us.levk.rserve.client.tools.reflect.Classes Maven / Gradle / Ivy

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/*
 * The MIT License (MIT)
 * Copyright (c) 2017 [email protected]
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
package us.levk.rserve.client.tools.reflect;

import static java.util.stream.Stream.empty;
import static java.util.stream.Stream.of;

import java.util.stream.Stream;

/**
 * Class tools
 * 
 * @author levk
 */
public interface Classes {

  /**
   * @param r
   *          root
   * @return stream of all superclasses and implemented interfaces in descending
   *         order
   */
  static Stream > base (Class  r) {
    return r == null ? empty ()
                     : of (base (r.getSuperclass ()), of (r.getInterfaces ()).flatMap (Classes::base),
                           of (r)).flatMap (x -> x);
  }
}