- 技术人生
- Patterns in SOME –Mediator
Code in C#:
namespace
Mediator_DesignPattern
{
using System;
class Mediator
{
private DataProviderColleague dataProvider;
private DataConsumerColleague dataConsumer;
public void IntroduceColleagues(DataProviderColleague c1, DataConsumerColleague c2)
{
dataProvider = c1;
dataConsumer = c2;
}
public void DataChanged()
{
int i = dataProvider.MyData;
dataConsumer.NewValue(i);
}
}
class DataConsumerColleague
{
public void NewValue(int i)
{
Console.WriteLine("New value {0}", i);
}
}
class DataProviderColleague
{
private Mediator mediator;
private int iMyData=0;
public int MyData
{
get
{
return iMyData;
}
set
{
iMyData = value;
}
}
public DataProviderColleague(Mediator m)
{
mediator = m;
}
public void ChangeData()
{
iMyData = 403;
// Inform mediator that I have changed the data
if (mediator != null)
mediator.DataChanged();
}
}
///<summary>
/// Summary description for Client.
///</summary>
public class Client
{
public static int Main(string[] args)
{
Mediator m = new Mediator();
DataProviderColleague c1 = new DataProviderColleague(m);
DataConsumerColleague c2 = new DataConsumerColleague();
m.IntroduceColleagues(c1,c2);
c1.ChangeData();
return 0;
}
}
}
Code in SOME:
CMediator -> CDataProviderColleague[_dataProvider],->CDataConsumerColleague[_dataConsumer]
IntroduceColleagues(CDataProviderColleague, CDataConsumerColleague)
DataChanged()
CDataConsumerColleague
NewValue(int)
CDataProviderColleague ->CMediator[_mediator]
int MyData
(CMediator) /* means the parameter will be assigned to _mediator*/
ChangeData()
CClient
main
CClient.main
{
CMediator m.();
CDataProviderColleague c1.(_mediator=m);
CDataConsumerColleague c2.();
m.IntroduceColleagues(_dataProvider = c1,_dataConsumer = c2);
c1.ChangeData()
{
<% if(mediator != null )%>
<%{ %>
_mediator.DataChanged()
{
int i = dataProvider.MyData;
_dataConsumer.NewValue(i)
{
<% Console.WriteLine("New value {0}", i); %>
};
};
<%} %>
};
}
