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using System.Collections.Generic;
using Marina.DataAccess.Exceptions;
using Marina.Domain.Interfaces;
namespace Marina.DataAccess {
public class IdentityMap< T > : IIdentityMap< T > where T : IDomainObject {
public IdentityMap() {
_items = new List< T >( );
}
public void Add( T domainObject ) {
EnsureObjectHasNotAlreadyBeenAdded( domainObject );
_items.Add( domainObject );
}
public bool ContainsObjectWithIdOf( long idOfObjectToFind ) {
foreach ( T item in _items ) {
if ( item.ID( ).Equals( idOfObjectToFind ) ) {
return true;
}
}
return false;
}
public T FindObjectWithIdOf( long idOfObjectToFind ) {
foreach ( T item in _items ) {
if ( item.ID( ).Equals( idOfObjectToFind ) ) {
return item;
}
}
return default( T );
}
private void EnsureObjectHasNotAlreadyBeenAdded( T domainObject ) {
if ( ContainsObjectWithIdOf( domainObject.ID( ) ) ) {
throw new ObjectAlreadyAddedToIdentityMapException( domainObject );
}
}
private readonly IList< T > _items;
}
}
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