/**
* Parses and returns the specified keyword.
*
* @param key token to be parsed
* @param cmd referring command; if specified, the keyword is mandatory
* @return result of check
* @throws QueryException query exception
*/
private boolean key(final String key, final Cmd cmd) throws QueryException {
consumeWS();
final int p = parser.pos;
final boolean ok =
(parser.consume(key) || parser.consume(key.toLowerCase(Locale.ENGLISH)))
&& (parser.curr(0) || ws(parser.curr()));
if (!ok) {
parser.pos = p;
if (cmd != null) throw help(null, cmd);
}
return ok;
}
/**
* Parses and returns an xquery expression.
*
* @param cmd referring command; if specified, the result must not be empty
* @return path
* @throws QueryException query exception
*/
private String xquery(final Cmd cmd) throws QueryException {
consumeWS();
final StringBuilder sb = new StringBuilder();
if (!eoc()) {
final QueryContext qc = new QueryContext(ctx);
try {
final QueryParser p = new QueryParser(parser.input, null, qc, null);
p.pos = parser.pos;
p.parseMain();
sb.append(parser.input.substring(parser.pos, p.pos));
parser.pos = p.pos;
} finally {
qc.close();
}
}
return finish(sb, cmd);
}