public TargetClassifier build(Path basePath, ObjectMapper yaml, JsonNode parameters) throws JsonProcessingException {
            TitleRegexClassifierConfig params = yaml.treeToValue(parameters, TitleRegexClassifierConfig.class);
            if (params.regular_expression != null && !params.regular_expression.trim().isEmpty()) {
                return new TitleRegexTargetClassifier(params.regular_expression.trim());
            } else {
                return null;
            }
        }
Classify whether a page is relevant to a topic by matching a RegExp against the title.
ache/src/main/java/achecrawler/target/classifier/TitleRegexTargetClassifier.java