/*
* Copyright 1998-2014 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
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* understands that UCAR/Unidata is not obligated to provide the user with
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*
* 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
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*/
package ucar.nc2.dataset.conv;
import ucar.ma2.*;
import ucar.nc2.*;
import ucar.nc2.constants.CDM;
import ucar.nc2.ncml.NcMLReader;
import ucar.nc2.util.CancelTask;
import ucar.nc2.dataset.*;
import java.io.IOException;
/**
* Zebra ATD files.
*
* @author caron
*/
public class ZebraConvention extends ATDRadarConvention {
/**
* @param ncfile the NetcdfFile to test
* @return true if we think this is a Zebra file.
*/
public static boolean isMine(NetcdfFile ncfile) {
String s = ncfile.findAttValueIgnoreCase(null, "Convention", "none");
return s.startsWith("Zebra");
}
public ZebraConvention() {
this.conventionName = "Zebra";
}
public void augmentDataset(NetcdfDataset ds, CancelTask cancelTask) throws IOException {
NcMLReader.wrapNcMLresource(ds, CoordSysBuilder.resourcesDir + "Zebra.ncml", cancelTask);
// special time handling
// the time coord var is created in the NcML
// set its values = base_time + time_offset(time)
Dimension timeDim = ds.findDimension("time");
Variable base_time = ds.findVariable("base_time");
Variable time_offset = ds.findVariable("time_offset");
Variable time = ds.findVariable("time");
if ((timeDim == null) || (base_time == null) || (time_offset == null) || (time == null))
return;
Attribute att = base_time.findAttribute(CDM.UNITS);
String units = (att != null) ? att.getStringValue() : "seconds since 1970-01-01 00:00 UTC";
time.addAttribute(new Attribute(CDM.UNITS, units));
Array data;
try {
double baseValue = base_time.readScalarDouble();
data = time_offset.read();
IndexIterator iter = data.getIndexIterator();
while (iter.hasNext())
iter.setDoubleCurrent(iter.getDoubleNext() + baseValue);
} catch (java.io.IOException ioe) {
parseInfo.format("ZebraConvention failed to create time Coord Axis for file %s err= %s%n", ds.getLocation(), ioe);
return;
}
time.setCachedData(data, true);
}
/**
* Search for netcdf variables with "coord_axis" pointing to a Dimension
* construct coordAxes from them, add to collection of CoordAxisImpl.
*
protected void addCoordAxesFromAliasVariables() {
// look for aliased variables
Iterator vars = netcdf.getVariableIterator();
while (vars.hasNext()) {
Variable ncvar = (Variable) vars.next();
String dimName = netcdf.findAttValueIgnoreCase(ncvar, "coord_axis", null);
if (null == dimName)
continue;
Dimension dim = netcdf.findDimension( dimName);
if (null != dim)
addCoordAxisFromVariable( dim, ncvar);
}
}
// look for an coord_alias attribute
private String findAlias( DimCoordAxis dc) {
if (dc.mid != null)
return netcdf.findAttValueIgnoreCase(dc.mid, "coord_alias", "");
if (dc.edge != null)
return netcdf.findAttValueIgnoreCase(dc.edge, "coord_alias", "");
return "";
} */
}