Java达成的注册工厂模式

发布时间：2021-11-24 13:37:29 所属栏目：教程来源：互联网

导读：Java实现的注册工厂模式 package com.eric.reflect; import java.util.ArrayList; import java.util.Random; /* * factory interface * */ interface FactoryT { public T create(); } public class RegisterFactory { public static void main(String[] arg

Java实现的注册工厂模式


package com.eric.reflect;

import java.util.ArrayList;
import java.util.Random;
/*
* factory interface
* */
interface Factory<T> {
    public T create();
}

public class RegisterFactory {

    public static void main(String[] args) {
        System.out.println(Part.randomPart());
    }
}

class Part {
    private static ArrayList<Factory<? extends Part>> factoryList = new ArrayList<Factory<? extends Part>>();
    /*
     * registry all factory in factoryList when initialize class
     * */
    static {
        factoryList.add(new AirFilter().new AirFilterFactory());
        factoryList.add(new CabinFilter().new CabinFilterFactory());
        factoryList.add(new CabinBelt().new CabinBeltFactory());
        factoryList.add(new AirBelt().new AirBeltFactory());
    }

    public static Part randomPart() {
        return factoryList.get(new Random().nextInt(factoryList.size()))
                .create();
    }

    @Override
    public String toString() {
        return getClass().getSimpleName();
    }
}

class Filter extends Part {
}

class Belt extends Part {
}

class AirBelt extends Belt {
    class AirBeltFactory implements Factory<AirBelt> {
        public AirBelt create() {
            return new AirBelt();
        }
    }
}

class CabinBelt extends Belt {
    class CabinBeltFactory implements Factory<CabinBelt> {
        public CabinBelt create() {
            return new CabinBelt();
        }
    }
}

class AirFilter extends Filter {
    class AirFilterFactory implements Factory<AirFilter> {
        public AirFilter create() {
            return new AirFilter();
        }
    }
}

class CabinFilter extends Filter {
    class CabinFilterFactory implements Factory<CabinFilter> {
        public CabinFilter create() {
            return new CabinFilter();
        }
    }
}

/*
*
* History:
*
*
*
* $Log: $
*/

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