private static JdbcFactory load()

in flink-connector-jdbc-core/src/main/java/org/apache/flink/connector/jdbc/core/database/JdbcFactoryLoader.java [90:132]
39 lines of code
4 McCabe index (conditional complexity)

    private static JdbcFactory load(String url, ClassLoader classLoader) {
        List<JdbcFactory> foundFactories = discoverFactories(classLoader);

        if (foundFactories.isEmpty()) {
            throw new IllegalStateException(
                    String.format(
                            "Could not find any jdbc factories that implement '%s' in the classpath.",
                            JdbcFactory.class.getName()));
        }

        final List<JdbcFactory> matchingFactories =
                foundFactories.stream().filter(f -> f.acceptsURL(url)).collect(Collectors.toList());

        if (matchingFactories.isEmpty()) {
            throw new IllegalStateException(
                    String.format(
                            "Could not find any jdbc factory that can handle url '%s' that implements '%s' in the classpath.\n\n"
                                    + "Available factories are:\n\n"
                                    + "%s",
                            url,
                            JdbcFactory.class.getName(),
                            foundFactories.stream()
                                    .map(f -> f.getClass().getName())
                                    .distinct()
                                    .sorted()
                                    .collect(Collectors.joining("\n"))));
        }
        if (matchingFactories.size() > 1) {
            throw new IllegalStateException(
                    String.format(
                            "Multiple jdbc factories can handle url '%s' that implement '%s' found in the classpath.\n\n"
                                    + "Ambiguous factory classes are:\n\n"
                                    + "%s",
                            url,
                            JdbcFactory.class.getName(),
                            matchingFactories.stream()
                                    .map(f -> f.getClass().getName())
                                    .sorted()
                                    .collect(Collectors.joining("\n"))));
        }

        return matchingFactories.get(0);
    }