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Another enhancement library of SpringBoot/SpringFramework. Have fun.

There is a newer version: 3.3.3

package spring.turbo.util;

import org.springframework.util.Assert;

/**
 * @author 应卓
 * @since 1.0.8
 */
public final class InheritanceUtils {

    /**
     * 私有构造方法
     */
    private InheritanceUtils() {
    }

    public static int distance(Class child, Class parent) {
        Assert.notNull(child, "child is required");
        Assert.notNull(parent, "parent is required");

        if (child.equals(parent)) {
            return 0;
        }

        final Class cParent = child.getSuperclass();
        int d = parent.equals(cParent) ? 1 : 0;

        if (d == 1) {
            return d;
        }
        d += distance(cParent, parent);
        return d > 0 ? d + 1 : -1;
    }

}