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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.*;
public class UnaryOperationCoverageExpr implements IRasNode, ICoverageInfo {
private CoverageExpr child;
private CoverageInfo info;
private String operation;
private String params;
public UnaryOperationCoverageExpr(Node node, XmlQuery xq)
throws WCPSException, InvalidCrsException {
String nodeName = node.getNodeName();
System.err.println("Trying to parse unary operation: " + nodeName);
if (nodeName.equals("unaryPlus")) {
operation = "+";
child = new CoverageExpr(node.getFirstChild(), xq);
} else if (nodeName.equals("unaryMinus")) {
operation = "-";
child = new CoverageExpr(node.getFirstChild(), xq);
} else if (nodeName.equals("sqrt") || nodeName.equals("abs")
|| nodeName.equals("exp") || nodeName.equals("log") || nodeName.equals("ln")
|| nodeName.equals("sin") || nodeName.equals("cos") || nodeName.equals("tan")
|| nodeName.equals("sinh") || nodeName.equals("cosh")
|| nodeName.equals("tanh") || nodeName.equals("arcsin")
|| nodeName.equals("arccos") || nodeName.equals("arctan")
|| nodeName.equals("not") || nodeName.equals("re") || nodeName.equals("im")) {
operation = nodeName;
child = new CoverageExpr(node.getFirstChild(), xq);
} else if (nodeName.equals("bit")) {
operation = "bit";
Node c = node.getFirstChild();
while (c != null) {
if (c.getNodeName().equals("#text")) {
c = c.getNextSibling();
continue;
}
if (c.getNodeName().equals("bitIndex")) {
try {
params = c.getFirstChild().getNodeValue();
int i = Integer.parseInt(params);
System.err.println("Found bitIndex = " + params);
} catch (NumberFormatException e) {
throw new WCPSException("Invalid Number as bitIndex: " + params);
}
} else {
child = new CoverageExpr(c, xq);
}
c = c.getNextSibling();
}
} else if (nodeName.equals("cast")) {
operation = "cast";
Node c = node.getFirstChild();
while (c != null) {
if (c.getNodeName().equals("#text")) {
c = c.getNextSibling();
continue;
}
if (c.getNodeName().equals("type")) {
RangeField typeNode = new RangeField(c, xq);
params = typeNode.toRasQL();
} else {
child = new CoverageExpr(c, xq);
}
c = c.getNextSibling();
}
} else if (nodeName.equals("fieldSelect")) {
operation = "select";
Node c = node.getFirstChild();
while (c != null) {
if (c.getNodeName().equals("#text")) {
c = c.getNextSibling();
continue;
}
if (c.getNodeName().equals("field")) {
FieldName nameNode = new FieldName(c.getFirstChild(), xq);
params = nameNode.toRasQL();
} else {
child = new CoverageExpr(c, xq);
}
c = c.getNextSibling();
}
} else {
throw new WCPSException("Unknown unary operation: " + nodeName);
}
info = new CoverageInfo(child.getCoverageInfo());
}
public CoverageInfo getCoverageInfo() {
return info;
}
public String toRasQL() {
if (operation.equals("sqrt") || operation.equals("abs") || operation.equals("exp")
|| operation.equals("log") || operation.equals("ln") || operation.equals("sin")
|| operation.equals("cos") || operation.equals("tan")
|| operation.equals("sinh") || operation.equals("cosh")
|| operation.equals("tanh") || operation.equals("arcsin")
|| operation.equals("arccos") || operation.equals("arctan")
|| operation.equals("not") || operation.equals("+") || operation.equals("-")) {
return operation + "(" + child.toRasQL() + ")";
} else if (operation.equals("cast")) {
// Use rasql's direct "type-casting" facility for constant scalar expressions
// For example, (char)1 does not work, but 1c is a valid expression.
if (child.isScalarExpr() && params.equals("char"))
return child.toRasQL() + "c";
else
return "(" + params + ")(" + child.toRasQL() + ")";
} else if (operation.equals("select")) {
return "(" + child.toRasQL() + ")." + params;
} else if (operation.equals("bit")) {
return "bit(" + child.toRasQL() + "," + params + ")";
}
return " error ";
}
}
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