[英]How to mulitiply inherit from abstract base classes?
I have some abstract base classes to be used on multiple implementations.我有一些抽象基类可用于多个实现。
Base classes:基类:
public abstract class BaseX
{
public string A { get; set; }
}
public abstract class BaseY : BaseX
{
public string B { get; set; }
}
For each use case, I want to create from these base classes specific classes like:对于每个用例,我想从这些基类创建特定类,例如:
public abstract SpecificX : BaseX
{
public string C { get; set; }
}
public abstract SpecificY : BaseY
{
public string D { get; set; }
}
All classes that derive from SpecificY
should contain all the properties A, B, C, D.从
SpecificY
派生的所有类都应包含所有属性A、B、C、D。
My problem now is, that SpecificY
doesn't have the property C from SpecificX
, because I cannot do multiple inheritance like我现在的问题是,
SpecificY
没有来自SpecificX
的属性 C,因为我不能像这样进行多重继承
public abstract SpecificY : BaseY, SpecificX
My only idea would be to use Interface like this:我唯一的想法是使用这样的接口:
public Interface ISpecificX
{
string C { get; set; }
}
public abstract SpecificX : BaseX, ISpecificX
{
public string C { get; set; }
}
public abstract SpecificY : BaseY, ISpecificY
{
public string D { get; set; }
public string C { get; set; } <== redundancy
}
But then I'd need to implement C twice.但是我需要实现 C 两次。 And as soon as C is becoming more than a simple Property, things get ugly.
一旦 C 变得不仅仅是一个简单的属性,事情就会变得丑陋。 Is there a better way to create this structure?
有没有更好的方法来创建这种结构?
Thanks in advance,提前致谢,
Frank坦率
I would strongly suggest to favour composition over inhertiance - as propsed by the GoF.我强烈建议支持组合而不是继承- 正如 GoF 所支持的那样。 This way you do not inherit a given class, but just use an instance of it.
这样你就不会继承给定的类,而只是使用它的一个实例。 Then you can easily have all your properties without any duplication:
然后,您可以轻松拥有所有属性而无需任何重复:
class BaseX { ... }
class BaseY { ... }
class SpecificY : BaseY
{
private readonly SpecificX b = new SpecificX();
public string A { get => this.b.A; set => this.b.A = value; } // delegate the call
public string B { get; set; }
public string C { get => this.b.C; set => this.b.C = value; } // delegate the call
public string D { get; set; }
}
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