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/*
* This file is part of PetaScope.
*
* PetaScope is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* PetaScope 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with PetaScope. If not, see <http://www.gnu.org/licenses/>.
*
* For more information please see <http://www.PetaScope.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*
* Copyright 2009 Jacobs University Bremen, Peter Baumann.
*/
package petascope.wcps.server.core;
import petascope.wcps.server.exceptions.InvalidCrsException;
import petascope.wcps.server.exceptions.WCPSException;
import petascope.wcps.server.exceptions.InvalidMetadataException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Vector;
import org.w3c.dom.*;
public class ConstructCoverageExpr implements IRasNode, ICoverageInfo {
private String covName;
private Vector<AxisIterator> iterators;
private IRasNode values;
private CoverageInfo info;
private String axisIteratorString;
private String newIteratorName;
public ConstructCoverageExpr(Node node, XmlQuery xq)
throws WCPSException, InvalidCrsException {
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
iterators = new Vector();
System.err.println("Parsing Construct Coverage Expr: " + node.getNodeName());
newIteratorName = xq.registerNewExpressionWithVariables();
while (node != null) {
String name = node.getNodeName();
if (name.equals("name")) {
covName = node.getTextContent();
} else if (name.equals("axisIterator")) {
AxisIterator it = new AxisIterator(node.getFirstChild(), xq, newIteratorName);
iterators.add(it);
// Top level structures need to know about these iterators
CoverageIterator dyn = new CoverageIterator(it.getVar(), covName);
xq.addDynamicCoverageIterator(dyn);
} else {
/* The iterator is probably used in the "values" section,
* so send the iterator to the top-level query */
if (covName != null && iterators.size() > 0) {
buildMetadata(xq);
} else {
throw new WCPSException("Cannot build coverage metadata !!!");
}
// And only then start parsing the "values" section
values = new ScalarExpr(node, xq);
}
node = node.getNextSibling();
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
}
buildAxisIteratorDomain();
// Sanity check: metadata should have already been build
if (info == null) {
throw new WCPSException("Could not build coverage metadata !!!");
}
}
public String toRasQL() {
String result = "marray ";
result += axisIteratorString;
result += " values " + values.toRasQL();
return result;
}
public CoverageInfo getCoverageInfo() {
return info;
}
/* Concatenates all the AxisIterators into one large multi-dimensional object,
* that will be used to build to RasQL query */
private void buildAxisIteratorDomain() {
axisIteratorString = "";
axisIteratorString += newIteratorName + " in [";
for (int i = 0; i < iterators.size(); i++) {
if (i > 0) {
axisIteratorString += ", ";
}
AxisIterator ai = iterators.elementAt(i);
axisIteratorString += ai.getInterval();
}
axisIteratorString += "]";
}
/** Builds full metadata for the newly constructed coverage **/
private void buildMetadata(XmlQuery xq) throws WCPSException {
List<CellDomainElement> cellDomainList = new LinkedList<CellDomainElement>();
List<RangeElement> rangeList = new LinkedList<RangeElement>();
HashSet<String> nullSet = new HashSet<String>();
String nullDefault = "0";
nullSet.add(nullDefault);
HashSet<InterpolationMethod> interpolationSet = new HashSet<InterpolationMethod>();
InterpolationMethod interpolationDefault = new InterpolationMethod("none", "none");
interpolationSet.add(interpolationDefault);
String coverageName = covName;
List<DomainElement> domainList = new LinkedList<DomainElement>();
Iterator<AxisIterator> i = iterators.iterator();
while (i.hasNext()) {
// Build domain metadata
AxisIterator ai = i.next();
cellDomainList.add(new CellDomainElement(ai.getLow(), ai.getHigh()));
String axisName = ai.getVar();
String axisType = ai.getAxisType();
String crs = DomainElement.WGS84_CRS;
HashSet<String> crsset = new HashSet<String>();
crsset.add(crs);
DomainElement domain = new DomainElement(axisName, axisType,
ai.getLow().doubleValue(), ai.getHigh().doubleValue(),
null, null, crsset, xq.getMetadataSource().getAxisNames());
domainList.add(domain);
}
// "unsigned int" is default datatype
rangeList.add(new RangeElement("dynamic_type", "unsigned int"));
try {
Metadata metadata = new Metadata(cellDomainList, rangeList, nullSet,
nullDefault, interpolationSet, interpolationDefault,
coverageName, domainList, null);
// Let the top-level query know the full metadata about us
xq.getMetadataSource().addDynamicMetadata(covName, metadata);
info = new CoverageInfo(metadata);
} catch (InvalidMetadataException e) {
throw new WCPSException("Could not build coverage '" + covName
+ "' metadata !", e);
}
}
}
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