ReservedIdentifiers.java 文件源码

private static Set<String> possibleIdentifiers()
{
    ImmutableSet.Builder<String> names = ImmutableSet.builder();
    Vocabulary vocabulary = SqlBaseLexer.VOCABULARY;
    for (int i = 0; i <= vocabulary.getMaxTokenType(); i++) {
        String name = nullToEmpty(vocabulary.getLiteralName(i));
        Matcher matcher = IDENTIFIER.matcher(name);
        if (matcher.matches()) {
            names.add(matcher.group(1));
        }
    }
    return names.build();
}