets the nodata value

Parameters:

noData -

readTileFromDisk

public Tile readTileFromDisk(Tile tile)
                      throws TileGettingException

Description copied from interface: Downloader

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

Specified by:

readTileFromDisk in interface Downloader

Returns:

Throws:

TileGettingException

clearMaskBuffer

protected void clearMaskBuffer(Buffer buf,
                               int nBand)

Sets a band to NODATA value

Parameters:

bufResult -

tileExtent -

buf -

ex -

pixelSize -

saveTile

protected void saveTile(Buffer bufResult,
                        double pixelSize,
                        String extension,
                        boolean alphaBand,
                        Tile tile,
                        Extent tileExtent,
                        ColorInterpretation colorInterpretation)
                 throws NotSupportedExtensionException,
                        RasterDriverException,
                        ProcessInterruptedException,
                        IOException

Saves a buffer to disk

Parameters:

bufResult - Buffer to save

pixelSize - Pixel size

extension - output file format

alphaBand - true if it has alpha band

path - Path to the new file

tileExtent - Bounding box of the tile

Throws:

NotSupportedExtensionException

RasterDriverException

ProcessInterruptedException

IOException