/**
* Adds a local function.
*
* @param fun function instance
* @param ii input info
* @return function id
* @throws QueryException query exception
*/
public int add(final UserFunc fun, final InputInfo ii) throws QueryException {
final QNm name = fun.name;
final byte[] uri = name.uri();
if (uri.length == 0) FUNNONS.thrw(ii, name.string());
if (NSGlobal.reserved(uri)) {
if (fun.declared) NAMERES.thrw(ii, name.string());
funError(name, ii);
}
final byte[] ln = name.local();
for (int l = 0; l < funcs.length; ++l) {
final QNm qn = funcs[l].name;
final byte[] u = qn.uri();
final byte[] nm = qn.local();
if (eq(ln, nm) && eq(uri, u) && fun.args.length == funcs[l].args.length) {
// declare function that has been called before
if (!funcs[l].declared) {
funcs[l] = fun;
return l;
}
// duplicate declaration
FUNCDEFINED.thrw(ii, fun.name.string());
}
}
// add function skeleton
funcs = Array.add(funcs, fun);
calls = Array.add(calls, new UserFuncCall[0]);
return funcs.length - 1;
}
/**
* Finds similar function names and throws an error message.
*
* @param name function name
* @param ii input info
* @throws QueryException query exception
*/
public void funError(final QNm name, final InputInfo ii) throws QueryException {
// find global function
Functions.get().error(name, ii);
// find similar local function
final Levenshtein ls = new Levenshtein();
final byte[] nm = lc(name.local());
for (final UserFunc f : funcs) {
if (ls.similar(nm, lc(f.name.local()), 0)) {
FUNSIMILAR.thrw(ii, name.string(), f.name.string());
}
}
}
/**
* Checks if the specified item is a string or element.
*
* @param it item to be checked
* @return item
* @throws QueryException query exception
*/
private Item checkElmStr(final Item it) throws QueryException {
if (it instanceof AStr || TEST.eq(it)) return it;
throw ELMSTRTYPE.thrw(info, Q_ENTRY.string(), it.type);
}