thredds.wcs.v1_0_0_1.DescribeCoverage Maven / Gradle / Ivy
/*
* 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.
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package thredds.wcs.v1_0_0_1;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Attribute;
import org.jdom.output.XMLOutputter;
import java.util.List;
import java.util.Date;
import java.io.PrintWriter;
import java.io.IOException;
import ucar.nc2.dt.GridCoordSystem;
import ucar.nc2.dataset.CoordinateAxis1D;
import ucar.nc2.dataset.CoordinateAxis1DTime;
import ucar.nc2.units.DateFormatter;
import ucar.unidata.geoloc.LatLonRect;
import ucar.unidata.geoloc.LatLonPoint;
import thredds.wcs.Request;
/**
* _more_
*
* @author edavis
* @since 4.0
*/
public class DescribeCoverage extends WcsRequest
{
// private static org.slf4j.Logger log =
// org.slf4j.LoggerFactory.getLogger( DescribeCoverage.class );
private List coverages;
private Document describeCoverageDoc;
public DescribeCoverage( Request.Operation operation, String version, WcsDataset dataset,
List coverages )
throws WcsException
{
super( operation, version, dataset );
this.coverages = coverages;
if ( this.coverages == null )
throw new IllegalArgumentException( "Non-null coverage list required." );
if ( this.coverages.size() < 1 )
throw new IllegalArgumentException( "Coverage list must contain at least one ID [" + this.coverages.size() + "]." );
String badCovIds = "";
for ( String curCov : coverages )
{
if ( ! this.getDataset().isAvailableCoverageName( curCov))
badCovIds += (badCovIds.length() > 0 ? ", " : "") + curCov;
}
if ( badCovIds.length() > 0 )
throw new WcsException("Coverage ID list contains one or more unknown IDs [" + badCovIds + "]." );
}
public Document getDescribeCoverageDoc()
{
if ( this.describeCoverageDoc == null )
describeCoverageDoc = generateDescribeCoverageDoc();
return describeCoverageDoc;
}
public void writeDescribeCoverageDoc( PrintWriter pw )
throws IOException
{
XMLOutputter xmlOutputter = new XMLOutputter( org.jdom.output.Format.getPrettyFormat() );
xmlOutputter.output( getDescribeCoverageDoc(), pw );
}
public String writeDescribeCoverageDocAsString()
throws IOException
{
XMLOutputter xmlOutputter = new XMLOutputter( org.jdom.output.Format.getPrettyFormat() );
return xmlOutputter.outputString( getDescribeCoverageDoc() );
}
Document generateDescribeCoverageDoc()
{
// CoverageDescription (wcs) [1]
Element coverageDescriptionsElem = new Element( "CoverageDescription", wcsNS );
coverageDescriptionsElem.addNamespaceDeclaration( gmlNS );
coverageDescriptionsElem.addNamespaceDeclaration( xlinkNS );
coverageDescriptionsElem.setAttribute( "version", this.getVersion() );
// ToDo Consider dealing with "updateSequence"
// coverageDescriptionsElem.setAttribute( "updateSequence", this.getCurrentUpdateSequence() );
for ( String curCoverageId : this.coverages )
coverageDescriptionsElem.addContent( genCoverageOfferingElem( curCoverageId ) );
return new Document( coverageDescriptionsElem );
}
public Element genCoverageOfferingElem( String covId )
{
// ToDo WCS 1.0Plus - Change GridDatatype to GridDataset.Gridset
WcsCoverage coverage = this.getDataset().getAvailableCoverage( covId );
GridCoordSystem gridCoordSystem = coverage.getCoordinateSystem();
// CoverageDescription/CoverageOffering (wcs) [1..*]
Element covDescripElem = genCoverageOfferingBriefElem( "CoverageOffering", covId,
coverage.getLabel(), coverage.getDescription(),
gridCoordSystem );
// CoverageDescription/CoverageOffering/domainSet [1]
covDescripElem.addContent( genDomainSetElem( coverage));
// CoverageDescription/CoverageOffering/rangeSet [1]
covDescripElem.addContent( genRangeSetElem( coverage));
// CoverageDescription/CoverageOffering/supportedCRSs [1]
covDescripElem.addContent( genSupportedCRSsElem( coverage));
// CoverageDescription/CoverageOffering/supportedFormats [1]
