/*
 * This file is part of %PACKAGENAME%.
 *
 * %PACKAGENAME% 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.
 *
 * %PACKAGENAME% 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 %PACKAGENAME%. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information please see <http://www.%PACKAGENAME%.org>
 * or contact Peter Baumann via <baumann@rasdaman.com>.
 *
 * Copyright 2009 Jacobs University Bremen, Peter Baumann.
 */

package grammar;

public class BooleanScalarExpr implements IParseTreeNode
{
	BooleanScalarExpr leftBooleanScalarExpr, rightBooleanScalarExpr;
    NumericScalarExpr leftNumericScalar, rightNumericScalar;
    IParseTreeNode left, right;
	String booleanConstant;
	String op;
    String node1, node2;

    public BooleanScalarExpr(String bc) {
        op = null;
		booleanConstant = bc;		
	}	
	
	public BooleanScalarExpr(String op, BooleanScalarExpr be){
		this.op = op;
		left = be ;
	}
	
	public BooleanScalarExpr(String op, BooleanScalarExpr lbe, BooleanScalarExpr rbe){
		this.op = op;
		left = lbe ;
		right = rbe ;
	}

    public BooleanScalarExpr(String op, NumericScalarExpr left, NumericScalarExpr right)
    {
        this.op = op;
        this.left = left;
        this.right = right;
    }

    public BooleanScalarExpr(String op, StringScalarExpr e1, StringScalarExpr e2)
    {
        this.op = op;
        left = e1;
        right = e2;
    }
	
	public String toXML(){
		if (op == null) return "<booleanConstant>" + booleanConstant + "</booleanConstant>";
		else if (op.equals("not")) return "<booleanNot>" + left.toXML() + "</booleanNot>";
		else
        {
            if (this.left != null)
                node1 = this.left.toXML();
            if (this.right != null)
                node2 = this.right.toXML();
            
		    if (op.equals("and")) op = "booleanAnd";
		    else if (op.equals("or")) op = "booleanOr";
		    else if (op.equals("xor")) op = "booleanXor";
            
            else if (op.equals("=")) op = "booleanEqualNumeric";
            else if (op.equals("!=")) op = "booleanNotEqualNumeric";
            else if (op.equals("<")) op = "booleanLessThan";
            else if (op.equals(">")) op = "booleanGreaterThan";
            else if (op.equals("<=")) op = "booleanLessOrEqual";
            else if (op.equals(">=")) op = "booleanGreaterOrEqual";

		    return "<" + op + ">" + node1 + node2 + "</" + op + ">";
		}
		
	}
	
}