package org.geoserver.wcs;
import static org.vfny.geoserver.wcs.WcsException.WcsExceptionCode.*;
import java.awt.geom.AffineTransform;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TimeZone;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.media.jai.Interpolation;
import net.opengis.ows11.BoundingBoxType;
import net.opengis.ows11.CodeType;
import net.opengis.wcs11.AxisSubsetType;
import net.opengis.wcs11.DescribeCoverageType;
import net.opengis.wcs11.DomainSubsetType;
import net.opengis.wcs11.FieldSubsetType;
import net.opengis.wcs11.GetCapabilitiesType;
import net.opengis.wcs11.GetCoverageType;
import net.opengis.wcs11.GridCrsType;
import net.opengis.wcs11.OutputType;
import net.opengis.wcs11.RangeSubsetType;
import net.opengis.wcs11.TimePeriodType;
import net.opengis.wcs11.TimeSequenceType;
import org.geoserver.catalog.Catalog;
import org.geoserver.catalog.CoverageDimensionInfo;
import org.geoserver.catalog.CoverageInfo;
import org.geoserver.config.GeoServer;
import org.geoserver.data.util.CoverageUtils;
import org.geoserver.ows.util.RequestUtils;
import org.geoserver.wcs.kvp.GridCS;
import org.geoserver.wcs.kvp.GridType;
import org.geoserver.wcs.response.DescribeCoverageTransformer;
import org.geoserver.wcs.response.WCSCapsTransformer;
import org.geotools.coverage.grid.GeneralGridGeometry;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridGeometry2D;
import org.geotools.coverage.grid.io.AbstractGridCoverage2DReader;
import org.geotools.coverage.grid.io.AbstractGridFormat;
import org.geotools.geometry.GeneralEnvelope;
import org.geotools.gml2.bindings.GML2EncodingUtils;
import org.geotools.parameter.DefaultParameterDescriptor;
import org.geotools.referencing.CRS;
import org.geotools.referencing.operation.transform.AffineTransform2D;
import org.geotools.referencing.operation.transform.IdentityTransform;
import org.geotools.util.logging.Logging;
import org.opengis.coverage.grid.GridCoverage;
import org.opengis.filter.Filter;
import org.opengis.geometry.Envelope;
import org.opengis.parameter.GeneralParameterDescriptor;
import org.opengis.parameter.GeneralParameterValue;
import org.opengis.parameter.ParameterValue;
import org.opengis.parameter.ParameterValueGroup;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.crs.GeographicCRS;
import org.opengis.referencing.cs.AxisDirection;
import org.opengis.referencing.cs.CoordinateSystemAxis;
import org.opengis.referencing.datum.PixelInCell;
import org.opengis.referencing.operation.CoordinateOperation;
import org.opengis.referencing.operation.CoordinateOperationFactory;
import org.opengis.referencing.operation.MathTransform;
import org.vfny.geoserver.util.WCSUtils;
import org.vfny.geoserver.wcs.WcsException;
import org.vfny.geoserver.wcs.WcsException.WcsExceptionCode;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegate;
import org.vfny.geoserver.wcs.responses.CoverageResponseDelegateFactory;
public class DefaultWebCoverageService111 implements WebCoverageService111 {
Logger LOGGER = Logging.getLogger(DefaultWebCoverageService111.class);
private Catalog catalog;
private GeoServer geoServer;
public DefaultWebCoverageService111(GeoServer geoServer) {
this.geoServer = geoServer;
this.catalog = geoServer.getCatalog();
}
public WCSInfo getServiceInfo() {
return geoServer.getService(WCSInfo.class);
}
public WCSCapsTransformer getCapabilities(GetCapabilitiesType request) {
// do the version negotiation dance
List<String> provided = new ArrayList<String>();
// provided.add("1.0.0");
provided.add("1.1.0");
provided.add("1.1.1");
List<String> accepted = null;
if (request.getAcceptVersions() != null)
accepted = request.getAcceptVersions().getVersion();
String version = RequestUtils.getVersionOws11(provided, accepted);
// TODO: add support for 1.0.0 in here
if ("1.1.0".equals(version) || "1.1.1".equals(version)) {
WCSCapsTransformer capsTransformer = new WCSCapsTransformer(geoServer);