covDescripElem.addContent( genSupportedFormatsElem( coverage) );
// CoverageDescription/CoverageOffering/supportedInterpolations [0..1]
covDescripElem.addContent( genSupportedInterpolationsElem() );
return covDescripElem;
}
private Element genDomainSetElem( WcsCoverage coverage)
{
// ../domainSet
Element domainSetElem = new Element( "domainSet", wcsNS);
// ../domainSet/spatialDomain [0..1] AND/OR temporalDomain [0..1]
domainSetElem.addContent( genSpatialDomainElem( coverage) );
if ( coverage.getCoordinateSystem().hasTimeAxis() )
{
domainSetElem.addContent( genTemporalDomainElem( coverage.getCoordinateSystem().getTimeAxis1D() ) );
}
return domainSetElem;
}
private Element genSpatialDomainElem( WcsCoverage coverage )
{
// ../domainSet/spatialDomain
Element spatialDomainElem = new Element( "spatialDomain", wcsNS );
// ../domainSet/spatialDomain/gml:Envelope [1..*]
spatialDomainElem.addContent( this.genEnvelopeElem( coverage.getCoordinateSystem()));
// ../domainSet/spatialDomain/gml:RectifiedGrid [0..*]
spatialDomainElem.addContent( this.genRectifiedGridElem( coverage));
// ../domainSet/spatialDomain/gml:Polygon [0..*]
return spatialDomainElem;
}
private Element genRectifiedGridElem( WcsCoverage coverage )
{
// ../spatialDomain/gml:RectifiedGrid
Element rectifiedGridElem = new Element( "RectifiedGrid", gmlNS);
CoordinateAxis1D xaxis = (CoordinateAxis1D) coverage.getCoordinateSystem().getXHorizAxis();
CoordinateAxis1D yaxis = (CoordinateAxis1D) coverage.getCoordinateSystem().getYHorizAxis();
CoordinateAxis1D zaxis = coverage.getCoordinateSystem().getVerticalAxis();
// ../spatialDomain/gml:RectifiedGrid@srsName [0..1] (URI)
rectifiedGridElem.setAttribute( "srsName", coverage.getNativeCrs() );
// ../spatialDomain/gml:RectifiedGrid@dimension [1] (positive integer)
int ndim = ( zaxis != null ) ? 3 : 2;
rectifiedGridElem.setAttribute( "dimension", Integer.toString( ndim ) );
// ../spatialDomain/gml:RectifiedGrid/gml:limits [1]
int[] minValues = new int[ndim];
int[] maxValues = new int[ndim];
maxValues[0] = (int) ( xaxis.getSize() - 1 );
maxValues[1] = (int) ( yaxis.getSize() - 1 );
if ( zaxis != null )
maxValues[2] = (int) ( zaxis.getSize() - 1 );
Element limitsElem = new Element( "limits", gmlNS);
// ../spatialDomain/gml:RectifiedGrid/gml:limits/gml:GridEnvelope [1]
// ../spatialDomain/gml:RectifiedGrid/gml:limits/gml:GridEnvelope/gml:low [1] (integer list)
// ../spatialDomain/gml:RectifiedGrid/gml:limits/gml:GridEnvelope/gml:high [1] (integer list)
limitsElem.addContent(
new Element( "GridEnvelope", gmlNS)
.addContent( new Element( "low", gmlNS ).addContent( genIntegerListString( minValues)))
.addContent( new Element( "high", gmlNS).addContent( genIntegerListString( maxValues))) );
rectifiedGridElem.addContent( limitsElem);
// ../spatialDomain/gml:RectifiedGrid/gml:axisName [1..*] (string)
rectifiedGridElem.addContent( new Element( "axisName", gmlNS).addContent( "x"));
rectifiedGridElem.addContent( new Element( "axisName", gmlNS).addContent( "y"));
if ( zaxis != null )
rectifiedGridElem.addContent( new Element( "axisName", gmlNS ).addContent( "z" ) );
// ../spatialDomain/gml:RectifiedGrid/gml:origin [1]
// ../spatialDomain/gml:RectifiedGrid/gml:origin/gml:pos [1] (space seperated list of double values)
// ../spatialDomain/gml:RectifiedGrid/gml:origin/gml:pos@dimension [0..1] (number of entries in list)
double[] origin = new double[ndim];
origin[0] = xaxis.getStart();
origin[1] = yaxis.getStart();
if ( zaxis != null )
origin[2] = zaxis.getStart();
rectifiedGridElem.addContent(
new Element( "origin", gmlNS).addContent(
new Element( "pos", gmlNS).addContent( genDoubleListString( origin))));
// ../spatialDomain/gml:RectifiedGrid/gml:offsetVector [1..*] (space seperated list of double values)
// ../spatialDomain/gml:RectifiedGrid/gml:offsetVector@dimension [0..1] (number of entries in list)
double[] xoffset = new double[ndim];
