src.gov.nasa.worldwind.data.DTEDRasterReader Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of worldwindx Show documentation
Show all versions of worldwindx Show documentation
World Wind is a collection of components that interactively display 3D geographic information within Java applications or applets.
/*
* Copyright (C) 2012 United States Government as represented by the Administrator of the
* National Aeronautics and Space Administration.
* All Rights Reserved.
*/
package gov.nasa.worldwind.data;
import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.avlist.AVList;
import gov.nasa.worldwind.formats.dted.DTED;
import gov.nasa.worldwind.util.*;
import java.io.File;
import java.io.IOException;
/**
* @author Lado Garakanidze
* @version $Id: DTEDRasterReader.java 1171 2013-02-11 21:45:02Z dcollins $
*/
public class DTEDRasterReader extends AbstractDataRasterReader
{
protected static final String[] dtedMimeTypes = new String[]{
"application/dted",
"application/dt0", "application/dted-0",
"application/dt1", "application/dted-1",
"application/dt2", "application/dted-2",
};
protected static final String[] dtedSuffixes = new String[]
{"dt0", "dt1", "dt2"};
public DTEDRasterReader()
{
super(dtedMimeTypes, dtedSuffixes);
}
@Override
protected boolean doCanRead(Object source, AVList params)
{
File file = this.getFile(source);
if (null == file)
{
return false;
}
boolean canRead = false;
try
{
AVList metadata = DTED.readMetadata(file);
if (null != metadata)
{
if (null != params)
{
params.setValues(metadata);
}
canRead = AVKey.ELEVATION.equals(metadata.getValue(AVKey.PIXEL_FORMAT));
}
}
catch (Throwable t)
{
Logging.logger().finest(t.getMessage());
canRead = false;
}
return canRead;
}
@Override
protected DataRaster[] doRead(Object source, AVList params) throws IOException
{
File file = this.getFile(source);
if (null == file)
{
String message = Logging.getMessage("generic.UnrecognizedSourceTypeOrUnavailableSource", source);
Logging.logger().severe(message);
throw new IOException(message);
}
DataRaster raster = DTED.read(file);
if( raster instanceof ByteBufferRaster)
ElevationsUtil.rectify((ByteBufferRaster)raster);
return new DataRaster[]{ raster };
}
@Override
protected void doReadMetadata(Object source, AVList params) throws IOException
{
File file = this.getFile(source);
if (null == file)
{
String message = Logging.getMessage("generic.UnrecognizedSourceTypeOrUnavailableSource", source);
Logging.logger().severe(message);
throw new IOException(message);
}
AVList metadata = DTED.readMetadata(file);
if (null != metadata && null != params)
{
params.setValues(metadata);
}
}
protected File getFile(Object source)
{
if (null == source)
{
return null;
}
else if (source instanceof java.io.File)
{
return (File) source;
}
else if (source instanceof java.net.URL)
{
return WWIO.convertURLToFile((java.net.URL) source);
}
else
{
return null;
}
}
}