* or in class "IlcConstraint" (b=false)
* using java reflect */
protected IlcConstraint invokeIlcConstraint(String name,Object[] args,boolean b) {
String className = (b) ? "ilog.rules.validation.solver.IlcIntExpr"
: "ilog.rules.validation.solver.IlcConstraint";
IlcConstraint exp = null;
try {
Class sc = Class.forName("ilog.rules.validation.solver.IlcSolver");
Class intExp = Class.forName(className);
Class[] param = {intExp,intExp};
Method m = sc.getDeclaredMethod(name, param);