xoffset[0] = xaxis.getIncrement();
rectifiedGridElem.addContent(
new Element( "offsetVector", gmlNS)
.addContent( genDoubleListString( xoffset)));
double[] yoffset = new double[ndim];
yoffset[1] = yaxis.getIncrement();
rectifiedGridElem.addContent(
new Element( "offsetVector", gmlNS )
.addContent( genDoubleListString( yoffset ) ) );
if ( zaxis != null )
{
double[] zoffset = new double[ndim];
zoffset[2] = zaxis.getIncrement();
rectifiedGridElem.addContent(
new Element( "offsetVector", gmlNS )
.addContent( genDoubleListString( zoffset ) ) );
}
return rectifiedGridElem;
}
private String genIntegerListString( int[] values)
{
StringBuffer buf = new StringBuffer();
for ( int intValue : values )
{
if ( buf.length() > 0 )
buf.append( " ");
buf.append( intValue);
}
return buf.toString();
}
private String genDoubleListString( double[] values)
{
StringBuffer buf = new StringBuffer();
for ( double doubleValue : values )
{
if ( buf.length() > 0 )
buf.append( " ");
buf.append( doubleValue);
}
return buf.toString();
}
private Element genEnvelopeElem( GridCoordSystem gcs )
{
// spatialDomain/Envelope
Element envelopeElem;
if ( gcs.hasTimeAxis() )
envelopeElem = new Element( "EnvelopeWithTimePeriod", wcsNS );
else
envelopeElem = new Element( "Envelope", wcsNS );
// spatialDomain/Envelope@srsName [0..1] (URI)
envelopeElem.setAttribute( "srsName", "urn:ogc:def:crs:OGC:1.3:CRS84" );
LatLonRect llbb = gcs.getLatLonBoundingBox();
LatLonPoint llpt = llbb.getLowerLeftPoint();
LatLonPoint urpt = llbb.getUpperRightPoint();
double lon = llpt.getLongitude() + llbb.getWidth();
int posDim = 2;
String firstPosition = llpt.getLongitude() + " " + llpt.getLatitude();
String secondPosition = lon + " " + urpt.getLatitude();
// ToDo WCS 1.0Plus - Add vertical (Deal with conversion to meters. Yikes!!)
// CoordinateAxis1D vertAxis = gcs.getVerticalAxis();
// if ( vertAxis != null )
// {
// // See verAxis.getUnitsString()
// posDim++;
// firstPosition += " " + vertAxis.getCoordValue( 0);
// secondPosition += " " + vertAxis.getCoordValue( ((int)vertAxis.getSize()) - 1);
// }
String posDimString = Integer.toString( posDim );
// spatialDomain/Envelope/gml:pos [2] (space seperated list of double values)
// spatialDomain/Envelope/gml:pos@dimension [0..1] (number of entries in list)
envelopeElem.addContent(
new Element( "pos", gmlNS )
.addContent( firstPosition )
.setAttribute( new Attribute( "dimension", posDimString) ) );
envelopeElem.addContent(
new Element( "pos", gmlNS )
.addContent( secondPosition )
.setAttribute( new Attribute( "dimension", posDimString ) ) );
// spatialDomain/Envelope/gml:timePostion [2]
if ( gcs.hasTimeAxis() )
{
envelopeElem.addContent(
new Element( "timePosition", gmlNS).addContent(
gcs.getDateRange().getStart().toDateTimeStringISO()));
envelopeElem.addContent(
new Element( "timePosition", gmlNS).addContent(
gcs.getDateRange().getEnd().toDateTimeStringISO()));
}
return envelopeElem;
}
private Element genTemporalDomainElem( CoordinateAxis1DTime timeAxis )
{
// temporalDomain
Element temporalDomainElem = new Element( "temporalDomain", wcsNS );
Date[] dates = timeAxis.getTimeDates();
DateFormatter formatter = new DateFormatter();
// temporalDomain/timePosition [1..*]
for ( Date curDate : dates )
{
temporalDomainElem.addContent(
new Element( "timePosition", gmlNS)
.addContent( formatter.toDateTimeStringISO( curDate )));
}
return temporalDomainElem;
}
private Element genRangeSetElem( WcsCoverage coverage )
{
WcsRangeField rangeField = coverage.getRangeField();
// rangeSet
Element rangeSetElem = new Element( "rangeSet", wcsNS);
// rangeSet/RangeSet
// rangeSet/RangeSet@semantic
// rangeSet/RangeSet@refSys
// rangeSet/RangeSet@refSysLabel
Element innerRangeSetElem = new Element( "RangeSet", wcsNS);
// rangeSet/RangeSet/description [0..1]
if ( rangeField.getDescription() != null )
innerRangeSetElem.addContent(
