An example of ASP. _php Instance

Copy CodeThe code is as follows:
Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Text;
Namespace Test
{
Class Program
{
static void Main (string[] args)
{
var customer = new Customer
{
IsActive = True,
Latefees = 100M,
Totalrentnumber = 10
};
Console.WriteLine (Customer. Canrent ());
Console.readkey ();
}
}
public interface ISpecification
{
///
Is it possible to rent
///
BOOL IsSatisfiedBy (T entity);
///
and operation
///
ISpecification and (ISpecification Other);
///
No action
///
ISpecification Not ();
}
///
Base class
///
Public abstract class Compositespecification : ISpecification
{
public abstract bool IsSatisfiedBy (T candidate);
Public ISpecification and (ISpecification Other)
{
return new Andspecification (This, other);
}
Public ISpecification Not ()
{
return new Notspecification (this);
}
}
///
and operation
///
public class Andspecification : compositespecification
{
Private ISpecification Leftspecification;
Private ISpecification Rightspecification;
Public Andspecification (ISpecification Leftspecification, ISpecification Rightspecification)
{
This.leftspecification = leftspecification;
This.rightspecification = rightspecification;
}
public override bool IsSatisfiedBy (T entity)
{
return Leftspecification.issatisfiedby (Entity) && Rightspecification.issatisfiedby (entity);
}
}
///
No action
///
public class Notspecification : compositespecification
{
Private ISpecification Innerspecification;
Public Notspecification (ISpecification Innerspecification)
{
This.innerspecification = innerspecification;
}
public override bool IsSatisfiedBy (T entity)
{
return!innerspecification.issatisfiedby (entity);
}
}
///
Whether the maximum number of required leases is reached
///
public class Hasreachedmaxspecification:compositespecification
{
public override bool IsSatisfiedBy (Customer entity)
{
return entity. Totalrentnumber > 5;
}
}
///
is activated
///
public class Customeractivespecification:compositespecification
{
public override bool IsSatisfiedBy (Customer entity)
{
return entity. IsActive;
}
}
///
Do you owe a fee
///
public class Customerhaslatefeesspecification:compositespecification
{
public override bool IsSatisfiedBy (Customer entity)
{
return entity. Latefees > 0;
}
}
public class Customer
{
Private ISpecification Hasreachedrentalthreshold;
Private ISpecification customerisactive;
Private ISpecification customerhaslatefees;
Public Customer ()
{
Hasreachedrentalthreshold = new Hasreachedmaxspecification ();
Customerisactive = new Customeractivespecification ();
Customerhaslatefees = new Customerhaslatefeesspecification ();
}
///
//user Rental DVD number
//
public int totalrentnumber
{
get;
Set;
}
///
//The account is activated
//
public bool IsActive
{
get;
Set;
}
///
//user not yet owed fees
//
Public decimal latefees
{
get;
Set;
}
public bool Canrent ()
{
ISpecification canrent = Customerisactive.and (hasreachedren Talthreshold.not ()). and (Customerhaslatefees.not ());
Return Canrent.issatisfiedby (this);
}
}
}

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