/**
* Returns a node for the specified term.
*
* @param term term
* @return node
*/
private ThesNode node(final byte[] term) {
ThesNode node = nodes.get(term);
if (node == null) {
node = new ThesNode();
node.term = term;
nodes.put(term, node);
}
return node;
}
/**
* Returns a regular expression pattern.
*
* @param pattern input pattern
* @param modifier modifier item
* @param ctx query context
* @return pattern modifier
* @throws QueryException query exception
*/
private Pattern pattern(final Expr pattern, final Expr modifier, final QueryContext ctx)
throws QueryException {
final byte[] pat = checkStr(pattern, ctx);
final byte[] mod = modifier != null ? checkStr(modifier, ctx) : null;
final TokenBuilder tb = new TokenBuilder(pat);
if (mod != null) tb.add(0).add(mod);
final byte[] key = tb.finish();
Pattern p = patterns.get(key);
if (p == null) {
p = RegExParser.parse(pat, mod, ctx.sc.xquery3(), info);
patterns.add(key, p);
}
return p;
}
/**
* Finds a thesaurus term.
*
* @param ii input info
* @param list result list
* @param token token
* @throws QueryException query exception
*/
void find(final InputInfo ii, final TokenList list, final byte[] token) throws QueryException {
if (nodes.isEmpty()) init(ii);
find(list, nodes.get(token), 1);
}