capsTransformer.setEncoding(Charset.forName((getServiceInfo().getGeoServer().getGlobal().getCharset())));
return capsTransformer;
}
throw new WcsException("Could not understand version:" + version);
}
public DescribeCoverageTransformer describeCoverage(DescribeCoverageType request) {
final String version = request.getVersion();
if ("1.1.0".equals(version) || "1.1.1".equals(version)) {
WCSInfo wcs = getServiceInfo();
DescribeCoverageTransformer describeTransformer = new DescribeCoverageTransformer(wcs, catalog);
describeTransformer.setEncoding(Charset.forName(wcs.getGeoServer().getGlobal().getCharset()));
return describeTransformer;
}
throw new WcsException("Could not understand version:" + version);
}
@SuppressWarnings({ "deprecation", "unchecked" })
public GridCoverage[] getCoverage(GetCoverageType request) {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.finest(new StringBuffer("execute CoverageRequest response. Called request is: ").append(request).toString());
}
WCSInfo wcs = getServiceInfo();
CoverageInfo meta = null;
GridCoverage2D coverage = null;
try {
CodeType identifier = request.getIdentifier();
if (identifier == null)
throw new WcsException("Internal error, the coverage identifier must not be null", InvalidParameterValue, "identifier");
meta = catalog.getCoverageByName(identifier.getValue());
if (meta == null) {
throw new WcsException("No such coverage: " + request.getIdentifier().getValue());
}
// first let's run some sanity checks on the inputs
checkDomainSubset(meta, request.getDomainSubset(), wcs);
checkRangeSubset(meta, request.getRangeSubset());
checkOutput(meta, request.getOutput());
// grab the format, the reader using the default params
final AbstractGridCoverage2DReader reader = (AbstractGridCoverage2DReader) meta.getGridCoverageReader(null, WCSUtils.getReaderHints(wcs));
// handle spatial domain subset, if needed
final GeneralEnvelope originalEnvelope = reader.getOriginalEnvelope();
final BoundingBoxType bbox = request.getDomainSubset().getBoundingBox();
final CoordinateReferenceSystem nativeCRS = originalEnvelope.getCoordinateReferenceSystem();
final GeneralEnvelope requestedEnvelopeInSourceCRS;
final GeneralEnvelope requestedEnvelope;
MathTransform bboxToNativeTx=null;
if (bbox != null) {
// first off, parse the envelope corners
double[] lowerCorner = new double[bbox.getLowerCorner().size()];
double[] upperCorner = new double[bbox.getUpperCorner().size()];
for (int i = 0; i < lowerCorner.length; i++) {
lowerCorner[i] = (Double) bbox.getLowerCorner().get(i);
upperCorner[i] = (Double) bbox.getUpperCorner().get(i);
}
requestedEnvelope = new GeneralEnvelope(lowerCorner, upperCorner);
// grab the native crs
// if no crs has beens specified, the native one is assumed
if (bbox.getCrs() == null) {
requestedEnvelope.setCoordinateReferenceSystem(nativeCRS);
requestedEnvelopeInSourceCRS = requestedEnvelope;
} else {
// otherwise we need to transform
final CoordinateReferenceSystem bboxCRS = CRS.decode(bbox.getCrs());
requestedEnvelope.setCoordinateReferenceSystem(bboxCRS);
bboxToNativeTx = CRS.findMathTransform(bboxCRS, nativeCRS,true);
if(!bboxToNativeTx.isIdentity()){
requestedEnvelopeInSourceCRS = CRS.transform(bboxToNativeTx,requestedEnvelope);
requestedEnvelopeInSourceCRS.setCoordinateReferenceSystem(nativeCRS);
}
else
requestedEnvelopeInSourceCRS= new GeneralEnvelope(requestedEnvelope);
}
} else {
requestedEnvelopeInSourceCRS = reader.getOriginalEnvelope();
requestedEnvelope = requestedEnvelopeInSourceCRS;
}
final GridCrsType gridCRS = request.getOutput().getGridCRS();
// Compute the target crs, the crs that the final coverage will be
// served into
final CoordinateReferenceSystem targetCRS;
if (gridCRS == null)
targetCRS = reader.getOriginalEnvelope().getCoordinateReferenceSystem();
else
targetCRS = CRS.decode(gridCRS.getGridBaseCRS());
//
// Raster destination size
//
int elevationLevels=0;
double[] elevations = null;
// grab the grid to world transformation
