Examples with NameEntry org.joni.NameEntry used on opensource projects

Example 1 with NameEntry

use of org.joni.NameEntry in project elasticsearch by elastic.

the class Grok method captures.

/**
     * Matches and returns any named captures within a compiled grok expression that matched
     * within the provided text.
     *
     * @param text the text to match and extract values from.
     * @return a map containing field names and their respective coerced values that matched.
     */
public Map<String, Object> captures(String text) {
    byte[] textAsBytes = text.getBytes(StandardCharsets.UTF_8);
    Map<String, Object> fields = new HashMap<>();
    Matcher matcher = compiledExpression.matcher(textAsBytes);
    int result = matcher.search(0, textAsBytes.length, Option.DEFAULT);
    if (result != -1 && compiledExpression.numberOfNames() > 0) {
        Region region = matcher.getEagerRegion();
        for (Iterator<NameEntry> entry = compiledExpression.namedBackrefIterator(); entry.hasNext(); ) {
            NameEntry e = entry.next();
            String groupName = new String(e.name, e.nameP, e.nameEnd - e.nameP, StandardCharsets.UTF_8);
            for (int number : e.getBackRefs()) {
                if (region.beg[number] >= 0) {
                    String matchValue = new String(textAsBytes, region.beg[number], region.end[number] - region.beg[number], StandardCharsets.UTF_8);
                    GrokMatchGroup match = new GrokMatchGroup(groupName, matchValue);
                    fields.put(match.getName(), match.getValue());
                    break;
                }
            }
        }
        return fields;
    } else if (result != -1) {
        return fields;
    }
    return null;
}