比较两个元素的修饰符

/** NowJava.com - 时代Java 提供 **/


//package com.nowjava;

import java.util.Set;

import javax.lang.model.element.Element;

import javax.lang.model.element.Modifier;


public class Main {

    /**

     * Compare the modifier of two elements

     *

     * @return -1 if element a has better visibility, 0 if both have the same visibility, +1 if b has

     * the better visibility. The "best" visibility is PUBLIC

     */

    public static int compareModifierVisibility(Element a, Element b) {


        // a better

        if (a.getModifiers().contains(Modifier.PUBLIC)

                && !b.getModifiers().contains(Modifier.PUBLIC)) {

            return -1;

        }


        if (isDefaultModifier(a.getModifiers())

                && !isDefaultModifier(b.getModifiers())) {
                /** from 
                时 代 J a v a - nowjava.com**/

            return -1;

        }


        if (a.getModifiers().contains(Modifier.PROTECTED)

                && !b.getModifiers().contains(Modifier.PROTECTED)) {

            return -1;

        }


        // b better

        if (b.getModifiers().contains(Modifier.PUBLIC)

                && !a.getModifiers().contains(Modifier.PUBLIC)) {

            return 1;

        }


        if (isDefaultModifier(b.getModifiers())

                && !isDefaultModifier(a.getModifiers())) {

            return 1;

        }


        if (b.getModifiers().contains(Modifier.PROTECTED)

                && !a.getModifiers().contains(Modifier.PROTECTED)) {

            return 1;

        }


        // Same

        return 0;

    }