org.deegree.model.coverage.grid
Class AbstractGridCoverageWriter

java.lang.Object
  org.deegree.model.coverage.grid.AbstractGridCoverageWriter

All Implemented Interfaces:

GridCoverageWriter

Direct Known Subclasses:

GeoTIFFGridCoverageWriter, GMLGridCoverageWriter, ImageGridCoverageWriter, XYZGridCoverageWriter

public abstract class AbstractGridCoverageWriter
extends Object
implements GridCoverageWriter

Since:

2.0

Version:

$Revision: 18195 $, 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Andreas Poth, last edited by: $Author: mschneider $

Field Summary

protected Object	destination
protected Format	format
protected Map<String,Object>	metadata

Constructor Summary

AbstractGridCoverageWriter(Object destination, Map<String,Object> metadata, String[] subNames, String currentSubname, Format format)

Method Summary

String	getCurrentSubname() Returns the name for the next grid coverage to be read from the output destination.
Object	getDestination() Returns the output destination.
Format	getFormat() Returns the format handled by this GridCoverageWriter.
String[]	getMetadataNames() Returns the list of metadata keywords associated with the output destination as a whole (not associated with any particular grid coverage).
Object	getMetadataValue(String name) Retrieve the metadata value for a given metadata name.
String[]	listSubNames() Retrieve the list of grid coverages contained within the input source.
void	setCurrentSubname(String name) Set the name for the next grid coverage to GridCoverageWriter.write(GridCoverage, GeneralParameterValue[]) within theoutput destination.
void	setMetadataValue(String name, String value) Sets the metadata value for a given metadata name.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.deegree.model.coverage.grid.GridCoverageWriter

dispose, write

Field Detail

destination

protected Object destination

metadata

protected Map<String,Object> metadata

format

protected Format format

Constructor Detail

AbstractGridCoverageWriter

public AbstractGridCoverageWriter(Object destination,
                                  Map<String,Object> metadata,
                                  String[] subNames,
                                  String currentSubname,
                                  Format format)

Parameters:

destination -

metadata -

subNames -

currentSubname -

format -

Method Detail

getFormat

public Format getFormat()

Returns the format handled by this GridCoverageWriter.

Specified by:

getFormat in interface GridCoverageWriter

Returns:

the format handled by this GridCoverageWriter.

getDestination

public Object getDestination()

Returns the output destination. This is the object passed to the !unknown! method. It can be a String, an OutputStream, a FileChannel, etc.

Specified by:

getDestination in interface GridCoverageWriter

Returns:

the output destination

getMetadataNames

public String[] getMetadataNames()

Returns the list of metadata keywords associated with the output destination as a whole (not associated with any particular grid coverage). If no metadata is allowed, the array will be empty.

Specified by:

getMetadataNames in interface GridCoverageWriter

Returns:

The list of metadata keywords for the output destination.

revisit

This javadoc may not apply thats well in the iterator scheme.

getMetadataValue

public Object getMetadataValue(String name)
                        throws IOException,
                               MetadataNameNotFoundException

Retrieve the metadata value for a given metadata name.

Specified by:

getMetadataValue in interface GridCoverageWriter

Parameters:

name - Metadata keyword for which to retrieve metadata.

Returns:

The metadata value for the given metadata name. Should be one of the name returned by getMetadataNames().

Throws:

IOException - if an error occurs during reading.

MetadataNameNotFoundException - if there is no value for the specified metadata name.

revisit

This javadoc may not apply thats well in the iterator scheme.

setMetadataValue

public void setMetadataValue(String name,
                             String value)
                      throws IOException,
                             MetadataNameNotFoundException

Sets the metadata value for a given metadata name.

Specified by:

setMetadataValue in interface GridCoverageWriter

Parameters:

name - Metadata keyword for which to set the metadata.

value - The metadata value for the given metadata name.

Throws:

IOException - if an error occurs during writing.

MetadataNameNotFoundException - if the specified metadata name is not handled for this format.

revisit

This javadoc may not apply thats well in the iterator scheme.

listSubNames

public String[] listSubNames()
                      throws IOException

Retrieve the list of grid coverages contained within the input source. Each grid can have a different coordinate system, number of dimensions and grid geometry. For example, a HDF-EOS file (GRID.HDF) contains 6 grid coverages each having a different projection. An empty array will be returned if no sub names exist.

Specified by:

listSubNames in interface GridCoverageWriter

Returns:

The list of grid coverages contained within the input source.

Throws:

IOException - if an error occurs during reading.

revisit

The javadoc should also be more explicit about hierarchical format. Should the names be returned as paths? Explain what to return if the GridCoverage are accessible by index only. A proposal is to name them "grid1", "grid2", etc.

getCurrentSubname

public String getCurrentSubname()
                         throws IOException

Returns the name for the next grid coverage to be read from the output destination.

Specified by:

getCurrentSubname in interface GridCoverageWriter

Returns:

the name for the next grid coverage to be

Throws:

IOException - if an error occurs during reading.

revisit

Do we need a special method for that, or should it be a metadata?

setCurrentSubname

public void setCurrentSubname(String name)
                       throws IOException

Set the name for the next grid coverage to GridCoverageWriter.write(GridCoverage, GeneralParameterValue[]) within theoutput destination. The subname can been fetch later at reading time.

Specified by:

setCurrentSubname in interface GridCoverageWriter

Throws:

IOException - if an error occurs during writing.

revisit

Do we need a special method for that, or should it be a metadata?