//
// The operand needs to use the number function
// to covert to numbers
internal NumericExpr(Operator.Op op, IQuery opnd1, IQuery opnd2) {
if (opnd1.ReturnType() != XPathResultType.Number) {
this.opnd1= new NumberFunctions(opnd1);
}
else {
this.opnd1 = opnd1;
}
if (opnd2 != null && (opnd2.ReturnType() != XPathResultType.Number)) {
this.opnd2= new NumberFunctions(opnd2);
}
else{
this.opnd2 = opnd2;
}
this.op= op;
}
internal LogicalExpr(Operator.Op op, IQuery opnd1, IQuery opnd2){
this.opnd1= opnd1;
this.opnd2= opnd2;
this.op= op;
}
//
// Operator: Or, and, |
// +, -, *, div,
// >, >=, <, <=, =, !=
//
private IQuery ProcessOperator(Operator root, IQuery qyInput) {
IQuery ret = null;
switch (root.OperatorType) {
case Operator.Op.OR:
ret = new OrExpr(ProcessNode(root.Operand1, null),
ProcessNode(root.Operand2, null));
return ret;
case Operator.Op.AND :
ret = new AndExpr(ProcessNode(root.Operand1, null),
ProcessNode(root.Operand2, null));
return ret;
}
switch (root.ReturnType) {
case XPathResultType.Number:
ret = new NumericExpr(root.OperatorType,
ProcessNode(root.Operand1, null),
ProcessNode(root.Operand2, null));
return ret;
case XPathResultType.Boolean:
ret = new LogicalExpr(root.OperatorType,
ProcessNode(root.Operand1, null),
ProcessNode(root.Operand2, null));
return ret;
}
return ret;
}