/*
* $Id: IDV-Style.xjs,v 1.3 2007/02/16 19:18:30 dmurray Exp $
*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package ucar.nc2.iosp.mcidas;
import ucar.grid.GridIndex;
import ucar.grid.GridRecord;
import ucar.ma2.*;
import ucar.nc2.*;
import ucar.nc2.iosp.IOServiceProvider;
import ucar.nc2.iosp.grid.*;
import ucar.nc2.util.CancelTask;
import ucar.unidata.io.RandomAccessFile;
import java.io.IOException;
/**
* An IOSP for McIDAS Grid data
*
* @author IDV Development Team
* @version $Revision: 1.3 $
*/
public class McIDASGridServiceProvider extends GridServiceProvider {
/** McIDAS file reader */
protected McIDASGridReader mcGridReader;
/**
* Is this a valid file?
*
* @param raf RandomAccessFile to check
*
* @return true if a valid McIDAS grid file
*
* @throws IOException problem reading file
*/
public boolean isValidFile(RandomAccessFile raf) throws IOException {
try {
mcGridReader = new McIDASGridReader();
mcGridReader.init(raf, false);
} catch (IOException ioe) {
return false;
}
return true;
}
/**
* Get the file type id
*
* @return the file type id
*/
public String getFileTypeId() {
return "McIDASGrid";
}
/**
* Get the file type description
*
* @return the file type description
*/
public String getFileTypeDescription() {
return "McIDAS Grid file";
}
/**
* Open the service provider for reading.
* @param raf file to read from
* @param ncfile netCDF file we are writing to (memory)
* @param cancelTask task for cancelling
*
* @throws IOException problem reading file
*/
public void open(RandomAccessFile raf, NetcdfFile ncfile,
CancelTask cancelTask)
throws IOException {
//debugProj = true;
super.open(raf, ncfile, cancelTask);
long start = System.currentTimeMillis();
if (mcGridReader == null) {
mcGridReader = new McIDASGridReader();
}
mcGridReader.init(raf);
GridIndex index = ((McIDASGridReader) mcGridReader).getGridIndex();
open(index, cancelTask);
if (debugOpen) {
System.out.println(" GridServiceProvider.open "
+ ncfile.getLocation() + " took "
+ (System.currentTimeMillis() - start));
}
}
/**
* Open the index and create the netCDF file from that
*
* @param index GridIndex to use
* @param cancelTask cancel task
*
* @throws IOException problem reading the file
*/
protected void open(GridIndex index, CancelTask cancelTask)
throws IOException {
McIDASLookup lookup =
new McIDASLookup(
(McIDASGridRecord) index.getGridRecords().get(0));
GridIndexToNC delegate = new GridIndexToNC(index.filename);
//delegate.setUseDescriptionForVariableName(false);
delegate.open(index, lookup, 4, ncfile, fmrcCoordSys, cancelTask);
ncfile.finish();
}
/**
* Sync and extend
*
* @return false
*/
public boolean sync() {
try {
if ( !mcGridReader.init()) {
return false;
}
GridIndex index =
((McIDASGridReader) mcGridReader).getGridIndex();
// reconstruct the ncfile objects
ncfile.empty();
open(index, null);
return true;
} catch (IOException ioe) {
return false;
}
}
/**
* Read the data for this GridRecord
*
* @param gr grid identifier
*
* @return the data (or null)
*
* @throws IOException problem reading the data
*/
protected float[] _readData(GridRecord gr) throws IOException {
return mcGridReader.readGrid((McIDASGridRecord) gr);
}
/**
* Test this
*
* @param args filename
*
* @throws IOException problem reading file
*/
public static void main(String[] args) throws IOException {
IOServiceProvider mciosp = new McIDASGridServiceProvider();
RandomAccessFile rf = new RandomAccessFile(args[0], "r", 2048);
NetcdfFile ncfile = new MakeNetcdfFile(mciosp, rf, args[0], null);
}
/**
* Not sure why we need this
*
* @author IDV Development Team
* @version $Revision: 1.3 $
*/
static class MakeNetcdfFile extends NetcdfFile {
/**
* wrapper for a netCDF file
*
* @param spi iosp
* @param raf random access file
* @param location location of the file
* @param cancelTask cancel task
*
* @throws IOException problem reading file
*/
MakeNetcdfFile(IOServiceProvider spi, RandomAccessFile raf,
String location, CancelTask cancelTask)
throws IOException {
super(spi, raf, location, cancelTask);
}
}
}