从与clazz兼容的组中找到最专业的班级。

/*

 * Copyright (c) 2012 Data Harmonisation Panel

 * 

 * All rights reserved. This program and the accompanying materials are made

 * available under the terms of the GNU Lesser General Public License as

 * published by the Free Software Foundation, either version 3 of the License,

 * or (at your option) any later version.

 * 

 * You should have received a copy of the GNU Lesser General Public License

 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.

 * 

 * Contributors:

 *     HUMBOLDT EU Integrated Project #030962

 *     Data Harmonisation Panel <http://www.dhpanel.eu>

 */

//package com.nowjava;

/**
来 自 nowjava.com
**/

import java.util.Collection;


public class Main {

    /**

     * <p>

     * Find the most specialized class from group compatible with clazz. A

     * direct superclass match is searched and returned if found.

     * </p>

     * <p>

     * If not and checkAssignability is true, the most derived assignable class

     * is being searched.

     * </p>

     * <p>

     * See The Java Language Specification, sections 5.1.1 and 5.1.4 , for

     * details.

     * </p>

     * 

     * @param clazz a class

     * @param group a collection of classes to match against

     * @param checkAssignability whether to use assignability when no direct

     *            match is found

     * @return null or the most specialized match from group

     */

    public static Class<?> findMostSpecificMatch(Class<?> clazz,

            Collection<Class<?>> group, boolean checkAssignability) {

        if (clazz == null || group == null)

            throw new IllegalArgumentException(""); //$NON-NLS-1$


        // scale up the type hierarchy until we have found a matching class

        for (Class<?> c = clazz; c != Object.class; c = c.getSuperclass()) {

            if (group.contains(c))

                return c;

        }


        if (checkAssignability) {

            // in lieu of a direct match, check assignability (likely clazz is

            // an interface)

            Class<?> result = null;//来自 nowjava - 时  代  Java

            for (Class<?> c :