Создание новых объектов: композиция, наследование, делегирование

Композиция template<class _Ty, class _Container = deque<_Ty> > class stack { public: … size_type size() const reference top() { // return last element of mutable stack return (c.back()); } const_reference top() const { // return last element of nonmutable stack return (c.back()); } void push(const value_type& _Val) { // insert element at end c.push_back(_Val); } void pop() { // erase last element c.pop_back(); } protected: _Container c; // the underlying container };

template<class _Ty, class _Container = deque<_Ty> >

class stack

{

public:

…

size_type size() const reference top()

{ // return last element of mutable stack

return (c.back());

}

const_reference top() const

{ // return last element of nonmutable stack

return (c.back());

}

void push(const value_type& _Val)

{ // insert element at end

c.push_back(_Val);

}

void pop()

{ // erase last element

c.pop_back();

}

protected:

_Container c; // the underlying container

};

Композиция class Engine { public void start() {} public void rev() {} public void stop() {} } class Wheel { public void inflate(int psi) {} } class Window { public void rollup() {} public void rolldown() {} } class Door { public Window window = new Window(); public void open() {} public void close() {} } public class Car { public Engine engine = new Engine(); public Wheel[] wheel = new Wheel[4]; public Door left = new Door(), p ublic Door right = new Door(); public Car() { for(int i = 0; i < 4; i++) wheel[i] = new Wheel(); } } public static void main(String[] args) { Car car = new Car(); car.left.window.rollup(); car.wheel[0].inflate(72); }

class Engine {

public void start() {}

public void rev() {}

public void stop() {}

}

class Wheel {

public void inflate(int psi) {}

}

class Window {

public void rollup() {}

public void rolldown() {}

}

class Door {

public Window window = new Window();

public void open() {}

public void close() {}

}

public class Car

{

public Engine engine = new Engine();

public Wheel[] wheel = new Wheel[4];

public Door left = new Door(),

p ublic Door right = new Door();

public Car()

{

for(int i = 0; i < 4; i++)

wheel[i] = new Wheel();

}

}

public static void main(String[] args)

{

Car car = new Car();

car.left.window.rollup();

car.wheel[0].inflate(72);

}

Композиция public class XOnlineListener : XListener { XParser m_Parser; IReader m_Reader; public XOnlineListener(string a_ListenerName, IReader a_Reader, XParser a_Parser) : base(a_ListenerName) { m_Parser = a_Parser; m_Reader = a_Reader; } protected override void ListenerLoop() { List<XCallInformation> calls = new List<XCallInformation>(); foreach (XBillingString billingString in m_Reader.Read()) { XCallInformation info = m_Parser.ParseAndProcess(billingString); if (info == null) { continue; } calls.Add(info); } XBilling.RegisterCall(calls); } }

public class XOnlineListener : XListener

{

XParser m_Parser;

IReader m_Reader;

public XOnlineListener(string a_ListenerName, IReader a_Reader, XParser a_Parser) : base(a_ListenerName)

{

m_Parser = a_Parser;

m_Reader = a_Reader;

}

protected override void ListenerLoop()

{

List<XCallInformation> calls = new List<XCallInformation>();

foreach (XBillingString billingString in m_Reader.Read())

{

XCallInformation info = m_Parser.ParseAndProcess(billingString);

if (info == null)

{

continue;

}

calls.Add(info);

}

XBilling.RegisterCall(calls);

}

}

Композиция XListenerPool.Instance.AddListener( new XOnlineListener(&quot;Unitel&quot;, new XComReader(&quot;Unitel&quot;, ConfigurationManager.AppSettings[&quot;UnitelPort&quot;]), new XUnitelParser())); XListenerPool.Instance.AddListener(new XOnlineListener(&quot;DX&quot;, new XIncrementFileReader(&quot;DX&quot;, ConfigurationManager.AppSettings[&quot; D xFile&quot;]), new XDxParser())); XListenerPool.Instance.AddListener(new XFileListener(&quot;Unitel Backup&quot;, &quot;UnitelBackup&quot;, new XBackupProcessor(&quot;Unitel&quot;, new XUnitelParser()))); XListenerPool.Instance.AddListener(new XFileListener(&quot;DX Backup&quot;, &quot;DXBackup&quot;, new XBackupProcessor(&quot;DX&quot;, new XDxParser()))); XListenerPool.Instance.AddListener(new XFileListener(&quot;IP&quot;, &quot;IP&quot;, new XIpProcessor()));

XListenerPool.Instance.AddListener(

new XOnlineListener(&quot;Unitel&quot;, new XComReader(&quot;Unitel&quot;, ConfigurationManager.AppSettings[&quot;UnitelPort&quot;]), new XUnitelParser()));

XListenerPool.Instance.AddListener(new XOnlineListener(&quot;DX&quot;, new XIncrementFileReader(&quot;DX&quot;, ConfigurationManager.AppSettings[&quot; D xFile&quot;]), new XDxParser()));

XListenerPool.Instance.AddListener(new XFileListener(&quot;Unitel Backup&quot;, &quot;UnitelBackup&quot;, new XBackupProcessor(&quot;Unitel&quot;, new XUnitelParser())));

XListenerPool.Instance.AddListener(new XFileListener(&quot;DX Backup&quot;, &quot;DXBackup&quot;, new XBackupProcessor(&quot;DX&quot;, new XDxParser())));

XListenerPool.Instance.AddListener(new XFileListener(&quot;IP&quot;, &quot;IP&quot;, new XIpProcessor()));

Наследование class A { public void DoSomething(); } class B : A { } A a = new A(); A a1 = new B(); B b = new B();

class A

{

public void DoSomething();

}

class B : A

{

}

A a = new A();

A a1 = new B();

