org.geotools.gce.grassraster.core

Class GrassBinaryRasterWriteHandler

Object

GrassBinaryRasterWriteHandler

public class GrassBinaryRasterWriteHandler
extends Object

Grass binary data input/ouput handler.

Reading and writing is supported.

Since:

3.0

Author:

Andrea Antonello (www.hydrologis.com)

See Also:

GrassBinaryImageReader, GrassBinaryImageReadParam, GrassBinaryImageMetadata

Constructor Summary

Constructors

Constructor and Description
GrassBinaryRasterWriteHandler(File destMapset, String newMapName, ProgressListener monitor) A constructor to build a GrassBinaryRasterWriteHandler usable for writing grass rasters.

Method Summary

Modifier and Type	Method and Description
void	abort() sets the abortrequired flag to true.
void	close() Closes the I/O streams.
CoordinateReferenceSystem	getCrs() Reads the crs definition for the map.
double	getNoData() Getter for the noData value.
JGrassRegion	getWriteRegion() Calculates the region that is going to be written.
boolean	isAborting() Getter for the abortrequired flag.
void	setNoData(double noData) Setter for the noData value.
void	setWriteRegion(JGrassRegion writeRegion)
void	writeRaster(RenderedImage renderedImage, int columns, int rows, double west, double south, double xRes, double yRes, double noDataValue) Writes the raster, given an raster iterator and region metadata.

Methods inherited from class Object

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

Constructor Detail

GrassBinaryRasterWriteHandler

public GrassBinaryRasterWriteHandler(File destMapset,
                                     String newMapName,
                                     ProgressListener monitor)

A constructor to build a GrassBinaryRasterWriteHandler usable for writing grass rasters.

Parameters:

destMapset - the mapset file into which the map has to be written.

newMapName - the name for the written map.

monitor -

Method Detail

writeRaster

public void writeRaster(RenderedImage renderedImage,
                        int columns,
                        int rows,
                        double west,
                        double south,
                        double xRes,
                        double yRes,
                        double noDataValue)
                 throws IOException

Writes the raster, given an raster iterator and region metadata.

Parameters:

renderedImage - the RenderedImage to write.

columns - the columns of the raster to write.

rows - the rows of the raster to write.

west - the western bound of the raster to write.

south - the southern bound of the raster to write.

xRes - the east-west resolution of the raster to write.

yRes - the north-south resolution of the raster to write.

noDataValue - the value representing noData.

Throws:

IOException

getWriteRegion

public JGrassRegion getWriteRegion()
                            throws IOException

Calculates the region that is going to be written.

Returns:

the region that will be written by this Writer.

Throws:

IOException

setWriteRegion

public void setWriteRegion(JGrassRegion writeRegion)

close

public void close()
           throws IOException

Closes the I/O streams.

Throws:

IOException

setNoData

public void setNoData(double noData)

Setter for the noData value.

Parameters:

noData - the nodata value to set.

getNoData

public double getNoData()

Getter for the noData value.

Returns:

the nodata value.

getCrs

public CoordinateReferenceSystem getCrs()
                                 throws IOException

Reads the crs definition for the map.

The definition for grass maps is held in the location. Grass projection definitions are usually in a non parsable internal format. In JGrass we ask the user to choose the CRS. If the user doesn't do so, the CRS will result to be undefined.

Returns:

the CoordinateReferenceSystem for the map. Null if it is not defined.

Throws:

IOException - if there were problems in parsing the CRS file.

abort

public void abort()

sets the abortrequired flag to true.

As soon as possible that should abort the reader.

isAborting

public boolean isAborting()

Getter for the abortrequired flag.

Returns:

the abortRequired flag.