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package syntaxParser;
/**
* NumericScalarExpr
* Creation date: (3/3/2003 2:28:43 AM)
* @author: mattia parigiani, Sorin Stancu-Mara
*/
class NumericScalarExpr implements IParseTreeNode {
NumericScalarExpr leftNumericScalarExpr, rightNumericScalarExpr;
String function;
String constValue;
public NumericScalarExpr(String scalar){
constValue = scalar;
function = "scalar";
}
public NumericScalarExpr(String op, NumericScalarExpr expr) throws Exception{
leftNumericScalarExpr = expr;
if (op.equals("+")) function = "scalarUnaryPlus";
else if (op.equals("-")) function = "scalarUnaryMinus";
else if (op.equals("abs")) function = "scalarAbs";
else throw new Exception("Operator " + op + " is not recognized!");
}
public NumericScalarExpr(String op, NumericScalarExpr lbe, NumericScalarExpr rbe) throws Exception {
leftNumericScalarExpr = lbe ;
rightNumericScalarExpr = rbe ;
if (op.equals("+")) function = "scalarPlus";
else if (op.equals("-")) function = "scalarMinus";
else if (op.equals("*")) function = "scalarMult";
else if (op.equals("/")) function = "scalarDiv";
else throw new Exception("Operator " + op + " is not recognized!");
}
public String toXML() {
String result;
result = "<" + function + ">";
if (function.equals("scalar")) {
result += constValue;
} else {
result += leftNumericScalarExpr.toXML();
if (rightNumericScalarExpr != null) {
result += rightNumericScalarExpr.toXML();
}
}
result += "</" + function + ">";
return result;
}
}
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