MathTransform gridToCRS = reader.getOriginalGridToWorld(PixelInCell.CELL_CORNER);
if (gridCRS != null) {
Double[] origin = (Double[]) gridCRS.getGridOrigin();
Double[] offsets = (Double[]) gridCRS.getGridOffsets();
// from the specification if grid origin is omitted and the crs
// is 2d the default it's 0,0
if (origin == null) {
origin = new Double[] { 0.0, 0.0 };
}
// if no offsets has been specified we try to default on the
// native ones
if (offsets == null) {
if (!(gridToCRS instanceof AffineTransform2D)&& !(gridToCRS instanceof IdentityTransform))
throw new WcsException(
"Internal error, the coverage we're playing with does not have an affine transform...");
if (gridToCRS instanceof IdentityTransform) {
if (gridCRS.getGridType().equals(GridType.GT2dSimpleGrid.getXmlConstant()) ||
gridCRS.getGridType().equals(GridType.GT2dGridIn2dCrs.getXmlConstant()))
offsets = new Double[] { 1.0, 1.0 };
else
offsets = new Double[] { 1.0, 0.0, 0.0, 0.0, 1.0, 0.0 };
} else {
AffineTransform2D affine = (AffineTransform2D) gridToCRS;
if (gridCRS.getGridType().equals(GridType.GT2dSimpleGrid.getXmlConstant()) ||
gridCRS.getGridType().equals(GridType.GT2dGridIn2dCrs.getXmlConstant()))
offsets = new Double[] { affine.getScaleX(), affine.getScaleY() };
else
offsets = new Double[] { affine.getScaleX(), affine.getShearX(), affine.getShearY(), affine.getScaleY() };
}
}
// building the actual transform for the resulting grid geometry
AffineTransform tx;
if (gridCRS.getGridType().equals(GridType.GT2dSimpleGrid.getXmlConstant())) {
tx = new AffineTransform(
offsets[0], 0,
0, offsets[1],
origin[0], origin[1]
);
} else if(gridCRS.getGridType().equals(GridType.GT2dGridIn2dCrs.getXmlConstant())) {
tx = new AffineTransform(
offsets[0], offsets[1],
offsets[2], offsets[3],
origin[0], origin[1]
);
} else {
tx = new AffineTransform(
offsets[0], offsets[4],
offsets[1], offsets[3],
origin[0], origin[1]
);
if (origin.length != 3 || offsets.length != 6)
throw new WcsException("", InvalidParameterValue, "GridCRS");
//
// ELEVATIONS
//
// TODO: draft code ... it needs more study!
elevationLevels = (int) Math.round(requestedEnvelope.getUpperCorner().getOrdinate(2) - requestedEnvelope.getLowerCorner().getOrdinate(2));
// compute the elevation levels, we have elevationLevels values
if (elevationLevels > 0) {
elevations=new double[elevationLevels];
elevations[0]=requestedEnvelope.getLowerCorner().getOrdinate(2); // TODO put the extrema
elevations[elevationLevels-1]=requestedEnvelope.getUpperCorner().getOrdinate(2);
if(elevationLevels>2){
final int adjustedLevelsNum=elevationLevels-1;
double step = (elevations[elevationLevels-1]-elevations[0])/adjustedLevelsNum;
for(int i=1;i<adjustedLevelsNum;i++)
elevations[i]=elevations[i-1]+step;
}
}
}
gridToCRS = new AffineTransform2D(tx);
}
//
// TIME Values
//
final List<Date> timeValues = new LinkedList<Date>();
TimeSequenceType temporalSubset = request.getDomainSubset().getTemporalSubset();
if (temporalSubset != null && temporalSubset.getTimePosition() != null
&& temporalSubset.getTimePosition().size() > 0) {
for (Iterator it = temporalSubset.getTimePosition().iterator(); it.hasNext(); ) {
Date tp = (Date) it.next();
timeValues.add(tp);
}
} else if (temporalSubset != null && temporalSubset.getTimePeriod() != null
&& temporalSubset.getTimePeriod().size() > 0) {
for (Iterator it = temporalSubset.getTimePeriod().iterator(); it.hasNext(); ) {
TimePeriodType tp = (TimePeriodType) it.next();
Date beginning = (Date)tp.getBeginPosition();
Date ending = (Date)tp.getEndPosition();
timeValues.add(beginning);
timeValues.add(ending);
}
}
// now we have enough info to read the coverage, grab the parameters
// and add the grid geometry info
final GeneralEnvelope intersectionEnvelopeInSourceCRS = new GeneralEnvelope(requestedEnvelopeInSourceCRS);
intersectionEnvelopeInSourceCRS.intersect(originalEnvelope);
final GeneralEnvelope intersectionEnvelope=
bboxToNativeTx.isIdentity()?
