// トラブル解決の手順
public void DoSupport(Trouble trouble)
{
if (Resolve(trouble))
{
Done(trouble);
}
else if (next != null)
{
next.DoSupport(trouble);
}
else
{
Fail(trouble);
}
}
// 未解決
protected virtual void Fail(Trouble trouble)
{
Console.WriteLine(trouble + " cannot be resolved.");
}
// 解決
protected virtual void Done(Trouble trouble)
{
Console.WriteLine(trouble + " is resolved by " + this + ".");
}
// 解決用メソッド protected abstract bool Resolve(Trouble trouble);
// 解決用メソッド
protected override bool Resolve(Trouble trouble)
{
return(trouble.Number == number);
}
// 解決用メソッド
protected override bool Resolve(Trouble trouble)
{
return(trouble.Number < limit);
}
// 解決用メソッド
protected override bool Resolve(Trouble trouble)
{
return(false); // 自分は何も処理しない
}