B b = new B();

Наследование class A { public virtual void DoSomething(); } class B : A { public override void DoSomething(); } A a = new A(); A a1 = new B(); B b = new B(); a.DoSomething(); a1.DoSomething(); b.DoSomething();

class A

{

public virtual void DoSomething();

}

class B : A

{

public override void DoSomething();

}

A a = new A();

A a1 = new B();

B b = new B();

a.DoSomething();

a1.DoSomething();

b.DoSomething();

Наследование Пример про велосипеды

Пример про велосипеды

Особенности наследования

Полиморфизм

Виды наследования 1. Расширение существующего класса

1. Расширение существующего класса

2. Наследование от интерфейса public interface IReader { ICollection<XBillingString> Read(); void Start(); v oid Stop(); } public class XComReader : IReader { SerialPort m_Port = null; string m_PortName; public XComReader(string a_PortName) { m_PortName = a_PortName; } #region IReader Members public void Start() { … } public void Stop() { … } public ICollection<XBillingString> Read() { lock (m_Port) { if (!m_Port.IsOpen) { return new XBillingString[0]; } return new XBillingString[] { new XBillingString(m_Port.ReadLine()) }; } } #endregion }

public interface IReader

{

ICollection<XBillingString> Read();

void Start();

v oid Stop();

}

public class XComReader : IReader

{

SerialPort m_Port = null;

string m_PortName;

public XComReader(string a_PortName)

{

m_PortName = a_PortName;

}

#region IReader Members

public void Start() { … }

public void Stop() { … }

public ICollection<XBillingString> Read()

{

lock (m_Port)

{

if (!m_Port.IsOpen)

{

return new XBillingString[0];

}

return new XBillingString[] { new XBillingString(m_Port.ReadLine()) };

}

}

#endregion

}

3. Наследование от базового класса (абстрактного класса) abstract public class XParser { protected XParser() { } public string ParserName { get { return GetType().Name; } } public static XParser Create(string a_ParserName) { ... } public XCallInformation ParseAndProcess(XBillingString a_BillingString) { a_BillingString.SetParser(this); XCallInformation result = DoParse(a_BillingString); if (result == null) { XBilling.RegisterError(a_BillingString); } return result; } public XCallInformation Parse(XBillingString a_BillingString) { a_BillingString.SetParser(this); return DoParse(a_BillingString); } protected abstract XCallInformation DoParse(XBillingString a_BillingString); }

abstract public class XParser

{

protected XParser()

{

}

public string ParserName

{

get { return GetType().Name; }

}

public static XParser Create(string a_ParserName) { ... }

public XCallInformation ParseAndProcess(XBillingString a_BillingString)

{

a_BillingString.SetParser(this);

XCallInformation result = DoParse(a_BillingString);

if (result == null)

{

XBilling.RegisterError(a_BillingString);

}

return result;

}

public XCallInformation Parse(XBillingString a_BillingString)

{

a_BillingString.SetParser(this);

return DoParse(a_BillingString);

}

protected abstract XCallInformation DoParse(XBillingString a_BillingString);

}

public class XUnitelParser : XParser { public XUnitelParser() : base() { } protected override XCallInformation DoParse(XBillingString a_BillingString) { Regex parser = new Regex(@&quot;^[ ]*-[0-9]+[ ]*(([0-9]+).([0-9]+)) ([0-9]*)[ ]*([0-9]+)[ ]*(([0-9]+).([0-9]+)) ([0-9]+).([0-9]+).([0-9]+) ([0-9]+):([0-9]+):([0-9]+) ([0-9]+)[ ]*$&quot;); Match match = parser.Match(a_BillingString.BillingString.Trim()); if (!match.Success) { return null; } return new XCallInformation( ParserName, match.Groups[3].Value, match.Groups[4].Value, int.Parse(match.Groups[1].Value), int.Parse(match.Groups[2].Value) - 600, int.Parse(match.Groups[5].Value), int.Parse(match.Groups[6].Value) - 600, int.Parse(match.Groups[13].Value), new DateTime( 2000 + int.Parse(match.Groups[9].Value), int.Parse(match.Groups[8].Value), int.Parse(match.Groups[7].Value), int.Parse(match.Groups[10].Value), int.Parse(match.Groups[11].Value), int.Parse(match.Groups[12].Value)), a_BillingString ); } }

public class XUnitelParser : XParser

{

public XUnitelParser() : base()

{

}

protected override XCallInformation DoParse(XBillingString a_BillingString)

{

Regex parser = new Regex(@&quot;^[ ]*-[0-9]+[ ]*(([0-9]+).([0-9]+)) ([0-9]*)[ ]*([0-9]+)[ ]*(([0-9]+).([0-9]+)) ([0-9]+).([0-9]+).([0-9]+) ([0-9]+):([0-9]+):([0-9]+) ([0-9]+)[ ]*$&quot;);

Match match = parser.Match(a_BillingString.BillingString.Trim());

if (!match.Success)

{

return null;

}

return new XCallInformation(

ParserName,

match.Groups[3].Value,

match.Groups[4].Value,

int.Parse(match.Groups[1].Value),

int.Parse(match.Groups[2].Value) - 600,

int.Parse(match.Groups[5].Value),

int.Parse(match.Groups[6].Value) - 600,

int.Parse(match.Groups[13].Value),

new DateTime(

2000 + int.Parse(match.Groups[9].Value),

int.Parse(match.Groups[8].Value),

int.Parse(match.Groups[7].Value),

int.Parse(match.Groups[10].Value),

int.Parse(match.Groups[11].Value),

int.Parse(match.Groups[12].Value)),

a_BillingString

);

}

}

4. Создание иерархии наследования

Делегирование

Заключение