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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 - 2010 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 petascope.core.Metadata;
import petascope.exceptions.PetascopeException;
import petascope.exceptions.WCPSException;
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 ConstantCoverageExpr implements IRasNode, ICoverageInfo {
private String covName;
private Vector<AxisIterator> iterators;
private ConstantList valueList;
private CoverageInfo info;
private String axisIteratorString;
private int requiredListSize = 1;
public ConstantCoverageExpr(Node node, XmlQuery xq)
throws WCPSException {
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
iterators = new Vector();
System.err.println("Parsing Constant Coverage Expr: " + node.getNodeName());
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, "temp");
iterators.add(it);
} else {
valueList = new ConstantList(node, xq);
node = valueList.getLastNode();
}
node = node.getNextSibling();
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
}
try {
buildMetadata(xq);
} catch (PetascopeException ex) {
throw new WCPSException("Cannot build coverage metadata !!!");
}
buildAxisIteratorDomain();
// Sanity check: dimensions should match number of constants in the list
if (valueList.getSize() != requiredListSize) {
throw new WCPSException("The number of constants in the list do "
+ "not match the dimensions specified !");
}
// Sanity check: metadata should have already been build
if (info == null) {
throw new WCPSException("Could not build constant coverage metadata !!!");
}
}
public String toRasQL() {
String result = "< ";
result += axisIteratorString + " ";
result += valueList.toRasQL();
result += ">";
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. Also counts how many elements
* fit in the specified dimensions. */
private void buildAxisIteratorDomain() {
requiredListSize = 1;
axisIteratorString = "";
axisIteratorString += "[";
for (int i = 0; i < iterators.size(); i++) {
if (i > 0) {
axisIteratorString += ", ";
}
AxisIterator ai = iterators.elementAt(i);
axisIteratorString += ai.getInterval();
requiredListSize *= (ai.getHigh().intValue() - ai.getLow().intValue() + 1);
}
axisIteratorString += "]";
System.err.println("Axes for ConstantCoverage tell us that the constant"
+ "list should have exactly " + requiredListSize + " elements !");
}
/** Builds full metadata for the newly constructed coverage **/
private void buildMetadata(XmlQuery xq) throws WCPSException, PetascopeException {
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(), null); // FIXME uom = null
domainList.add(domain);
}
// TODO: check element datatypes and their consistency
// "unsigned int" is default datatype
rangeList.add(new RangeElement("dynamic_type", "unsigned int", null));
Metadata metadata = new Metadata(cellDomainList, rangeList, nullSet,
nullDefault, interpolationSet, interpolationDefault,
coverageName, "GridCoverage", domainList, null); // FIXME
// Let the top-level query know the full metadata about us
xq.getMetadataSource().addDynamicMetadata(covName, metadata);
info = new CoverageInfo(metadata);
}
}
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