/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.geoserver.wcs.kvp;
import static org.vfny.geoserver.wcs.WcsException.WcsExceptionCode.InvalidParameterValue;
import static org.vfny.geoserver.wcs.WcsException.WcsExceptionCode.MissingParameterValue;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;
import net.opengis.gml.CodeType;
import net.opengis.gml.DirectPositionType;
import net.opengis.gml.Gml4wcsFactory;
import net.opengis.gml.PointType;
import net.opengis.gml.RectifiedGridType;
import net.opengis.gml.TimePositionType;
import net.opengis.gml.VectorType;
import net.opengis.wcs10.AxisSubsetType;
import net.opengis.wcs10.DomainSubsetType;
import net.opengis.wcs10.GetCoverageType;
import net.opengis.wcs10.IntervalType;
import net.opengis.wcs10.OutputType;
import net.opengis.wcs10.RangeSubsetType;
import net.opengis.wcs10.SpatialSubsetType;
import net.opengis.wcs10.TimeSequenceType;
import net.opengis.wcs10.TypedLiteralType;
import net.opengis.wcs10.Wcs10Factory;
import org.geoserver.catalog.Catalog;
import org.geoserver.ows.kvp.EMFKvpRequestReader;
import org.geoserver.ows.util.KvpUtils;
import org.geoserver.ows.util.RequestUtils;
import org.geoserver.ows.util.KvpUtils.Tokenizer;
import org.geotools.coverage.grid.GridEnvelope2D;
import org.geotools.geometry.GeneralEnvelope;
import org.geotools.referencing.CRS;
import org.geotools.referencing.crs.DefaultGeographicCRS;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.cs.AxisDirection;
import org.opengis.referencing.cs.CoordinateSystem;
import org.vfny.geoserver.wcs.WcsException;
import org.vfny.geoserver.wcs.WcsException.WcsExceptionCode;
/**
* GetCoverage request reader for WCS 1.0.0
*
* @author Simone Giannecchini, GeoSolutions SAS
*
*/
public class Wcs10GetCoverageRequestReader extends EMFKvpRequestReader {
public static final String VERSION = "1.0.0";
Catalog catalog;
public Wcs10GetCoverageRequestReader(Catalog catalog) {
super(GetCoverageType.class, Wcs10Factory.eINSTANCE);
this.catalog = catalog;
}
@Override
public Object read(Object request, Map kvp, Map rawKvp) throws Exception {
GetCoverageType getCoverage = (GetCoverageType) super.read(request, kvp, rawKvp);
// grab coverage info to perform further checks
if (getCoverage.getSourceCoverage() == null) {
if (kvp.get("coverage") == null)
throw new WcsException("source coverage parameter is mandatory",
MissingParameterValue, "source coverage");
else
getCoverage.setSourceCoverage((String) ((List) kvp.get("coverage")).get(0));
}
// if not specified, throw a resounding exception (by spec)
if (!getCoverage.isSetVersion())
throw new WcsException("Version has not been specified",
WcsExceptionCode.MissingParameterValue, "version");
// do the version negotiation dance
List<String> provided = new ArrayList<String>();
provided.add(Wcs10GetCoverageRequestReader.VERSION);
List<String> accepted = null;
if (getCoverage.getVersion() != null) {
accepted = new ArrayList<String>();
accepted.add(getCoverage.getVersion());
}
String version = RequestUtils.getVersionPreOws(provided, accepted);
if (!Wcs10GetCoverageRequestReader.VERSION.equals(version)) {
throw new WcsException("An invalid version number has been specified",
WcsExceptionCode.InvalidParameterValue, "version");
}
getCoverage.setVersion(Wcs10GetCoverageRequestReader.VERSION);
// build the domain subset
getCoverage.setDomainSubset(parseDomainSubset(kvp));
// build the range subset
getCoverage.setRangeSubset(parseRangeSubset(kvp, getCoverage.getSourceCoverage()));
// build output element
getCoverage.setOutput(parseOutputElement(kvp));
return getCoverage;
}
/**
*
* @param kvp
* @return
*/
private DomainSubsetType parseDomainSubset(Map kvp) {
final DomainSubsetType domainSubset = Wcs10Factory.eINSTANCE.createDomainSubsetType();
final SpatialSubsetType spatialSubset = Wcs10Factory.eINSTANCE.createSpatialSubsetType();
