Net设计模式实例之桥接模式( Bridge Pattern)(3)
2、代码
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1
、
抽象接口CustomersBase
及其具体实现类Customers
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class
CustomersBase
{
private DataObject
_dataObject;
protected string
group;
public
CustomersBase(string
group)
{
this
.group = group;
}
// Property
public DataObject
Data
{
set
{ _dataObject = value
; }
get
{ return
_dataObject; }
}
public virtual void
Next()
{
_dataObject.NextRecord();
}
public virtual void
Prior()
{
_dataObject.PriorRecord();
}
public virtual void
Add(string
customer)
{
_dataObject.AddRecord(customer);
}
public virtual void
Delete(string
customer)
{
_dataObject.DeleteRecord(customer);
}
public virtual void
Show()
{
_dataObject.ShowRecord();
}
public virtual void
ShowA ll
()
{
Console
.WriteLine("Customer Group: "
+ group);
_dataObject.ShowA ll
Records();
}
}
///
<summary>
///
The 'RefinedAbstraction' class
///
</summary>
class
Customers
: CustomersBase
{
// Constructor
public
Customers(string
group)
: base
(group)
{
}
public override void
ShowA ll
()
{
// Add separator lines
Console
.WriteLine();
Console
.WriteLine("**************************"
);
base
.ShowA ll
();
Console
.WriteLine("**************************"
);
}
}
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2
、
抽象数据对象类DataObject
及其具体实现类CustomersData
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abstract
class DataObject
{
public abstract void
NextRecord();
public abstract void
PriorRecord();
public abstract void
AddRecord(string
name);
public abstract void
DeleteRecord(string
name);
public abstract void
ShowRecord();
public abstract void
ShowA ll
Records();
}
///
<summary>
///
The 'ConcreteImplementor' class
///
</summary>
class
CustomersData
: DataObject
{
private List
<string
> _customers = new List
<string
>();
private int
_current = 0;
public
CustomersData()
{
// Loaded from a database
_customers.Add("James Hao"
);
_customers.Add("
灵动生活"
);
_customers.Add("
郝**"
);
_customers.Add("*
宪*"
);
_customers.Add("**
玮"
);
}
public override void
NextRecord()
{
if
(_current <= _customers.Count - 1)
{
_current++;
}
}
public override void
PriorRecord()
{
if
(_current > 0)
{
_current--;
}
}
public override void
AddRecord(string
customer)
{
_customers.Add(customer);
}
public override void
DeleteRecord(string
customer)
{
_customers.Remove(customer);
}
public override void
ShowRecord()
{
Console
.WriteLine(_customers[_current]);
}
public override void
ShowA ll
Records()
{
foreach
(string
customer in
_customers)
{
Console
.WriteLine(" "
+ customer);
}
}
}
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