protected String lookupName(RList f) {
if (f.getNames() != null) {
RAbstractStringVector names = f.getNames();
for (int i = 0; i < names.getLength(); i++) {
if (names.getDataAt(i).equals("name")) {
String name = RRuntime.asString(f.getDataAt(i));
return name != null ? name : UNKNOWN_EXTERNAL_BUILTIN;
}
}
}
return UNKNOWN_EXTERNAL_BUILTIN;
}
public String getDataAt(int index) {
if (levels == null || levels.getLength() == 0) {
return RRuntime.STRING_NA;
} else {
int val = ((RIntVector) vector).getDataAt(index);
if (!vector.isComplete() && RRuntime.isNA(val)) {
return RRuntime.STRING_NA;
} else {
String l = levels.getDataAt(val - 1);
if (!levels.isComplete() && RRuntime.isNA(l)) {
return "NA"; // for comparison
} else {
return l;
}
}
}
}