//
// check for CRS
//
String crsName = (String) kvp.get("crs");
if (crsName == null)
throw new WcsException("CRS parameter is mandatory", MissingParameterValue, "crs");
final CoordinateReferenceSystem crs = decodeCRS100(crsName);
if(crs==null)
throw new WcsException("CRS parameter is invalid:"+crsName,InvalidParameterValue , "crs");
// final VerticalCRS verticalCRS = CRS.getVerticalCRS(crs);
// final boolean hasVerticalCRS = verticalCRS != null;
//
// at least one between BBOX and TIME must be there
//
final GeneralEnvelope bbox = (GeneralEnvelope) kvp.get("BBOX");
if (bbox == null)
throw new WcsException("bbox parameter is mandatory", MissingParameterValue, "bbox");
// afabiani: consider Elevation as band, forcing the bbox to be 2D only
if (bbox.getDimension() != 2)
throw new WcsException("Requested bounding box is not 2-dimensional: " + bbox.getDimension(), InvalidParameterValue, "bbox");
final GeneralEnvelope envelope = new GeneralEnvelope(/* TODO: ignore 3D CRS for now crs */ bbox.getDimension() == 3 ? DefaultGeographicCRS.WGS84_3D : crs);
if (/* TODO: ignore 3D CRS for now !hasVerticalCRS */ bbox.getDimension() == 2)
envelope.setEnvelope(bbox.getLowerCorner().getOrdinate(0), bbox.getLowerCorner()
.getOrdinate(1), bbox.getUpperCorner().getOrdinate(0), bbox.getUpperCorner()
.getOrdinate(1));
// else if (/* TODO: ignore 3D CRS for now hasVerticalCRS */ bbox.getDimension() == 3)
// // 3D
// envelope.setEnvelope(bbox.getLowerCorner().getOrdinate(0), bbox.getLowerCorner()
// .getOrdinate(1), bbox.getLowerCorner().getOrdinate(2), bbox.getUpperCorner()
// .getOrdinate(0), bbox.getUpperCorner().getOrdinate(1), bbox.getUpperCorner()
// .getOrdinate(2));
else
throw new WcsException("bbox not compliant with the specified CRS", InvalidParameterValue, "bbox");
//
// TIME
//
TimeSequenceType timeSequence = null;
Object time = kvp.get("TIME");
if (time != null && time instanceof TimeSequenceType) {
timeSequence = (TimeSequenceType) time;
} else if (time != null && time instanceof List) {
timeSequence = Wcs10Factory.eINSTANCE.createTimeSequenceType();
for (Date tPos : (List<Date>) time) {
final TimePositionType timePosition = Gml4wcsFactory.eINSTANCE
.createTimePositionType();
timePosition.setValue(tPos);
timeSequence.getTimePosition().add(timePosition);
}
}
if (timeSequence == null && bbox == null)
throw new WcsException("Bounding box cannot be null, TIME has not been specified",
WcsExceptionCode.MissingParameterValue, "BBOX");
//
// GRID management
//
final RectifiedGridType grid = Gml4wcsFactory.eINSTANCE.createRectifiedGridType();
final Object w = kvp.get("width");
final Object h = kvp.get("height");
if (w != null && h != null) {
//
// normal grid management, only the envelope and the raster dimensions have been specified,
// we need to compute RESX, RESY, RESZ afterwards
//
// get W and H
int width = w instanceof Integer?((Integer)w):Integer.parseInt((String)w);
int height =w instanceof Integer?((Integer)h):Integer.parseInt((String)h);
grid.getAxisName().add("x");
grid.getAxisName().add("y");
final Object d = kvp.get("depth");
if (d != null) {
// afabiani: we consider 2D grdis only
throw new WcsException("3D grids are not supported.", InvalidParameterValue, "depth");
// // check that the envelope is 3D or throw an error
// if (bbox.getDimension() != 3)
// throw new WcsException("Found depth but envelope is of dimension "
// + bbox.getDimension(), InvalidParameterValue, "");
//
// // notice that as for the spec this element represents the number of ticks on the
// // third dimension
// grid.getAxisName().add("z");
//
// final int depth = Integer.parseInt((String) d);
// grid.setDimension(BigInteger.valueOf(3));
// // notice that the third element indicates how many layers we do have requested on the third dimension
