private static Expression ComposeSetLogicalGraph(string logicalFunction, string comparisonFunction, Expression lhsExp, FunctionExpression rhsExp)
{
int listCount = rhsExp.Parameters.Count;
Expression logTree = null;
for (int i = 0; i < listCount; ++i) {
Expression val = (Expression) rhsExp.Parameters[i];
Expression itemFun = new FunctionExpression(comparisonFunction, new Expression[] { (Expression) lhsExp.Clone(), val });
logTree = logTree == null ? itemFun : new FunctionExpression(logicalFunction, new Expression[] {logTree, itemFun});
}
return logTree;
}
public void SetJoinGraph(Expression graph)
{
joinGraph = (Expression) graph.Clone();
}