/// <summary>Adds or get the filter context associated with the context.</summary>
/// <param name="context">The context associated with the filter context.</param>
/// <returns>The filter context associated with the context.</returns>
public static QueryFilterContext AddOrGetFilterContext(DbContext context)
{
QueryFilterContext filterContext;
if (!CacheWeakFilterContext.TryGetValue(context, out filterContext))
{
filterContext = new QueryFilterContext(context);
CacheWeakFilterContext.Add(context, filterContext);
}
return(filterContext);
}
/// <summary>Adds or gets the generic filter context associated with the context.</summary>
/// <param name="context">The context associated to the filter context.</param>
/// <returns>The generic filter context associated with the context.</returns>
public static QueryFilterContext AddOrGetGenericFilterContext(DbContext context)
{
var key = context.GetType().FullName;
QueryFilterContext filterContext;
if (!CacheGenericFilterContext.TryGetValue(key, out filterContext))
{
lock (GenericFilterContextLock)
{
if (!CacheGenericFilterContext.TryGetValue(key, out filterContext))
{
filterContext = new QueryFilterContext(context, true);
CacheGenericFilterContext.Add(key, filterContext);
}
}
}
return(filterContext);
}
/// <summary>Makes a deep copy of this filter.</summary>
/// <param name="filterContext">The filter context that owns the filter copy.</param>
/// <returns>A copy of this filter.</returns>
public override BaseQueryFilter Clone(QueryFilterContext filterContext)
{
return(new QueryFilter <T>(filterContext, Filter));
}
/// <summary>Constructor.</summary>
/// <param name="ownerFilterContext">The context that owns his filter.</param>
/// <param name="filter">The filter.</param>
public QueryFilter(QueryFilterContext ownerFilterContext, Func <IQueryable <T>, IQueryable <T> > filter)
{
ElementType = typeof(T);
Filter = filter;
OwnerFilterContext = ownerFilterContext;
}
/// <summary>Makes a deep copy of this filter.</summary>
/// <param name="filterContext">The filter context that owns the filter copy.</param>
/// <returns>A copy of this filter.</returns>
public virtual BaseQueryFilter Clone(QueryFilterContext filterContext)
{
throw new Exception(ExceptionMessage.GeneralException);
}
/// <summary>Create a new QueryFilter.</summary>
/// <param name="ownerFilterContext">The context that owns his filter.</param>
/// <param name="predicate">The filter delegate.</param>
public QueryFilter(QueryFilterContext ownerFilterContext, Func <IQueryable <T>, IQueryable <T> > predicate)
{
ElementType = typeof(T);
OwnerFilterContext = ownerFilterContext;
Predicate = predicate;
}