// grid.setLimits(new GeneralGridEnvelope(new int[] { 0, 0, 0 }, new int[] {width, height, depth }, false));
//
//
// // 3D grid
// grid.setDimension(BigInteger.valueOf(3));
} else {
// 2d grid
grid.setDimension(BigInteger.valueOf(2));
grid.setLimits(new GridEnvelope2D(0, 0, width, height));
}
} else {
//
// we might be working with a rectified grid request there we need
// to try and use that type. we cannot build a raster grid at this
// stage yet since we have no idea about how the envelope will be intersected with the
// native envelope for this raster
//
final Object rx = kvp.get("resx");
final Object ry = kvp.get("resy");
if (rx != null && ry != null) {
// get resx e resy but correct also the sign for them taking into account
final CoordinateSystem cs=crs.getCoordinateSystem();
final AxisDirection northingDirection=cs.getAxis(1).getDirection();
final int yAxisCorrection=AxisDirection.NORTH.equals(northingDirection)?-1:1;
final AxisDirection eastingDirection=cs.getAxis(0).getDirection();
final int xAxisCorrection=AxisDirection.EAST.equals(eastingDirection)?1:-1;
final double resX = Double.parseDouble((String) rx)*xAxisCorrection;
final double resY = Double.parseDouble((String) ry)*yAxisCorrection;
// now compute offset vector for the transform from the envelope
// Following ISO 19123 we use the CELL_CENTER convention but with the raster
final double origX = envelope.getLowerCorner().getOrdinate(0)+resX/2;
final double origY = envelope.getUpperCorner().getOrdinate(1)+resY/2;
// create offset point
final PointType origin = Gml4wcsFactory.eINSTANCE.createPointType();
final DirectPositionType dp = Gml4wcsFactory.eINSTANCE.createDirectPositionType();
origin.setPos(dp);
origin.setSrsName(crsName);
// create resolutions vector
final VectorType resolutionVector = Gml4wcsFactory.eINSTANCE.createVectorType();
//
// Third dimension management
//
final Object rz = kvp.get("resz");
if (rz != null) {
// afabiani: we consider 2D grdis only
throw new WcsException("3D grids are not supported.", InvalidParameterValue, "resz");
// // eventual depth
// final double resZ = Double.parseDouble((String) rz);
// // check that the envelope is 3D or throw an error
// if (bbox.getDimension() != 3)
// throw new WcsException("Found ResZ but envelope is of dimension "
// + bbox.getDimension(), InvalidParameterValue, "");
// final double origZ = bbox.getLowerCorner().getOrdinate(2);
//
// // 3D grid
// grid.setDimension(BigInteger.valueOf(3));
// // set the origin position
// dp.setDimension(grid.getDimension());
// dp.setValue(Arrays.asList(origX, origY, origZ));
// grid.setOrigin(origin);
//
// // set the resolution vector
// resolutionVector.setDimension(grid.getDimension());
// resolutionVector.setValue(Arrays.asList(resX, resY, resZ));
// grid.getOffsetVector().add(resolutionVector);
} else {
// 2d grid
grid.setDimension(BigInteger.valueOf(2));
// set the origin position
dp.setDimension(grid.getDimension());
dp.setValue(Arrays.asList(origX, origY));
grid.setOrigin(origin);
// set the resolution vector
resolutionVector.setDimension(grid.getDimension());
resolutionVector.setValue(Arrays.asList(resX, resY));
grid.getOffsetVector().add(resolutionVector);
}
} else
throw new WcsException("Could not recognize grid resolution",
InvalidParameterValue, "");
}
spatialSubset.getEnvelope().add(envelope);
spatialSubset.getGrid().add(grid);
domainSubset.setSpatialSubset(spatialSubset);
domainSubset.setTemporalSubset(timeSequence);
return domainSubset;
}
private RangeSubsetType parseRangeSubset(Map kvp, String coverageName) {
final RangeSubsetType rangeSubset = Wcs10Factory.eINSTANCE.createRangeSubsetType();
if (kvp.get("Band") != null) {
Object axis = kvp.get("Band");
if (axis instanceof AxisSubsetType) {
rangeSubset.getAxisSubset().add(axis);
} else
checkTypeAxisRange(rangeSubset, axis, "Band");