new Element( "description")
.addContent( rangeField.getDescription() ) );
// rangeSet/RangeSet/name [1]
innerRangeSetElem.addContent(
new Element( "name", wcsNS).addContent( rangeField.getName()));
// rangeSet/RangeSet/label [1]
innerRangeSetElem.addContent(
new Element( "label", wcsNS ).addContent( rangeField.getLabel() ) );
WcsRangeField.Axis vertAxis = rangeField.getAxis();
if ( vertAxis != null )
{
// rangeSet/RangeSet/axisDescription [0..*]
Element axisDescElem = new Element( "axisDescription", wcsNS );
// rangeSet/RangeSet/axisDescription/AxisDescription [1]
Element innerAxisDescElem = new Element( "AxisDescription", wcsNS);
// rangeSet/RangeSet/axisDescription/AxisDescription/name [1]
// rangeSet/RangeSet/axisDescription/AxisDescription/label [1]
innerAxisDescElem.addContent( new Element( "name", wcsNS).addContent( vertAxis.getName() ));
innerAxisDescElem.addContent( new Element( "label", wcsNS).addContent( vertAxis.getLabel()));
// rangeSet/RangeSet/axisDescription/AxisDescription/values [1]
Element valuesElem = new Element( "values", wcsNS);
// rangeSet/RangeSet/axisDescription/AxisDescription/values/singleValue [1..*]
// ----- interval is alternate for singleValue
// rangeSet/RangeSet/axisDescription/AxisDescription/values/interval
// rangeSet/RangeSet/axisDescription/AxisDescription/values/interval/min [0..1]
// rangeSet/RangeSet/axisDescription/AxisDescription/values/interval/max [0..1]
// rangeSet/RangeSet/axisDescription/AxisDescription/values/interval/res [0..1]
// -----
for ( String curVal : vertAxis.getValues())
valuesElem.addContent(
new Element( "singleValue", wcsNS)
.addContent( curVal));
// rangeSet/RangeSet/axisDescription/AxisDescription/values/default [0..1]
innerAxisDescElem.addContent( valuesElem);
axisDescElem.addContent( innerAxisDescElem);
innerRangeSetElem.addContent( axisDescElem);
}
// rangeSet/RangeSet/nullValues [0..1]
// rangeSet/RangeSet/nullValues/{interval|singleValue} [1..*]
if ( coverage.hasMissingData() )
{
innerRangeSetElem.addContent(
new Element( "nullValues", wcsNS).addContent(
new Element( "singleValue", wcsNS)
// ToDo Is missing always NaN?
.addContent( "NaN" ) ) );
}
return rangeSetElem.addContent( innerRangeSetElem);
}
private Element genSupportedCRSsElem( WcsCoverage coverage )
{
// supportedCRSs
Element supportedCRSsElem = new Element( "supportedCRSs", wcsNS);
// supportedCRSs/requestCRSs [1..*] (wcs) (space seperated list of strings)
// supportedCRSs/requestCRSs@codeSpace [0..1] (URI)
supportedCRSsElem.addContent(
new Element( "requestCRSs", wcsNS)
.addContent( coverage.getDefaultRequestCrs()));
// supportedCRSs/responseCRSs [1..*] (wcs) (space seperated list of strings)
// supportedCRSs/responseCRSs@codeSpace [0..1] (URI)
supportedCRSsElem.addContent(
new Element( "responseCRSs", wcsNS)
.addContent( coverage.getNativeCrs()));
return supportedCRSsElem;
}
private Element genSupportedFormatsElem( WcsCoverage coverage)
{
// supportedFormats
// supportedFormats@nativeFormat [0..1] (string)
Element supportedFormatsElem = new Element( "supportedFormats", wcsNS );
// supportedFormats/formats [1..*] (wcs) (space seperated list of strings)
// supportedFormats/formats@codeSpace [0..1] (URI)
for ( Request.Format curFormat : coverage.getSupportedCoverageFormatList())
{
supportedFormatsElem.addContent(
new Element( "formats", wcsNS)
.addContent( curFormat.toString()));
}
return supportedFormatsElem;
}
private Element genSupportedInterpolationsElem()
{
// supportedInterpolations
// supportedInterpolations@default [0..1] ???
Element supportedInterpolationsElem = new Element( "supportedInterpolations", wcsNS);
// supportedInterpolations/interpolationMethod [1..*]
supportedInterpolationsElem.addContent(
new Element( "interpolationMethod", wcsNS)
.addContent( "none"));
return supportedInterpolationsElem;
}
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