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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
package petascope.wcps.server.core;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import petascope.wcps.server.exceptions.InvalidCrsException;
import petascope.wcps.server.exceptions.WCPSException;
import org.w3c.dom.*;
import petascope.wcs.server.exceptions.NoApplicableCodeException;
public class DimensionIntervalElement implements IRasNode, ICoverageInfo {
Logger LOG = LoggerFactory.getLogger(DimensionIntervalElement.class);
private IRasNode child;
private CoverageInfo info = null;
private AxisName axis;
private Crs crs;
private ScalarExpr domain1, domain2; // lower and upper bound, or "DomainMetadataExprType" and null
private long coord1, coord2;
private int counter = 0; // counter for the domain vars
private Metadata meta = null; // metadata about the current coverage
private boolean finished = false;
private Node nextNode;
private boolean transformedCoordinates = false;
/**
* Constructs an element of a dimension interval.
* @param node XML Node
* @param xq WCPS Xml Query object
* @param covInfo CoverageInfo object about the Trim parent object
* @throws WCPSException
*/
public DimensionIntervalElement(Node node, XmlQuery xq, CoverageInfo covInfo)
throws WCPSException, InvalidCrsException {
if (covInfo.getCoverageName() != null) {
// Add WGS84 CRS information from coverage metadata, may be useful
// for converting geo-coordinates to pixel-coordinates
String coverageName = covInfo.getCoverageName();
meta = xq.getMetadataSource().read(coverageName);
}
System.err.println("Trying to parse DimensionIntervalElement expression...");
String name;
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
while (node != null && finished == false) {
if (node.getNodeName().equals("#text")) {
node = node.getNextSibling();
continue;
}
name = node.getNodeName();
System.err.println("Current node is " + name);
// Try Axis
try {
axis = new AxisName(node, xq);
node = node.getNextSibling();
continue;
} catch (WCPSException e) {
System.err.println("Failed to parse an axis!");
}
// Try CRS name
try {
crs = new Crs(node, xq);
node = node.getNextSibling();
if (axis == null) {
throw new WCPSException("Expected Axis node before CRS !");
}
continue;
} catch (WCPSException e) {
System.err.println("Failed to parse a crs!");
}
// TODO: how to implement DomainMetadataExpr ?
// // Try last thing
// try
// {
// domain1 = new DomainMetadataExprType(node, xq);
// counter = 1;
// continue;
// }
// catch (WCPSException e)
// {
// System.err.println("Failed to parse domain metadata!");
// }
// Then it must be a pair of nodes "lowerBound" + "upperBound"
if (node.getNodeName().equals("lowerBound")) {
counter = 2;
domain1 = new ScalarExpr(node.getFirstChild(), xq);
if (axis == null) {
throw new WCPSException("Expected <axis> node before <lowerBound> !");
}
} else if (node.getNodeName().equals("upperBound")) {
counter = 2;
domain2 = new ScalarExpr(node.getFirstChild(), xq);
if (axis == null) {
throw new WCPSException("Expected <lowerBound> node before <upperBound> !");
}
} else {
throw new WCPSException("Unexpected node: " + node.getFirstChild().getNodeName());
}
if (axis != null && counter == 1 && domain1 != null) {
finished = true;
}
if (axis != null && counter == 2 && domain1 != null && domain2 != null) {
finished = true;
}
if (finished == true) {
nextNode = node.getNextSibling();
}
node = node.getNextSibling();
}
if (finished == true) {
convertToPixelCoordinates();
}
}
/* If input coordinates are geo-, convert them to pixel coordinates. */
private void convertToPixelCoordinates() {
if (meta.getCrs() == null && crs != null && crs.getName().equals(DomainElement.WGS84_CRS)) {
throw new RuntimeException("Coverage '" + meta.getCoverageName()
+ "' is not georeferenced with 'EPSG:4326' coordinate system.");
}
if (counter == 2 && crs != null && domain1.isSingleValue() && domain2.isSingleValue()) {
if (crs.getName().equals(DomainElement.WGS84_CRS)) {
LOG.debug("CRS is '{}' and should be equal to '{}'", crs.getName(), DomainElement.WGS84_CRS);
try {
this.transformedCoordinates = true;
// Convert to pixel coordinates
Double val1 = domain1.getSingleValue();
Double val2 = domain2.getSingleValue();
String axisName = axis.toRasQL().toUpperCase();
if (axisName.equals("X")) {
long[] pCoord = crs.convertToPixelCoordinates(meta, "X", val1, val2, null, null);
coord1 = pCoord[0];
coord2 = pCoord[1];
}
if (axisName.equals("Y")) {
long[] pCoord = crs.convertToPixelCoordinates(meta, "Y", null, null, val1, val2);
coord1 = pCoord[2];
coord2 = pCoord[3];
}
} catch (NoApplicableCodeException e) {
this.transformedCoordinates = false;
LOG.error("Error while transforming geo-coordinates to pixel coordinates."
+ "The metadata is probably not valid.");
}
}
}
}
/* Not used */
public String toRasQL() {
return "<DimensionIntervalElement Not Converted to RasQL>";
}
public CoverageInfo getCoverageInfo() {
return info;
}
public Node getNextNode() {
return nextNode;
}
public String getAxisName() {
return this.axis.toRasQL();
}
public String getAxisCoords() {
return this.domain1.toRasQL() + " : " + this.domain2.toRasQL();
}
public String getLowCoord() {
if (transformedCoordinates) {
return String.valueOf(coord1);
} else {
return this.domain1.toRasQL();
}
}
public String getHighCoord() {
if (transformedCoordinates) {
return String.valueOf(coord2);
} else {
return this.domain2.toRasQL();
}
}
}
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