}
if (kvp.get("ELEVATION") != null) {
Object axis = kvp.get("ELEVATION");
if (axis instanceof AxisSubsetType) {
rangeSubset.getAxisSubset().add(axis);
} else
checkTypeAxisRange(rangeSubset, axis, "ELEVATION");
}
return rangeSubset;
}
/**
* @param rangeSubset
* @param axis
*/
private void checkTypeAxisRange(final RangeSubsetType rangeSubset, Object axis, String axisName) {
if (axis instanceof String) {
String bands = (String) axis;
if (bands != null) {
if (bands.contains("/")) {
List<String> unparsed = KvpUtils.readFlat(bands, new Tokenizer("/"));
IntervalType interval = Wcs10Factory.eINSTANCE.createIntervalType();
TypedLiteralType min = Wcs10Factory.eINSTANCE.createTypedLiteralType();
TypedLiteralType max = Wcs10Factory.eINSTANCE.createTypedLiteralType();
TypedLiteralType res = Wcs10Factory.eINSTANCE.createTypedLiteralType();
if (unparsed.size() == 2) {
min.setValue(unparsed.get(0));
max.setValue(unparsed.get(1));
interval.setMin(min);
interval.setMax(max);
} else {
min.setValue(unparsed.get(0));
max.setValue(unparsed.get(1));
res.setValue(unparsed.get(2));
interval.setMin(min);
interval.setMax(max);
interval.setRes(res);
}
final AxisSubsetType axisSubset = Wcs10Factory.eINSTANCE.createAxisSubsetType();
axisSubset.setName(axisName);
axisSubset.getInterval().add(interval);
rangeSubset.getAxisSubset().add(axisSubset);
} else {
List<String> unparsed = KvpUtils.readFlat(bands, KvpUtils.INNER_DELIMETER);
if (unparsed.size() == 0) {
throw new WcsException(
"Requested axis subset contains wrong number of values (should have at least 1): "
+ unparsed.size(), WcsExceptionCode.InvalidParameterValue,
"band");
}
final AxisSubsetType axisSubset = Wcs10Factory.eINSTANCE.createAxisSubsetType();
axisSubset.setName(axisName);
for (String bandValue : unparsed) {
TypedLiteralType singleValue = Wcs10Factory.eINSTANCE.createTypedLiteralType();
singleValue.setValue(bandValue);
axisSubset.getSingleValue().add(singleValue);
}
rangeSubset.getAxisSubset().add(axisSubset);
}
}
} else if (axis instanceof Double || axis instanceof Integer) {
final AxisSubsetType axisSubset = Wcs10Factory.eINSTANCE.createAxisSubsetType();
axisSubset.setName(axisName);
TypedLiteralType singleValue = Wcs10Factory.eINSTANCE.createTypedLiteralType();
singleValue.setValue(String.valueOf(axis));
axisSubset.getSingleValue().add(singleValue);
rangeSubset.getAxisSubset().add(axisSubset);
}
}
private OutputType parseOutputElement(final Map<String,String> kvp) throws Exception {
final OutputType output = Wcs10Factory.eINSTANCE.createOutputType();
final CodeType crsType = Gml4wcsFactory.eINSTANCE.createCodeType();
final CodeType formatType = Gml4wcsFactory.eINSTANCE.createCodeType();
// check and set format
String format = (String) kvp.get("format");
if (format == null)
throw new WcsException("format parameter is mandatory", MissingParameterValue, "format");
final String crsName = (String) (kvp.get("response_crs") != null ? kvp.get("response_crs") : kvp.get("crs"));
CoordinateReferenceSystem crs = null;
if (crsName != null) {
crs = decodeCRS100(crsName);
crsType.setValue(CRS.lookupIdentifier(crs, true));
output.setCrs(crsType);
}
formatType.setValue(format);
output.setFormat(formatType);
return output;
}
/**
* DEcode the requested CRS following the WCS 1.0 style with LON,LAT axes order.
*
* @param crsName
* @return
*/
private static CoordinateReferenceSystem decodeCRS100(String crsName) throws WcsException{
if ("WGS84(DD)".equals(crsName)) {
crsName = "EPSG:4326";
}
try {
// in 100 we work with Lon,Lat always
return CRS.decode(crsName, true);
} catch (NoSuchAuthorityCodeException e) {
throw new WcsException("Could not recognize crs " + crsName, InvalidParameterValue,"crs");
} catch (FactoryException e) {
throw new WcsException("Could not recognize crs " + crsName, InvalidParameterValue,"crs");
}
}
}