add Behavioral Patterns examples Part 2

Author: QianMo

Assets/Behavioral Patterns/Mediator Pattern/Example1.meta

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+//-------------------------------------------------------------------------------------
+//	MediatorExample1.cs
+//-------------------------------------------------------------------------------------
+
+using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+
+//This real-world code demonstrates the Mediator pattern facilitating loosely coupled communication between 
+//different Participants registering with a Chatroom.The Chatroom is the central hub through which all communication takes place.
+//At this point only one-to-one communication is implemented in the Chatroom, but would be trivial to change to one-to-many.
+
+namespace MediatorExample1
+{
+ public class MediatorExample1 : MonoBehaviour
+ {
+ void Start()
+ {
+ // Create chatroom
+ Chatroom chatroom = new Chatroom();
+
+ // Create participants and register them
+ Participant George = new Beatle("George");
+ Participant Paul = new Beatle("Paul");
+ Participant Ringo = new Beatle("Ringo");
+ Participant John = new Beatle("John");
+ Participant Yoko = new NonBeatle("Yoko");
+
+ chatroom.Register(George);
+ chatroom.Register(Paul);
+ chatroom.Register(Ringo);
+ chatroom.Register(John);
+ chatroom.Register(Yoko);
+
+ // Chatting participants
+ Yoko.Send("John", "Hi John!");
+ Paul.Send("Ringo", "All you need is love");
+ Ringo.Send("George", "My sweet Lord");
+ Paul.Send("John", "Can't buy me love");
+ John.Send("Yoko", "My sweet love");
+
+ }
+ }
+
+ /// <summary>
+ /// The 'Mediator' abstract class
+ /// </summary>
+ abstract class AbstractChatroom
+ {
+ public abstract void Register(Participant participant);
+ public abstract void Send(string from, string to, string message);
+ }
+
+ /// <summary>
+ /// The 'ConcreteMediator' class
+ /// </summary>
+ class Chatroom : AbstractChatroom
+ {
+ private Dictionary<string, Participant> _participants =
+ new Dictionary<string, Participant>();
+
+ public override void Register(Participant participant)
+ {
+ if (!_participants.ContainsValue(participant))
+ {
+ _participants[participant.Name] = participant;
+ }
+
+ participant.Chatroom = this;
+ }
+
+ public override void Send( string from, string to, string message)
+ {
+ Participant participant = _participants[to];
+
+ if (participant != null)
+ {
+ participant.Receive(from, message);
+ }
+ }
+ }
+
+ /// <summary>
+ /// The 'AbstractColleague' class
+ /// </summary>
+ class Participant
+ {
+ private Chatroom _chatroom;
+ private string _name;
+
+ // Constructor
+ public Participant(string name)
+ {
+ this._name = name;
+ }
+
+ // Gets participant name
+ public string Name
+ {
+ get { return _name; }
+ }
+
+ // Gets chatroom
+ public Chatroom Chatroom
+ {
+ set { _chatroom = value; }
+ get { return _chatroom; }
+ }
+
+ // Sends message to given participant
+ public void Send(string to, string message)
+ {
+ _chatroom.Send(_name, to, message);
+ }
+
+ // Receives message from given participant
+ public virtual void Receive(string from, string message)
+ {
+ Debug.Log(from + " to " + Name + ": '" + message + "'");
+ }
+ }
+
+ /// <summary>
+ /// A 'ConcreteColleague' class
+ /// </summary>
+ class Beatle : Participant
+ {
+ // Constructor
+ public Beatle(string name)
+ : base(name)
+ {
+ }
+
+ public override void Receive(string from, string message)
+ {
+ Debug.Log("To a Beatle: ");
+ base.Receive(from, message);
+ }
+ }
+
+ /// <summary>
+ /// A 'ConcreteColleague' class
+ /// </summary>
+ class NonBeatle : Participant
+ {
+ // Constructor
+ public NonBeatle(string name)
+ : base(name)
+ {
+ }
+
+ public override void Receive(string from, string message)
+ {
+ Debug.Log("To a non-Beatle: ");
+ base.Receive(from, message);
+ }
+ }
+}

Assets/Behavioral Patterns/Mediator Pattern/Example1/MediatorExample1.cs

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+//-------------------------------------------------------------------------------------
+//	MediatorExample1.cs
+//-------------------------------------------------------------------------------------
+
+using UnityEngine;
+using System.Collections;
+
+//This real-world code demonstrates the Memento pattern which temporarily saves and then restores the SalesProspect's internal state.
+
+namespace MementoExample1
+{
+ public class MementoExample1 : MonoBehaviour
+ {
+ void Start()
+ {
+ SalesProspect s = new SalesProspect();
+ s.Name = "Bruce";
+ s.Phone = "(412) 256-6666";
+ s.Budget = 25000.0;
+
+ // Store internal state
+ ProspectMemory m = new ProspectMemory();
+ m.Memento = s.SaveMemento();
+
+ // Continue changing originator
+ s.Name = "Oliver";
+ s.Phone = "(310) 209-8888";
+ s.Budget = 1000000.0;
+
+ // Restore saved state
+ s.RestoreMemento(m.Memento);
+
+ }
+ }
+
+ /// <summary>
+ /// The 'Originator' class
+ /// </summary>
+ class SalesProspect
+ {
+ private string _name;
+ private string _phone;
+ private double _budget;
+
+ // Gets or sets name
+ public string Name
+ {
+ get { return _name; }
+ set
+ {
+ _name = value;
+ Debug.Log("Name: " + _name);
+ }
+ }
+
+ // Gets or sets phone
+ public string Phone
+ {
+ get { return _phone; }
+ set
+ {
+ _phone = value;
+ Debug.Log("Phone: " + _phone);
+ }
+ }
+
+ // Gets or sets budget
+ public double Budget
+ {
+ get { return _budget; }
+ set
+ {
+ _budget = value;
+ Debug.Log("Budget: " + _budget);
+ }
+ }
+
+ // Stores memento
+ public Memento SaveMemento()
+ {
+ Debug.Log("\nSaving state --\n");
+ return new Memento(_name, _phone, _budget);
+ }
+
+ // Restores memento
+ public void RestoreMemento(Memento memento)
+ {
+ Debug.Log("\nRestoring state --\n");
+ this.Name = memento.Name;
+ this.Phone = memento.Phone;
+ this.Budget = memento.Budget;
+ }
+ }
+
+ /// <summary>
+ /// The 'Memento' class
+ /// </summary>
+ class Memento
+ {
+ private string _name;
+ private string _phone;
+ private double _budget;
+
+ // Constructor
+ public Memento(string name, string phone, double budget)
+ {
+ this._name = name;
+ this._phone = phone;
+ this._budget = budget;
+ }
+
+ // Gets or sets name
+ public string Name
+ {
+ get { return _name; }
+ set { _name = value; }
+ }
+
+ // Gets or set phone
+ public string Phone
+ {
+ get { return _phone; }
+ set { _phone = value; }
+ }
+
+ // Gets or sets budget
+ public double Budget
+ {
+ get { return _budget; }
+ set { _budget = value; }
+ }
+ }
+
+ /// <summary>
+ /// The 'Caretaker' class
+ /// </summary>
+ class ProspectMemory
+ {
+ private Memento _memento;
+
+ // Property
+ public Memento Memento
+ {
+ set { _memento = value; }
+ get { return _memento; }
+ }
+ }
+}