The Power of a POC

using System;
using System.Collections.Generic;
using System.Data.Objects;
using System.Linq;
using System.Runtime.Serialization;

using EntityModel = AdventureWorksEntityModel;


namespace AdventureWorksModel
{
    [DataContract(IsReference = true)]
    public partial class Contact : PocoBase, IExtensibleDataObject
    {
   		// Class Name
		public const string CONTACT = "Contact";
		
		// Property Names
        public const string CONTACT_ID = "ContactID";
        public const string ADDITIONAL_CONTACT_INFO = "AdditionalContactInfo";
        public const string EMAIL_ADDRESS = "EmailAddress";
        public const string EMAIL_PROMOTION = "EmailPromotion";
        public const string FIRST_NAME = "FirstName";
        public const string LAST_NAME = "LastName";
        public const string MIDDLE_NAME = "MiddleName";
        public const string MODIFIED_DATE = "ModifiedDate";
        public const string NAME_STYLE = "NameStyle";
        public const string PASSWORD_HASH = "PasswordHash";
        public const string PASSWORD_SALT = "PasswordSalt";
        public const string PHONE = "Phone";
        public const string ROWGUID = "rowguid";
        public const string SUFFIX = "Suffix";
        public const string TITLE = "Title";

		// Data Members - Keys
        [DataMember(EmitDefaultValue = false)] public Int32 ContactID { get; private set; }

		// Data Members
        [DataMember(EmitDefaultValue = false)] public String AdditionalContactInfo { get; set; }
        [DataMember(EmitDefaultValue = false)] public String EmailAddress { get; set; }
        [DataMember(EmitDefaultValue = false)] public Int32 EmailPromotion { get; set; }
        [DataMember(EmitDefaultValue = false)] public String FirstName { get; set; }
        [DataMember(EmitDefaultValue = false)] public String LastName { get; set; }
        [DataMember(EmitDefaultValue = false)] public String MiddleName { get; set; }
        [DataMember(EmitDefaultValue = false)] public DateTime ModifiedDate { get; set; }
        [DataMember(EmitDefaultValue = false)] public Boolean NameStyle { get; set; }
        [DataMember(EmitDefaultValue = false)] public String PasswordHash { get; set; }
        [DataMember(EmitDefaultValue = false)] public String PasswordSalt { get; set; }
        [DataMember(EmitDefaultValue = false)] public String Phone { get; set; }
        [DataMember(EmitDefaultValue = false)] public Guid rowguid { get; set; }
        [DataMember(EmitDefaultValue = false)] public String Suffix { get; set; }
        [DataMember(EmitDefaultValue = false)] public String Title { get; set; }

		// References back to Contact
        [DataMember(EmitDefaultValue = false)] public IList<Individual> Individual { get; set; }
        [DataMember(EmitDefaultValue = false)] public IList<SalesOrderHeader> SalesOrderHeader { get; set; }

		public ExtensionDataObject ExtensionData { get; set; }

		//
		// Public Class Methods
		//

   		public override IList<KeyValuePair<string, object>> GetKeys()
    	{
			return new List<KeyValuePair<string, object>> 
			{ 
				new KeyValuePair<string, object>(CONTACT_ID, ContactID)
			};
    	}

    	public PocoReference<Contact> GetReference()
		{
			PocoReference<Contact> reference = GetReference(ContactID);
			reference.PocoKey.ID = ObjectID;
			return reference; 
		}

		public static PocoReference<Contact> GetReference(Int32 contactID)
		{
			List<KeyValuePair<string, object>> pairs = new List<KeyValuePair<string, object>> 
			{ 
				new KeyValuePair<string, object>(CONTACT_ID, contactID)
			};

			return GetReference(new PocoKey { Name = CONTACT, KeyValues = pairs });
		}		
    	
    	private static PocoReference<Contact> GetReference(PocoKey pocoKey)
		{
			return new PocoReference<Contact>
			{
				PocoKey = pocoKey
			};
		}

		//
		// Repository Calls
		//
		
		public override string EntitySetName()
    	{
			return Repository.EntitySetName<Contact, EntityModel.Contact>(false);
    	}

		public override IQueryable<PocoBase> Find()
    	{
			return Repository.Find<Contact, EntityModel.Contact>(SearchOptions, MergeOption.NoTracking).Cast<PocoBase>();
    	}

		public override PocoKey Add()
    	{
			PocoKey key = Repository.Add<Contact, EntityModel.Contact>(this);
			PocoReference<Contact> reference = GetReference(key);
			
			ContactID = (Int32)key.KeyValues.FirstOrDefault(k=> k.Key.Equals(CONTACT_ID)).Value;

			if (Individual != null)
			{
				foreach (Individual individual in Individual)
				{
					if (individual.Contact != null && individual.Contact.ObjectID == ObjectID)
						individual.ContactReference = reference;
				}
			}
			
			if (SalesOrderHeader != null)
			{
				foreach (SalesOrderHeader salesOrderHeader in SalesOrderHeader)
				{
					if (salesOrderHeader.Contact != null && salesOrderHeader.Contact.ObjectID == ObjectID)
						salesOrderHeader.ContactReference = reference;
				}
			}
			
			return key;
    	}
    	
		public override void Update()
    	{
			Repository.Update<Contact, EntityModel.Contact>(this);
    	}
    	
		public override void Delete()
		{
			Repository.Delete<Contact, EntityModel.Contact>(this);
	
			if (Individual != null)
			{
				foreach (Individual individual in Individual)
				{
					if (individual.Contact == this)
					{
						individual.Contact = null;
						individual.ContactReference = null;
					}
				}
			}
	
			if (SalesOrderHeader != null)
			{
				foreach (SalesOrderHeader salesOrderHeader in SalesOrderHeader)
				{
					if (salesOrderHeader.Contact == this)
					{
						salesOrderHeader.Contact = null;
						salesOrderHeader.ContactReference = null;
					}
				}
			}
		}
	}
}