new GeneralEnvelope(intersectionEnvelopeInSourceCRS):
CRS.transform(bboxToNativeTx.inverse(), intersectionEnvelopeInSourceCRS);
intersectionEnvelope.setCoordinateReferenceSystem(targetCRS);
final GridGeometry2D requestedGridGeometry = new GridGeometry2D(PixelInCell.CELL_CORNER, gridToCRS, intersectionEnvelopeInSourceCRS, null);
final ParameterValueGroup readParametersDescriptor = reader.getFormat().getReadParameters();
GeneralParameterValue[] readParameters = CoverageUtils.getParameters(readParametersDescriptor, meta.getParameters());
readParameters = (readParameters != null ? readParameters : new GeneralParameterValue[0]);
//
// Setting coverage reading params.
//
final ParameterValue requestedGridGeometryParam = new DefaultParameterDescriptor(AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString(), GeneralGridGeometry.class, null, requestedGridGeometry).createValue();
/*
* Test if the parameter "TIME" is present in the WMS
* request, and by the way in the reading parameters. If
* it is the case, one can adds it to the request. If an
* exception is thrown, we have nothing to do.
*/
final List<GeneralParameterDescriptor> parameterDescriptors = readParametersDescriptor.getDescriptor().descriptors();
ParameterValue time=null;
boolean hasTime=timeValues.size()>0;
ParameterValue elevation=null;
boolean hasElevation=elevations != null && !Double.isNaN(elevations[0]);
if(hasElevation||hasTime){
for(GeneralParameterDescriptor pd:parameterDescriptors){
final String code=pd.getName().getCode();
//
// TIME
//
if(code.equalsIgnoreCase("TIME")){
time=(ParameterValue) pd.createValue();
time.setValue(timeValues); }
//
// ELEVATION
//
if(code.equalsIgnoreCase("ELEVATION")){
elevation=(ParameterValue) pd.createValue();
elevation.setValue(elevations[0]);
}
// leave?
if((hasElevation&&elevation!=null&&hasTime&&time!=null)||
!hasElevation&&hasTime&&time!=null||
hasElevation&&elevation!=null&&!hasTime)
break;
}
}
//
// add read parameters
//
int addedParams=1+(hasTime?1:0)+(hasElevation?1:0);
// add to the list
GeneralParameterValue[] readParametersClone = new GeneralParameterValue[readParameters.length+addedParams--];
System.arraycopy(readParameters, 0,readParametersClone , 0, readParameters.length);
readParametersClone[readParameters.length+addedParams--]=requestedGridGeometryParam;
if(hasTime)
readParametersClone[readParameters.length+addedParams--]=time;
if(hasElevation)
readParametersClone[readParameters.length+addedParams--]=elevation;
readParameters=readParametersClone;
// Check we're not being requested to read too much data from input (first check,
// guesses the grid size using the information contained in CoverageInfo)
WCSUtils.checkInputLimits(wcs, meta, reader, requestedGridGeometry);
//
// Check if we have a filter among the params
//
Filter filter = WCSUtils.getRequestFilter();
if(filter != null) {
readParameters = CoverageUtils.mergeParameter(parameterDescriptors,
readParameters, filter, "FILTER", "Filter");
}
//
// perform Read ...
