package com.bamboo;

/**
 * 自由扩展工厂模式【复杂】
 */
public class FactoryCalculatorDemo {
    public static abstract class Calculator{
        private String type;
        public Calculator(String type) {
            this.type = type;
        }
        public void calculate(){
            System.out.println(" This "+type+" calculate is done");
        }
    }
    public static class PL3Calculator extends Calculator {
        public PL3Calculator() {
            super("PL3");
        }
    }
    public static class DLTCalculator extends Calculator {
        public DLTCalculator() { super("DLT"); }
    }
    public static class BSKCalculator extends Calculator {
        public BSKCalculator() {
            super("BSK");
        }
    }
    public static class FTCalculator extends Calculator {
        public FTCalculator() {
            super("FT");
        }
    }

    public static abstract class CalculatorFactory{
        public abstract Calculator createCalculator(String type);
    }

    public static class NumberLotteryCalculatorFactory extends CalculatorFactory {
        @Override
        public Calculator createCalculator(String type){
            if ("PL3".equals(type))
            { return new PL3Calculator(); }
            else if ("DLT".equals(type))
            { return new DLTCalculator(); }
            return null;
        }
    }

    public static class JCCalculatorFactory extends CalculatorFactory {
        @Override
        public Calculator createCalculator(String type){
            if ("BSK".equals(type))
            { return new BSKCalculator(); }
            else if ("FT".equals(type))
            { return new FTCalculator(); }
            return null;
        }
    }

    public static void main(String[] args) {
        //调用者，知悉使用的子类
        CalculatorFactory calculatorFactory=new NumberLotteryCalculatorFactory();
        calculatorFactory.createCalculator("PL3").calculate();
        calculatorFactory=new JCCalculatorFactory();
        calculatorFactory.createCalculator("FT").calculate();
    }
}