04-04-设计模式 建造者模式

package com.dance.design.designmodel.buildmodel;

import lombok.Builder;
import lombok.Data;

/**
 * 抽象房子
 */
public abstract class AbsHouse {

    /**
     * 建造
     */
    public void build(){
        buildBasic();
        buildWalls();
        buildTop();
    }

    /**
     * 打桩
     * @param basic 地基
     */
    public abstract void buildBasic();

    /**
     * 砌墙
     * @param walls 墙
     */
    public abstract void buildWalls();

    /**
     * 封顶
     * @param top 顶部颜色
     */
    public abstract void buildTop();
}

package com.dance.design.designmodel.buildmodel;

public class CommonHouse extends AbsHouse{

    @Override
    public void buildBasic() {
        System.out.println("建造普通房子的地基");
    }

    @Override
    public void buildWalls() {
        System.out.println("建造普通房子的墙");
    }

    @Override
    public void buildTop() {
        System.out.println("建造普通房子的顶");
    }
}

package com.dance.design.designmodel.buildmodel;

public class Client {
    public static void main(String[] args) {
        AbsHouse absHouse = new CommonHouse();
        absHouse.build();
    }
}

package com.dance.design.designmodel.buildmodel.build;

import lombok.Data;
import lombok.Setter;

public class Client2 {
    public static void main(String[] args) {
        // 建造普通的房子
        // 创建指挥者 传入建造的具体实现
        HouseDirector houseDirector = new HouseDirector(new CommonHouse());
        // 建造
        House house = houseDirector.constructHouse();

        // 设置建造高楼大厦
        houseDirector.setHouseBuilder(new HighHouse());
        // 建造
        house = houseDirector.constructHouse();
    }
}

/**
 * 产品
 */
@Data
class House{
    private String basic;
    private String wall;
    private String roofed;
}

/**
 * 抽象建造者
 */
abstract class HouseBuilder{

    // 组合产品
    protected House house = new House();

    public abstract void buildBasic();

    public abstract void buildWalls();

    public abstract void buildRoofed();

    /**
     * 建造
     * @return 房子
     */
    public House buildHouse(){
        return house;
    }

}

/**
 * 普通房子
 */
class CommonHouse extends HouseBuilder{
    @Override
    public void buildBasic() {
        System.out.println("打地基5m");
    }

    @Override
    public void buildWalls() {
        System.out.println("砌墙10m");
    }

    @Override
    public void buildRoofed() {
        System.out.println("封顶10m2");
    }
}
/**
 * 高楼大厦
 */
class HighHouse extends HouseBuilder{
    @Override
    public void buildBasic() {
        System.out.println("打地基20m");
    }

    @Override
    public void buildWalls() {
        System.out.println("砌墙200m");
    }

    @Override
    public void buildRoofed() {
        System.out.println("封顶200m2");
    }
}

/**
 * 指挥者
 */
class HouseDirector{

    @Setter
    private HouseBuilder houseBuilder = null;

    /**
     * 传入具体的 要建造的房子
     * @param houseBuilder
     */
    public HouseDirector(HouseBuilder houseBuilder) {
        this.houseBuilder = houseBuilder;
    }

    // 建造流程交给指挥者
    public House constructHouse(){
        houseBuilder.buildBasic();
        houseBuilder.buildWalls();
        houseBuilder.buildRoofed();
        return houseBuilder.buildHouse();
    }

}