//
coverage = (GridCoverage2D) reader.read(readParameters);
if ((coverage == null) || !(coverage instanceof GridCoverage2D)) {
throw new IOException("The requested coverage could not be found.");
}
// now that we have read the coverage double check the input size
WCSUtils.checkInputLimits(wcs, coverage);
/**
* Band Select (works on just one field)
*/
GridCoverage2D bandSelectedCoverage = coverage;
String interpolationType = null;
if (request.getRangeSubset() != null) {
if (request.getRangeSubset().getFieldSubset().size() > 1) {
throw new WcsException("Multi field coverages are not supported yet");
}
FieldSubsetType field = (FieldSubsetType) request.getRangeSubset().getFieldSubset().get(0);
interpolationType = field.getInterpolationType();
// handle axis subset
if (field.getAxisSubset().size() > 1) {
throw new WcsException("Multi axis coverages are not supported yet");
}
if (field.getAxisSubset().size() == 1) {
// prepare a support structure to quickly get the band index
// of a
// key
List<CoverageDimensionInfo> dimensions = meta.getDimensions();
Map<String, Integer> dimensionMap = new HashMap<String, Integer>();
for (int i = 0; i < dimensions.size(); i++) {
String keyName = dimensions.get(i).getName().replace(' ', '_');
dimensionMap.put(keyName, i);
}
// extract the band indexes
AxisSubsetType axisSubset = (AxisSubsetType) field.getAxisSubset().get(0);
List keys = axisSubset.getKey();
int[] bands = new int[keys.size()];
for (int j = 0; j < bands.length; j++) {
final String key = (String) keys.get(j);
Integer index = dimensionMap.get(key);
if (index == null)
throw new WcsException("Unknown field/axis/key combination "
+ field.getIdentifier().getValue() + "/"
+ axisSubset.getIdentifier() + "/" + key);
bands[j] = index;
}
// finally execute the band select
try {
bandSelectedCoverage = (GridCoverage2D) WCSUtils
.bandSelect(coverage, bands);
} catch (WcsException e) {
throw new WcsException(e.getLocalizedMessage());
}
}
}
/**
* Checking for supported Interpolation Methods
*/
Interpolation interpolation = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
if (interpolationType != null) {
if (interpolationType.equalsIgnoreCase("bilinear")) {
interpolation = Interpolation.getInstance(Interpolation.INTERP_BILINEAR);
} else if (interpolationType.equalsIgnoreCase("bicubic")) {
interpolation = Interpolation.getInstance(Interpolation.INTERP_BICUBIC);
} else if (interpolationType.equalsIgnoreCase("nearest")) {
interpolation = Interpolation.getInstance(Interpolation.INTERP_NEAREST);
}
}
/**
* Reproject
*/
// adjust the grid geometry to use the final bbox and crs
final GridGeometry2D destinationGridGeometry = new GridGeometry2D(PixelInCell.CELL_CORNER, gridToCRS, intersectionEnvelope, null);
// before extracting the output make sure it's not too big
WCSUtils.checkOutputLimits(wcs, destinationGridGeometry.getGridRange2D(),
bandSelectedCoverage.getRenderedImage().getSampleModel());
// reproject if necessary
if(!CRS.equalsIgnoreMetadata(nativeCRS, targetCRS) || !bandSelectedCoverage.getGridGeometry().equals(destinationGridGeometry)) {
final GridCoverage2D reprojectedCoverage = WCSUtils.resample(
bandSelectedCoverage,
nativeCRS, targetCRS, destinationGridGeometry,interpolation);
return new GridCoverage[] { reprojectedCoverage };
} else {
return new GridCoverage[] { bandSelectedCoverage };
}
} catch (Throwable e) {
if (e instanceof WcsException)
throw (WcsException) e;
else
throw new WcsException(e);
}
}
