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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 BooleanScalarExpr implements IRasNode {
private IRasNode first, second;
private String op;
private boolean simple; // true if the expression is just a value
private String value;
public BooleanScalarExpr(Node node, XmlQuery xq) throws WCPSException, InvalidCrsException {
if (node == null) {
throw new WCPSException("Unexpected null node !");
}
String nodeName = node.getNodeName();
simple = false;
System.err.println("Parsing boolean scalar operation ...");
if (nodeName.equals("booleanConstant")) {
simple = true;
value = node.getFirstChild().getNodeValue();
} else if (nodeName.equals("booleanAnd")
|| nodeName.equals("booleanOr")
|| nodeName.equals("booleanXor")
|| nodeName.equals("booleanLessThan")
|| nodeName.equals("booleanLessOrEqual")
|| nodeName.equals("booleanGreaterThan")
|| nodeName.equals("booleanGreaterOrEqual")
|| nodeName.equals("booleanEqualNumeric")
|| nodeName.equals("booleanNotEqualNumeric")
|| nodeName.equals("booleanEqualString")
|| nodeName.equals("booleanNotEqualString")) {
// Logical operations
if (nodeName.equals("booleanAnd")
|| nodeName.equals("booleanOr")
|| nodeName.equals("booleanXor")) {
// Remove the "boolean" in front
op = nodeName.substring(7).toLowerCase();
Node child = node.getFirstChild();
first = new BooleanScalarExpr(child, xq);
child = child.getNextSibling();
second = new BooleanScalarExpr(child, xq);
} else // Boolean Comparison operations between numbers or strings
{
if (nodeName.equals("booleanLessThan") || nodeName.equals("booleanLessOrEqual")
|| nodeName.equals("booleanGreaterThan") || nodeName.equals("booleanGreaterOrEqual")
|| nodeName.equals("booleanEqualNumeric") || nodeName.equals("booleanNotEqualNumeric")) {
if (nodeName.equals("booleanLessThan")) {
op = "<";
}
if (nodeName.equals("booleanLessOrEqual")) {
op = "<=";
}
if (nodeName.equals("booleanGreaterThan")) {
op = ">";
}
if (nodeName.equals("booleanGreaterOrEqual")) {
op = ">=";
}
if (nodeName.equals("booleanEqualNumeric")) {
op = "=";
}
if (nodeName.equals("booleanNotEqualNumeric")) {
op = "!=";
}
Node child = node.getFirstChild();
first = new NumericScalarExpr(child, xq);
child = child.getNextSibling();
second = new NumericScalarExpr(child, xq);
} else {
if (nodeName.equals("booleanEqualString")) {
op = "=";
}
if (nodeName.equals("booleanNotEqualString")) {
op = "!=";
}
Node child = node.getFirstChild();
first = new StringScalarExpr(child, xq);
child = child.getNextSibling();
second = new StringScalarExpr(child, xq);
}
}
} else if (nodeName.equals("booleanNot")) {
op = "not";
first = new BooleanScalarExpr(node.getFirstChild(), xq);
} else {
throw new WCPSException("Unexpected Binary Expression node : "
+ node.getNodeName());
}
System.err.println("*** Boolean Scalar Expr SUCCESS: " + node.getNodeName());
}
public String toRasQL() {
if (simple) {
return value;
}
if (op.equals("not")) {
return "not(" + first.toRasQL() + ")";
}
return "(" + first.toRasQL() + ")" + op + "(" + second.toRasQL() + ")";
}
}
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