Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * Determine the common ancestor of the given classes, if any.
     *
     * @param clazz1 the class to introspect
     * @param clazz2 the other class to introspect
     * @return the common ancestor (i.e. common superclass, one interface
     * extending the other), or {@code null} if none found. If any of the
     * given classes is {@code null}, the other class will be returned.
     * @since 3.2.6
     */
    public static Class<?> determineCommonAncestor(Class<?> clazz1, Class<?> clazz2) {
        if (clazz1 == null) {
            return clazz2;
        }
        if (clazz2 == null) {
            return clazz1;
        }
        if (clazz1.isAssignableFrom(clazz2)) {
            return clazz1;
        }
        if (clazz2.isAssignableFrom(clazz1)) {
            return clazz2;
        }
        Class<?> ancestor = clazz1;
        do {
            ancestor = ancestor.getSuperclass();
            if (ancestor == null || Object.class.equals(ancestor)) {
                return null;
            }
        } while (!ancestor.isAssignableFrom(clazz2));
        return ancestor;
    }
}