package designpattern.adapter;

import java.util.HashSet;
import java.util.Set;

public class ForeignIdentify {
    String socailSecurityNumber;

    // 模拟一个社保号的数据库
    static Set<String> dbSet = new HashSet<>();
    static {
        dbSet.add("F001");
        dbSet.add("F002");
        dbSet.add("F003");
    }

    public boolean check(String socailSecurityNumber) {
        if (dbSet.contains(socailSecurityNumber)) {
            System.out.println(socailSecurityNumber + "是外国的合法公民");
            return true;
        } else {
            System.out.println(socailSecurityNumber + "不是外国的合法公民");
            return false;
        }

    }
}

package designpattern.adapter;

import java.util.HashSet;
import java.util.Set;

public class ChineseIdentify {
    String idCardNumber;

    // 模拟一个身份证号的数据库
    static Set<String> dbSet = new HashSet<>();
    static {
        dbSet.add("张三C001");
        dbSet.add("李四C002");
        dbSet.add("王五C003");
    }

    public boolean check(String idCardNumber, String name) {
        if (dbSet.contains(name + idCardNumber)) {
            System.out.println(name + idCardNumber + "是中国的合法公民");
            return true;
        } else {
            System.out.println(name + idCardNumber + "不是中国的合法公民");
            return false;
        }

    }
}

package designpattern.adapter;

import java.util.HashMap;
import java.util.Map;

public class ChinesePassport extends ForeignIdentify {
    ChineseIdentify chineseIdentify = new ChineseIdentify();
    
    // 模拟身份证、名字对应数据库
    static Map<String, String> db = new HashMap<>();
    static {
        db.put("C001", "张三");
        db.put("C002", "李四");
        db.put("C003", "王五");

    }

    @Override
    public boolean check(String idCardNumber) {
        // 为了模拟两个接口不完全一样，假设中国的身份验证需要身份证号和名字两个条件
        return chineseIdentify.check(idCardNumber, getName(idCardNumber));
    }

    private String getName(String idCardNumber) {
        return db.get(idCardNumber);
    }
}

package designpattern.adapter;

public class Client {
    public static void main(String[] args) {

        ForeignIdentify foreignIdentify = new ForeignIdentify();
        enter("F001", foreignIdentify);
        enter("F004", foreignIdentify);

        // 直接用身份证号来验证
        enter("C003", foreignIdentify);
        // 换成护照
        foreignIdentify = new ChinesePassport();
        enter("C003", foreignIdentify);
    }

    public static void enter(String number, ForeignIdentify foreignIdentify) {
        System.out.println("=============外国入关==============");
        if (foreignIdentify.check(number)) {
            System.out.println("允许入关！");
        } else {
            System.out.println("禁止入关！");
        }

    }
}

=============外国入关==============
F001是外国的合法公民
允许入关！
=============外国入关==============
F004不是外国的合法公民
禁止入关！
=============外国入关==============
C003不是外国的合法公民
禁止入关！
=============外国入关==============
王五C003是中国的合法公民
允许入关！