private void checkDomainSubset(CoverageInfo meta, DomainSubsetType domainSubset, WCSInfo wcs)
throws Exception {
BoundingBoxType bbox = domainSubset.getBoundingBox();
// domain subset should actually be always specified, but we try to be more lenient
// (we should probably have a "strict cite" behavior
if(bbox == null) {
return;
}
// workaround for http://jira.codehaus.org/browse/GEOT-1710
if("urn:ogc:def:crs:OGC:1.3:CRS84".equals(bbox.getCrs())) {
bbox.setCrs("EPSG:4326");
}
CoordinateReferenceSystem bboxCRs = CRS.decode(bbox.getCrs());
Envelope gridEnvelope = meta.getGridCoverage(null, WCSUtils.getReaderHints(wcs)).getEnvelope();
GeneralEnvelope gridEnvelopeBboxCRS = null;
if (bboxCRs instanceof GeographicCRS) {
try {
CoordinateOperationFactory cof = CRS.getCoordinateOperationFactory(true);
final CoordinateOperation operation = cof.createOperation(gridEnvelope
.getCoordinateReferenceSystem(), bboxCRs);
gridEnvelopeBboxCRS = CRS.transform(operation, gridEnvelope);
} catch (Exception e) {
// this may happen, there is nothing we can do about it, we just
// use the back transformed envelope to be more lenient about
// which coordinate coorections to make on the longitude axis
// should the antimeridian style be used
}
}
// check the coordinates, but make sure the case 175,-175 is handled
// as valid for the longitude axis in a geographic coordinate system
// see section 7.6.2 of the WCS 1.1.1 spec)
List<Double> lower = bbox.getLowerCorner();
List<Double> upper = bbox.getUpperCorner();
for (int i = 0; i < lower.size(); i++) {
if (lower.get(i) > upper.get(i)) {
final CoordinateSystemAxis axis = bboxCRs.getCoordinateSystem().getAxis(i);
// see if the coordinates can be fixed
if (bboxCRs instanceof GeographicCRS && axis.getDirection() == AxisDirection.EAST) {
if (gridEnvelopeBboxCRS != null) {
// try to guess which one needs to be fixed
final double envMax = gridEnvelopeBboxCRS.getMaximum(i);
if (envMax >= lower.get(i))
upper.set(i, upper.get(i) + (axis.getMaximumValue() - axis.getMinimumValue()));
else
lower.set(i, lower.get(i) - (axis.getMaximumValue() - axis.getMinimumValue()));
} else {
// just fix the upper and hope...
upper.set(i, upper.get(i) + (axis.getMaximumValue() - axis.getMinimumValue()));
}
}
// if even after the fix we're in the wrong situation, complain
if (lower.get(i) > upper.get(i)) {
throw new WcsException("illegal bbox, min of dimension " + (i + 1) + ": "
+ lower.get(i) + " is " + "greater than max of same dimension: "
+ upper.get(i), WcsExceptionCode.InvalidParameterValue, "BoundingBox");
}
}
}
}
/**
* Checks that the elements of the Output part of the request do make sense
* by comparing them to the coverage metadata
*
* @param info
* @param rangeSubset
*/
private void checkOutput(CoverageInfo meta, OutputType output) {
if (output == null)
return;
String format = output.getFormat();
String declaredFormat = getDeclaredFormat(meta.getSupportedFormats(), format);
if (declaredFormat == null)
throw new WcsException("format " + format + " is not supported for this coverage",
InvalidParameterValue, "format");
final GridCrsType gridCRS = output.getGridCRS();
if (gridCRS != null) {
// check grid base crs is valid, and eventually default it out
String gridBaseCrs = gridCRS.getGridBaseCRS();
if (gridBaseCrs != null) {
// make sure the requested is among the supported ones, by
// making a
// code level
// comparison (to avoid assuming epsg:xxxx and
// http://www.opengis.net/gml/srs/epsg.xml#xxx are different
// ones.
