@Override
public NodeValue exec(NodeValue v) {
Node n = v.asNode();
if (!n.isBlank()) throw new ExprEvalException("bnode: not a blank node");
NodeValue nv = NodeValue.makeString(n.getBlankNodeId().getLabelString());
return nv;
}
public static void evalPrint(Expr expr, Binding binding) {
try {
NodeValue r = eval(expr, binding);
// System.out.println(r.asQuotedString()) ;
Node n = r.asNode();
String s = FmtUtils.stringForNode(n);
System.out.println(s);
} catch (ExprEvalException ex) {
System.out.println("Exception: " + ex.getMessage());
return;
} catch (ExprBuildException ex) {
System.err.println("Build exception: " + ex.getMessage());
return;
}
}
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();
}
@Override
public NodeValue exec(NodeValue v) {
return NodeValue.makeDouble(1d / v.getDouble());
}
@Override
protected NodeValue evalSpecial(Binding binding, FunctionEnv env) {
return NodeValue.booleanReturn(checkAccess(binding));
}
@Override
public NodeValue exec(NodeValue v) {
return NodeValue.makeDouble(Math.atan(v.getDouble()));
}
public static Expr nodeToExpr(Node n) {
if (n.isVariable()) return new ExprVar(n);
return NodeValue.makeNode(n);
}
public static NodeValue parseNodeValue(String s) {
Node n = NodeFactoryExtra.parseNode(s);
NodeValue nv = NodeValue.makeNode(n);
return nv;
}