Key.java 文件源码

/**
 * Create key for single method/constructor parameter.
 *
 * @param parameter
 *          Parameter to build key for.
 * @return Created key.
 */
public static Key of(Parameter parameter) {
    Annotation[] annotations = parameter.getAnnotations();

    if (!parameter.getType().isAssignableFrom(Supplier.class)) {
        return new Key(parameter.getParameterizedType(), false,
                       parameter.getType(), findBindingAnnotation(annotations));
    }

    Type type = parameter.getParameterizedType();

    if (type instanceof ParameterizedType) {
        Type[] args = ((ParameterizedType) type).getActualTypeArguments();

        if (args.length > 0 && args[0] instanceof Class) {
            return Key.of(args[0], true, annotations);
        }
    }

    throw new InjectorException("Unable to determine parameter type for " + parameter);
}