public static DateRange extractDateRange(GridDataset gridDataset) {
DateRange maxDateRange = null;
for (GridDataset.Gridset gridset : gridDataset.getGridsets()) {
GridCoordSystem gsys = gridset.getGeoCoordSystem();
DateRange dateRange;
CoordinateAxis1DTime time1D = gsys.getTimeAxis1D();
if (time1D != null) {
dateRange = time1D.getDateRange();
} else {
CoordinateAxis time = gsys.getTimeAxis();
if (time == null) continue;
try {
DateUnit du = new DateUnit(time.getUnitsString());
Date minDate = du.makeDate(time.getMinValue());
Date maxDate = du.makeDate(time.getMaxValue());
dateRange = new DateRange(minDate, maxDate);
} catch (Exception e) {
logger.warn("Illegal Date Unit " + time.getUnitsString());
continue;
}
}
if (maxDateRange == null) maxDateRange = dateRange;
else maxDateRange.extend(dateRange);
}
return maxDateRange;
}
/**
* Extract a list of data variables (and their canonical names if possible) from the dataset.
*
* @param threddsDataset open this dataset
* @return ThreddsMetadata.Variables, or null if unable.
* @throws IOException on read error
*/
public static ThreddsMetadata.Variables extractVariables(InvDatasetImpl threddsDataset)
throws IOException {
ThreddsDataFactory.Result result = null;
try {
result = new ThreddsDataFactory().openFeatureDataset(threddsDataset, null);
if (result.fatalError) {
System.out.println(" openDatatype errs=" + result.errLog);
return null;
}
if (result.featureType == FeatureType.GRID) {
// System.out.println(" extractVariables GRID=" + result.location);
GridDataset gridDataset = (GridDataset) result.featureDataset;
return extractVariables(threddsDataset, gridDataset);
} else if ((result.featureType == FeatureType.STATION)
|| (result.featureType == FeatureType.POINT)) {
PointObsDataset pobsDataset = (PointObsDataset) result.featureDataset;
ThreddsMetadata.Variables vars = new ThreddsMetadata.Variables("CF-1.0");
for (VariableSimpleIF vs : pobsDataset.getDataVariables()) {
ThreddsMetadata.Variable v = new ThreddsMetadata.Variable();
vars.addVariable(v);
v.setName(vs.getName());
v.setDescription(vs.getDescription());
v.setUnits(vs.getUnitsString());
ucar.nc2.Attribute att = vs.findAttributeIgnoreCase("standard_name");
v.setVocabularyName((att != null) ? att.getStringValue() : "N/A");
}
vars.sort();
return vars;
}
} finally {
try {
if ((result != null) && (result.featureDataset != null)) result.featureDataset.close();
} catch (IOException ioe) {
logger.error("Closing dataset " + result.featureDataset, ioe);
}
}
return null;
}
/**
* Extract the lat/lon/alt bounding boxes from the dataset.
*
* @param threddsDataset open this dataset
* @return ThreddsMetadata.GeospatialCoverage, or null if unable.
* @throws IOException on read error
*/
public static ThreddsMetadata.GeospatialCoverage extractGeospatial(InvDatasetImpl threddsDataset)
throws IOException {
ThreddsDataFactory.Result result = null;
try {
result = new ThreddsDataFactory().openFeatureDataset(threddsDataset, null);
if (result.fatalError) {
System.out.println(" openDatatype errs=" + result.errLog);
return null;
}
if (result.featureType == FeatureType.GRID) {
System.out.println(" GRID=" + result.location);
GridDataset gridDataset = (GridDataset) result.featureDataset;
return extractGeospatial(gridDataset);
} else if (result.featureType == FeatureType.POINT) {
PointObsDataset pobsDataset = (PointObsDataset) result.featureDataset;
LatLonRect llbb = pobsDataset.getBoundingBox();
if (null != llbb) {
ThreddsMetadata.GeospatialCoverage gc = new ThreddsMetadata.GeospatialCoverage();
gc.setBoundingBox(llbb);
return gc;
}
} else if (result.featureType == FeatureType.STATION) {
StationObsDataset sobsDataset = (StationObsDataset) result.featureDataset;
LatLonRect llbb = sobsDataset.getBoundingBox();
if (null != llbb) {
ThreddsMetadata.GeospatialCoverage gc = new ThreddsMetadata.GeospatialCoverage();
gc.setBoundingBox(llbb);
return gc;
}
}
} finally {
try {
if ((result != null) && (result.featureDataset != null)) result.featureDataset.close();
} catch (IOException ioe) {
logger.error("Closing dataset " + result.featureDataset, ioe);
}
}
return null;
}
