Examples with SystemConfigurationException org.kanonizo.exception.SystemConfigurationException used on opensource projects

Example 1 with SystemConfigurationException

use of org.kanonizo.exception.SystemConfigurationException in project kanonizo by kanonizo.

the class Main method getAlgorithm.

private static SearchAlgorithm getAlgorithm(String algorithmChoice) throws InstantiationException, IllegalAccessException {
    Reflections r = Util.getReflections();
    Set<Class<?>> algorithms = r.getTypesAnnotatedWith(Algorithm.class);
    Optional<?> algorithmClass = algorithms.stream().map(cl -> {
        try {
            return cl.newInstance();
        } catch (IllegalAccessException | InstantiationException e) {
            logger.error(e);
        }
        return null;
    }).filter(obj -> ((SearchAlgorithm) obj).readableName().equals(algorithmChoice)).findFirst();
    if (algorithmClass.isPresent()) {
        SearchAlgorithm algorithm = (SearchAlgorithm) algorithmClass.get();
        List<Method> requirements = Framework.getPrerequisites(algorithm);
        boolean anyFail = false;
        for (Method requirement : requirements) {
            try {
                boolean passed = (boolean) requirement.invoke(null, null);
                if (!passed) {
                    anyFail = true;
                    String error = requirement.getAnnotation(Prerequisite.class).failureMessage();
                    logger.error("System is improperly configured: " + error);
                }
            } catch (InvocationTargetException e) {
                logger.error(e);
            }
        }
        if (anyFail) {
            throw new SystemConfigurationException("");
        }
        return algorithm;
    }
    List<String> algorithmNames = Framework.getAvailableAlgorithms().stream().map(alg -> alg.readableName()).collect(Collectors.toList());
    throw new RuntimeException("Algorithm could not be created. The list of available algorithms is given as: " + algorithmNames.stream().reduce((s, s2) -> s + "\n" + s2));
}