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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 petascope.wcps.server.exceptions.InvalidCrsException;
import petascope.wcps.server.exceptions.WCPSException;
import org.w3c.dom.*;
import java.util.Iterator;
public class CoverageExpr implements IRasNode, ICoverageInfo {
private IRasNode child;
private String childInfo;
private CoverageInfo info;
private boolean scalarExpr = false;
// private String var;
private boolean simpleCoverage; // True is the coverage is just a string
public CoverageExpr(Node node, XmlQuery xq) throws WCPSException, InvalidCrsException {
while ((node != null) && node.getNodeName().equals("#text")) {
node = node.getNextSibling();
}
if (node == null) {
throw new WCPSException("CoverageExprType parsing error!");
}
String nodeName = node.getNodeName();
simpleCoverage = false;
System.err.println("CoverageExprType: node " + nodeName);
if (nodeName.equals("coverage")) {
simpleCoverage = true;
childInfo = node.getFirstChild().getNodeValue();
if (!xq.isIteratorDefined(childInfo)) {
throw new WCPSException("Iterator " + childInfo + " not defined!");
}
Iterator<String> coverages = xq.getCoverages(childInfo);
info = new CoverageInfo(xq.getMetadataSource().read(coverages.next()));
while (coverages.hasNext()) { // Check if all the coverages are compatible
CoverageInfo tmp = new CoverageInfo(
xq.getMetadataSource().read(
coverages.next()));
if (!tmp.isCompatible(info)) {
throw new WCPSException(
"Incompatible coverages within the same iterator");
}
}
System.err.println("Found simple coverage definition: " + childInfo + ", "
+ info.toString());
} else if (nodeName.equals("crsTransform")) {
// TODO: implement CrsTransform class
child = new CrsTransformCoverageExpr(node, xq);
} else if (nodeName.equals("scale")) {
// TODO: implement class ScaleCoverageExprType
child = new ScaleCoverageExpr(node, xq);
} else if (nodeName.equals("construct")) {
child = new ConstructCoverageExpr(node.getFirstChild(), xq);
} else if (nodeName.equals("const")) {
child = new ConstantCoverageExpr(node.getFirstChild(), xq);
} // else if (nodeName.equals("variableRef"))
// {
// child = new VariableReference(node, xq);
// }
else { // Try one of the groups
child = null;
if (child == null) {
try {
child = new SetMetadataCoverageExpr(node, xq);
System.err.println("Matched set metadata operation.");
} catch (WCPSException e) {
System.err.println("Failed to match set metadata operation: "
+ e.toString() + "\nRetrying");
child = null;
}
}
if (child == null) {
try {
child = new InducedOperationCoverageExpr(node, xq);
System.err.println("Matched induced coverage expression operation.");
} catch (WCPSException e) {
System.err.println("Failed to match induced coverage expression operation: "
+ e.toString() + "\nRetrying");
child = null;
if (e.getMessage().equals("Method not implemented")) {
throw e;
}
}
}
if (child == null) {
try {
child = new SubsetOperationCoverageExpr(node, xq);
System.err.println("Matched subset operation.");
} catch (WCPSException e) {
System.err.println("Failed to match subset operation: "
+ "\nRetrying");
child = null;
}
}
if (child == null) {
try {
child = new ScalarExpr(node, xq);
this.scalarExpr = true;
System.err.println("Matched scalar expression.");
} catch (WCPSException e) {
System.err.println("Failed to match scalar expression: "
+ "\nRetrying");
child = null;
}
}
}
if (!simpleCoverage && (child == null)) {
throw new WCPSException("Invalid coverage Expression, next node: "
+ node.getNodeName());
}
if (info == null) {
System.err.println(node.getNodeName());
info = new CoverageInfo(((ICoverageInfo) child).getCoverageInfo());
}
}
public CoverageInfo getCoverageInfo() {
return info;
}
public boolean isScalarExpr()
{
return scalarExpr;
}
public ScalarExpr getScalarExpr()
{
ScalarExpr r = null;
if (scalarExpr)
r = (ScalarExpr) child;
return r;
}
public String toRasQL() {
if (simpleCoverage) {
return childInfo;
} else {
return child.toRasQL();
}
}
};
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