// We'll also consider the urn one comparable, allowing eventual
// axis flip on the
// geographic crs
String actualCRS = null;
final String gridBaseCrsCode = extractCode(gridBaseCrs);
for (Iterator it = meta.getResponseSRS().iterator(); it.hasNext();) {
final String responseCRS = (String) it.next();
final String code = extractCode(responseCRS);
if (code.equalsIgnoreCase(gridBaseCrsCode)) {
actualCRS = responseCRS;
}
}
if (actualCRS == null)
throw new WcsException("CRS " + gridBaseCrs
+ " is not among the supported ones for coverage " + meta.getName(),
WcsExceptionCode.InvalidParameterValue, "GridBaseCrs");
gridCRS.setGridBaseCRS(gridBaseCrs);
} else {
String code = GML2EncodingUtils.epsgCode(meta.getCRS());
gridCRS.setGridBaseCRS("urn:x-ogc:def:crs:EPSG:" + code);
}
// check grid type makes sense and apply default otherwise
String gridTypeValue = gridCRS.getGridType();
GridType type = GridType.GT2dGridIn2dCrs;
if (gridTypeValue != null) {
type = null;
for (GridType gt : GridType.values()) {
if (gt.getXmlConstant().equalsIgnoreCase(gridTypeValue))
type = gt;
}
if (type == null)
throw new WcsException("Unknown grid type " + gridTypeValue,
InvalidParameterValue, "GridType");
else if (type == GridType.GT2dGridIn3dCrs)
throw new WcsException("Unsupported grid type " + gridTypeValue,
InvalidParameterValue, "GridType");
}
gridCRS.setGridType(type.getXmlConstant());
// check gridcs and apply only value we know about
String gridCS = gridCRS.getGridCS();
if (gridCS != null) {
if (!gridCS.equalsIgnoreCase(GridCS.GCSGrid2dSquare.getXmlConstant()))
throw new WcsException("Unsupported grid cs " + gridCS, InvalidParameterValue,
"GridCS");
}
gridCRS.setGridCS(GridCS.GCSGrid2dSquare.getXmlConstant());
// check the grid origin and set defaults
CoordinateReferenceSystem crs = null;
try {
crs = CRS.decode(gridCRS.getGridBaseCRS());
} catch (Exception e) {
throw new WcsException("Could not understand crs " + gridCRS.getGridBaseCRS(),
WcsExceptionCode.InvalidParameterValue, "GridBaseCRS");
}
if (!gridCRS.isSetGridOrigin() || gridCRS.getGridOrigin() == null) {
// if not set, we have a default of "0 0" as a string, since I
// cannot
// find a way to make it default to new Double[] {0 0} I'll fix
// it here
Double[] origin = new Double[type.getOriginArrayLength()];
Arrays.fill(origin, 0.0);
gridCRS.setGridOrigin(origin);
} else {
Double[] gridOrigin = (Double[]) gridCRS.getGridOrigin();
// make sure the origin dimension matches the output crs
// dimension
if (gridOrigin.length != type.getOriginArrayLength())
throw new WcsException("Grid origin size (" + gridOrigin.length
+ ") inconsistent with grid type " + type.getXmlConstant()
+ " that requires (" + type.getOriginArrayLength() + ")",
WcsExceptionCode.InvalidParameterValue, "GridOrigin");
gridCRS.setGridOrigin(gridOrigin);
}
// perform same checks on the offsets
Double[] gridOffsets = (Double[]) gridCRS.getGridOffsets();
if (gridOffsets != null) {
// make sure the origin dimension matches the grid type
if (type.getOffsetArrayLength() != gridOffsets.length)
throw new WcsException("Invalid offsets lenght, grid type "
+ type.getXmlConstant() + " requires " + type.getOffsetArrayLength(),
InvalidParameterValue, "GridOffsets");
} else {
gridCRS.setGridOffsets(null);
}
}
}
/**
* Extracts only the final part of an EPSG code allowing for a specification
* independent comparison (that is, it removes the EPSG:, urn:xxx:,
* http://... prefixes)
*
* @param srsName
* @return
*/
private String extractCode(String srsName) {
if (srsName.startsWith("http://www.opengis.net/gml/srs/epsg.xml#"))
return srsName.substring(40);
else if (srsName.startsWith("urn:"))
return srsName.substring(srsName.lastIndexOf(':') + 1);
else if (srsName.startsWith("EPSG:"))
return srsName.substring(5);
else
return srsName;
}
/**
* Checks if the supported format string list contains the specified format,
* doing a case insensitive search. If found the declared output format name
* is returned, otherwise null is returned.
