Examples with TypedConfig io.atomix.utils.config.TypedConfig used on opensource projects

Example 1 with TypedConfig

use of io.atomix.utils.config.TypedConfig in project atomix by atomix.

the class PolymorphicConfigMapper method newInstance.

@Override
@SuppressWarnings("unchecked")
protected <T> T newInstance(Config config, String key, Class<T> clazz) {
    T instance;
    // If the class is a polymorphic type, look up the type mapper and get the concrete type.
    if (isPolymorphicType(clazz)) {
        PolymorphicTypeMapper typeMapper = polymorphicTypes.stream().filter(mapper -> mapper.getConfigClass().isAssignableFrom(clazz)).filter(mapper -> (mapper.getTypePath() != null && config.hasPath(mapper.getTypePath())) || mapper.getTypePath() == null).findFirst().orElse(null);
        if (typeMapper == null) {
            throw new ConfigurationException("Cannot instantiate abstract type " + clazz.getName());
        }
        String typeName = typeMapper.getTypePath() != null ? config.getString(typeMapper.getTypePath()) : key;
        Class<? extends TypedConfig<?>> concreteClass = typeMapper.getConcreteClass(registry, typeName);
        if (concreteClass == null) {
            throw new ConfigurationException("Unknown " + key + " type '" + typeName + "'");
        }
        try {
            instance = (T) concreteClass.newInstance();
        } catch (InstantiationException | IllegalAccessException e) {
            throw new ConfigurationException(concreteClass.getName() + " needs a public no-args constructor to be used as a bean", e);
        }
    } else {
        try {
            instance = clazz.newInstance();
        } catch (InstantiationException | IllegalAccessException e) {
            throw new ConfigurationException(clazz.getName() + " needs a public no-args constructor to be used as a bean", e);
        }
    }
    return instance;
}