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在這裏,我正在構建帶有n個葉和分支的菜單生成器,現在我無法正確返回構建器的引用而無法解決問題。嵌套的菜單生成器永遠不會在c中正確結束#
這裏是代碼
public interface IMenuBuilder
{
IMenuBuilder AddLeaf(string name);
ISubMenuBuilder AddBranch(string name);
void Build();
}
public interface ISubMenuBuilder : IMenuBuilder
{
ISubMenuBuilder AddLeaf(string name);
INestSubMenuBuilder AddBranch(string name);
IMenuBuilder Build();
}
public interface INestSubMenuBuilder : ISubMenuBuilder
{
INestSubMenuBuilder AddLeaf(string name);
INestSubMenuBuilder AddBranch(string name);
ISubMenuBuilder Build();
}
public class MenuBuilder : IMenuBuilder
{
List<Menu> menus = new List<Menu>();
public IMenuBuilder AddLeaf(string name)
{
var menu = new RootMenu { Name = name };
menus.Add(menu);
return this;
}
public ISubMenuBuilder AddBranch(string name)
{
var menu = new RootMenu { Name = name };
menus.Add(menu);
return new SubMenuBuilder(this, menu);
}
public void Build()
{
}
}
public class SubMenuBuilder : ISubMenuBuilder
{
private IMenuBuilder menuBuilder;
private ISubMenuHolder menu;
public SubMenuBuilder(IMenuBuilder menuBuilder, ISubMenuHolder menu)
{
this.menuBuilder = menuBuilder;
this.menu = menu;
}
protected SubMenuBuilder(ISubMenuHolder menu)
{
this.menu = menu;
}
public ISubMenuBuilder AddLeaf(string name)
{
var leafMenu = new LeafMenu { Name = name };
leafMenu.ParentId = (leafMenu as Menu).Id;
menu.AddSubMenu(leafMenu);
return this;
}
public INestSubMenuBuilder AddBranch(string name)
{
var branchMenu = new BranchMenu { Name = name };
branchMenu.ParentId = (branchMenu as Menu).Id;
menu.AddSubMenu(branchMenu);
return new NestSubMenuBuilder(this, branchMenu);
}
public IMenuBuilder Build()
{
return menuBuilder;
}
IMenuBuilder IMenuBuilder.AddLeaf(string name)
{
this.AddLeaf(name);
return this;
}
ISubMenuBuilder IMenuBuilder.AddBranch(string name)
{
this.AddBranch(name);
return this;
}
void IMenuBuilder.Build()
{
}
}
public class NestSubMenuBuilder : INestSubMenuBuilder
{
private ISubMenuBuilder subMenuBuilder;
private ISubMenuHolder branchMenu;
public NestSubMenuBuilder(ISubMenuBuilder subMenuBuilder, ISubMenuHolder branchMenu)
{
this.subMenuBuilder = subMenuBuilder;
this.branchMenu = branchMenu;
}
public INestSubMenuBuilder AddLeaf(string name)
{
var leafMenu = new LeafMenu { Name = name };
leafMenu.ParentId = (leafMenu as Menu).Id;
branchMenu.AddSubMenu(leafMenu);
return this;
}
public ISubMenuBuilder Build()
{
return subMenuBuilder;
}
public INestSubMenuBuilder AddBranch(string name)
{
var menu = new BranchMenu { Name = name };
menu.ParentId = (branchMenu as Menu).Id;
branchMenu.AddSubMenu(menu);
return new NestSubMenuBuilder(this, menu);
}
ISubMenuBuilder ISubMenuBuilder.AddLeaf(string name)
{
this.AddLeaf(name);
return this;
}
IMenuBuilder ISubMenuBuilder.Build()
{
return subMenuBuilder;
}
IMenuBuilder IMenuBuilder.AddLeaf(string name)
{
this.AddLeaf(name);
return this;
}
ISubMenuBuilder IMenuBuilder.AddBranch(string name)
{
this.AddBranch(name);
return this;
}
void IMenuBuilder.Build()
{
}
}
這是我的建設者的代碼和這裏是我在使用該API構建了問題的例子。
builder
.AddLeaf("Leaf 4")
.AddBranch("Branch 2") // subMenuBuilder
.AddLeaf("Branch 2 -> Leaf 1")
.AddBranch("Branch 2 -> Branch 1") //nestSubMenuBuilder 1
.AddLeaf("Branch 2 -> Branch 1 -> Leaf 3")
.AddBranch("Branch 2 -> Branch 1 -> Branch 1") //nestSubMenuBuilder 2
.AddLeaf("Branch 2 -> Branch 1 -> Branch 1 -> Leaf 1")
.Build() // nestSubMenuBuilder 1
.AddLeaf("Branch 2 -> Leaf 4")
.Build() // subMenuBuilder
.AddLeaf("Branch 2 -> Leaf 2")
.Build();// menubuilder
這裏我沒有得到最後的菜單生成器引用回來添加新的葉子和分支。
IM沒能獲得最後的構建初始菜單生成參考方法。 –
與添加的'void Build()'方法不一樣的問題?你使用的是什麼API(有沒有與它相關的標籤或某個文檔API?)或者這更像是一個代碼評論問題?我真的不明白爲什麼最初的'IMenuBuilder'不是你界面中所有'Build'方法的所有者,以及爲什麼你要讓子接口覆蓋它們。重寫的子接口不應該改變構建方法,它應該返回簡單地返回所有情況下的'IMenuBuilder' – Icepickle
「現在我無能爲力了......」我很難破解:D –