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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.DAL.Observables
{
/// <summary>
/// Represents a service responsible for caching the collection all loaded observable entities.
/// </summary>
internal static class LoadedEntitiesService
{
private static List<KeyValuePair<String, IObservableEntity>> LoadedObjects; //Holds the collection of cached entities.
/// <summary>
/// Initializes the <see cref="LoadedEntitiesService"/> class.
/// </summary>
static LoadedEntitiesService()
{
LoadedObjects = new List<KeyValuePair<String, IObservableEntity>>();
}
/// <summary>
/// Gets the loaded entity by the specified entity guid.
/// </summary>
/// <param name="guid">The unique identifier.</param>
/// <returns></returns>
public static Object Get(String guid)
{
return LoadedObjects.SingleOrDefault(x => x.Key == guid).Value;
}
/// <summary>
/// Adds the specified observable entity.
/// </summary>
/// <param name="guid">The unique identifier.</param>
/// <param name="observable">The observable.</param>
public static void Add(String guid, IObservableEntity observable)
{
if (!LoadedObjects.Exists(x => x.Key == guid))
{
LoadedObjects.Add(new KeyValuePair<string, IObservableEntity>(guid, observable));
}
}
/// <summary>
/// Determines whether the specified observable entity is loaded.
/// </summary>
/// <param name="guid">The unique identifier.</param>
/// <returns></returns>
public static bool IsLoaded(String guid)
{
return LoadedObjects.Exists(x => x.Key == guid);
}
/// <summary>
/// Resets the entities cache.
/// </summary>
public static void Reset()
{
LoadedObjects.Clear();
}
}
}
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