文献速递：多模态深度学习在医疗中的应用--多模式婴儿脑分割技术：模糊引导深度学习

🔍目的

🔍解释

真实世界例子

通俗的说

维基百科

程序实例

按照上述的真实世界案例。首先，我们为王国中的对象提供了一些接口和实现。

public interface Castle {
  String getDescription();
}

public interface King {
  String getDescription();
}

public interface Army {
  String getDescription();
}

// Elven implementations ->
public class ElfCastle implements Castle {
  static final String DESCRIPTION = "This is the Elven castle!";
  @Override
  public String getDescription() {
    return DESCRIPTION;
  }
}
public class ElfKing implements King {
  static final String DESCRIPTION = "This is the Elven king!";
  @Override
  public String getDescription() {
    return DESCRIPTION;
  }
}
public class ElfArmy implements Army {
  static final String DESCRIPTION = "This is the Elven Army!";
  @Override
  public String getDescription() {
    return DESCRIPTION;
  }
}

// Orcish implementations similarly -> ...

然后我们有了王国工厂的抽象和实现 

public interface KingdomFactory {
  Castle createCastle();
  King createKing();
  Army createArmy();
}

public class ElfKingdomFactory implements KingdomFactory {
  public Castle createCastle() {
    return new ElfCastle();
  }
  public King createKing() {
    return new ElfKing();
  }
  public Army createArmy() {
    return new ElfArmy();
  }
}

public class OrcKingdomFactory implements KingdomFactory {
  public Castle createCastle() {
    return new OrcCastle();
  }
  public King createKing() {
    return new OrcKing();
  }
  public Army createArmy() {
    return new OrcArmy();
  }
}

我们可以制作相关对象的系列，即精灵王国工厂创建了精灵城堡，国王和军队等。 

var factory = new ElfKingdomFactory();
var castle = factory.createCastle();
var king = factory.createKing();
var army = factory.createArmy();

castle.getDescription();
king.getDescription();
army.getDescription();

程序输出

This is the Elven castle!
This is the Elven king!
This is the Elven Army!

 我们可以为不同的王国工厂设计工厂。 在此示例中，我们创建了FactoryMaker，负责返回ElfKingdomFactory或OrcKingdomFactory的实例。 客户可以使用FactoryMaker来创建所需的具体工厂，该工厂随后将生产不同的具体对象（军队，国王，城堡）。 在此示例中，我们还使用了一个枚举来参数化客户要求的王国工厂类型。

public static class FactoryMaker {

    public enum KingdomType {
        ELF, ORC
    }

    public static KingdomFactory makeFactory(KingdomType type) {
        return switch (type) {
            case ELF -> new ElfKingdomFactory();
            case ORC -> new OrcKingdomFactory();
            default -> throw new IllegalArgumentException("KingdomType not supported.");
        };
    }
}

    public static void main(String[] args) {
        var app = new App();

        LOGGER.info("Elf Kingdom");
        app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
        LOGGER.info(app.getArmy().getDescription());
        LOGGER.info(app.getCastle().getDescription());
        LOGGER.info(app.getKing().getDescription());

        LOGGER.info("Orc Kingdom");
        app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC));
        --similar use of the orc factory
    }

🔍类图

Abstract Factory class diagram 

🔍适用场景

🔍后果