*
* @param supportedFormats
* @param format
* @return
*/
private String getDeclaredFormat(List supportedFormats, String format) {
// supported formats may be setup using old style formats, first scan
// the
// configured list
for (Iterator it = supportedFormats.iterator(); it.hasNext();) {
String sf = (String) it.next();
if (sf.equalsIgnoreCase(format)) {
return sf;
} else {
CoverageResponseDelegate delegate = CoverageResponseDelegateFactory.encoderFor(sf);
if (delegate != null && delegate.canProduce(format))
return sf;
}
}
return null;
}
/**
* Checks that the elements of the RangeSubset part of the request do make
* sense by comparing them to the coverage metadata
*
* @param info
* @param rangeSubset
*/
private void checkRangeSubset(CoverageInfo info, RangeSubsetType rangeSubset) {
// quick escape if no range subset has been specified (it's legal)
if (rangeSubset == null)
return;
if (rangeSubset.getFieldSubset().size() > 1) {
throw new WcsException("Multi field coverages are not supported yet",
InvalidParameterValue, "RangeSubset");
}
// check field identifier
FieldSubsetType field = (FieldSubsetType) rangeSubset.getFieldSubset().get(0);
final String fieldId = field.getIdentifier().getValue();
if (!fieldId.equalsIgnoreCase("contents"))
throw new WcsException("Unknown field " + fieldId, InvalidParameterValue, "RangeSubset");
// check interpolation
String interpolation = field.getInterpolationType();
if (interpolation != null) {
boolean interpolationSupported = false;
if (interpolation.equalsIgnoreCase("nearest")) {
interpolation = "nearest neighbor";
}
for (Iterator it = info.getInterpolationMethods().iterator(); it.hasNext();) {
String method = (String) it.next();
if (interpolation.equalsIgnoreCase(method)) {
interpolationSupported = true;
}
}
if (!interpolationSupported)
throw new WcsException(
"The requested Interpolation method is not supported by this Coverage.",
InvalidParameterValue, "RangeSubset");
}
// check axis
if (field.getAxisSubset().size() > 1) {
throw new WcsException("Multi axis coverages are not supported yet",
InvalidParameterValue, "RangeSubset");
} else if (field.getAxisSubset().size() == 0)
return;
AxisSubsetType axisSubset = (AxisSubsetType) field.getAxisSubset().get(0);
final String axisId = axisSubset.getIdentifier();
if (!axisId.equalsIgnoreCase("Bands"))
throw new WcsException("Unknown axis " + axisId + " in field " + fieldId,
InvalidParameterValue, "RangeSubset");
// prepare a support structure to quickly get the band index of a key
// (and remember we replaced spaces with underscores in the keys to
// avoid issues
// with the kvp parsing of indentifiers that include spaces)
List<CoverageDimensionInfo> dimensions = info.getDimensions();
Set<String> dimensionMap = new HashSet<String>();
for (int i = 0; i < dimensions.size(); i++) {
String keyName = dimensions.get(i).getName().replace(' ', '_');
dimensionMap.add(keyName);
}
// check keys
List keys = axisSubset.getKey();
int[] bands = new int[keys.size()];
for (int j = 0; j < bands.length; j++) {
final String key = (String) keys.get(j);
String parsedKey = null;
for (String dimensionName : dimensionMap) {
if (dimensionName.equalsIgnoreCase(key)) {
parsedKey = dimensionName;
break;
}
}
if (parsedKey == null)
throw new WcsException("Unknown field/axis/key combination " + fieldId + "/"
+ axisSubset.getIdentifier() + "/" + key, InvalidParameterValue,
"RangeSubset");
else
keys.set(j, parsedKey);
}
}
/**
*
* @param date
* @return
*/
private static Date cvtToGmt( Date date )
{
TimeZone tz = TimeZone.getDefault();
Date ret = new Date( date.getTime() - tz.getRawOffset() );
// if we are now in DST, back off by the delta. Note that we are checking the GMT date, this is the KEY.
if ( tz.inDaylightTime( ret ))
{
Date dstDate = new Date( ret.getTime() - tz.getDSTSavings() );
// check to make sure we have not crossed back into standard time
// this happens when we are on the cusp of DST (7pm the day before the change for PDT)
if ( tz.inDaylightTime( dstDate ))
{
ret = dstDate;
}
}
return ret;
}
}