org.deegree.coverage.raster.io.grid
Class TileOffsetReader

java.lang.Object
  org.deegree.coverage.raster.io.grid.TileOffsetReader

All Implemented Interfaces:

RasterReader

public class TileOffsetReader
extends Object
implements RasterReader

A simple wrapper class needed to mark the offset for a given tile in the total grid.

Version:

$Revision: 31644 $, $Date: 2011-08-24 22:27:43 +0200 (Wed, 24 Aug 2011) $

Author:

Rutger Bezema, last edited by: $Author: mschneider $

Constructor Summary

TileOffsetReader(GridReader original, RasterRect tileRectInGrid)

Method Summary

boolean	canLoad(File filename) Check if the raster reader is able to read the given raster file.
boolean	canReadTiles() should return true if the given reader can easily read tiles,without consuming much more memory than needed.
void	dispose() Signals the reader that it should try to dispose all in memory data.
File	file()
String	getDataLocationId()
RasterGeoReference	getGeoReference()
int	getHeight()
RasterDataInfo	getRasterDataInfo()
Set<String>	getSupportedFormats()
int	getWidth()
AbstractRaster	load(File filename, RasterIOOptions options) Read the given raster file into an abstract raster.
AbstractRaster	load(InputStream stream, RasterIOOptions options) Read the given input stream into an abstract raster.
BufferResult	read(RasterRect rect, ByteBuffer buffer)
boolean	shouldCreateCacheFile()

Methods inherited from class java.lang.Object

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

Constructor Detail

TileOffsetReader

public TileOffsetReader(GridReader original,
                        RasterRect tileRectInGrid)

Parameters:

original - mapped gridreader

tileRectInGrid - the rectangle inside the grid.

Method Detail

canLoad

public boolean canLoad(File filename)

Description copied from interface: RasterReader

Check if the raster reader is able to read the given raster file.

Specified by:

canLoad in interface RasterReader

Returns:

true if the class can read the raster

file

public File file()

Specified by:

file in interface RasterReader

Returns:

the file from which the raster was read.

getGeoReference

public RasterGeoReference getGeoReference()

Specified by:

getGeoReference in interface RasterReader

Returns:

the geo reference of the read raster

getHeight

public int getHeight()

Specified by:

getHeight in interface RasterReader

Returns:

the height (in pixels) of the read raster

getSupportedFormats

public Set<String> getSupportedFormats()

Specified by:

getSupportedFormats in interface RasterReader

Returns:

a Set of (image) formats mime/types the implementation is able to read.

getWidth

public int getWidth()

Specified by:

getWidth in interface RasterReader

Returns:

the width (in pixels) of the read raster

load

public AbstractRaster load(File filename,
                           RasterIOOptions options)
                    throws IOException

Description copied from interface: RasterReader

Read the given raster file into an abstract raster.

Specified by:

load in interface RasterReader

Returns:

the loaded raster

Throws:

IOException - may be thrown when there is a problem with reading the raster.

load

public AbstractRaster load(InputStream stream,
                           RasterIOOptions options)
                    throws IOException

Description copied from interface: RasterReader

Read the given input stream into an abstract raster.

Specified by:

load in interface RasterReader

Returns:

the loaded raster

Throws:

IOException - may be thrown when there is a problem with reading the raster.

read

public BufferResult read(RasterRect rect,
                         ByteBuffer buffer)
                  throws IOException

Specified by:

read in interface RasterReader

Parameters:

rect - to read.

buffer - to store the result in

Returns:

the read buffer and its domain

Throws:

IOException

shouldCreateCacheFile

public boolean shouldCreateCacheFile()

Specified by:

shouldCreateCacheFile in interface RasterReader

Returns:

true if a cache file should be created for the read raster.

getRasterDataInfo

public RasterDataInfo getRasterDataInfo()

Specified by:

getRasterDataInfo in interface RasterReader

Returns:

the raster data info

canReadTiles

public boolean canReadTiles()

Description copied from interface: RasterReader

should return true if the given reader can easily read tiles,without consuming much more memory than needed.

Specified by:

canReadTiles in interface RasterReader

Returns:

true if the reader can easily read tiles.

getDataLocationId

public String getDataLocationId()

Specified by:

getDataLocationId in interface RasterReader

Returns:

a String which identifies this reader for used the data source, for example the file name, or an url.

dispose

public void dispose()

Description copied from interface: RasterReader

Signals the reader that it should try to dispose all in memory data.

Specified by:

dispose in interface RasterReader