public static NodeValue eval(Expr expr, Binding binding) {
Context context = ARQ.getContext().copy();
context.set(ARQConstants.sysCurrentTime, NodeFactoryExtra.nowAsDateTime());
FunctionEnv env = new ExecutionContext(context, null, null, null);
NodeValue r = expr.eval(binding, env);
return r;
}
public static String joinList(List<Expr> args, String sep) {
if (args == null) return "<<Null list>>";
if (args.size() == 0) return "<<Empty list>>";
StringBuilder s = new StringBuilder();
boolean first = true;
for (Expr ex : args) {
if (!first) s.append(sep);
// Values are printed withquoting.
if (ex instanceof NodeValue) {
NodeValue nv = (NodeValue) ex;
s.append(nv.asQuotedString());
} else s.append(ex.toString());
first = false;
}
return s.toString();
}