private string CacheKey(Expression <Func <T, bool> > predicate = null, PagedSpecification <T> paging = null)
{
var identity = new StringBuilder();
if (predicate != null)
{
Expression expression = predicate;
// locally evaluate as much of the query as possible
expression = Evaluator.PartialEval(expression);
// support local collections
expression = LocalCollectionExpander.Rewrite(expression);
identity.Append(expression);
}
else
{
identity.Append("All");
}
if (paging?.PageNumber > 0)
{
identity.AppendFormat("|page:{0}", paging.PageNumber);
}
if (paging?.PageSize > 0)
{
identity.AppendFormat("|size:{0}", paging.PageSize);
}
if (paging?.Sorting != null)
{
identity.AppendFormat("|orderby:{0}", paging.Sorting);
}
var hash = ComputeHash(identity.ToString());
return(string.Concat(typeof(T).FullName, "/", GetGeneration(), "/", hash));
}
public List <T> GetPage(int page, int resultsPerPage, string orderBy, Func <string, Expression <Func <T, object> > > map, bool desc = false, ISpecification <T> spec = null)
{
PagedSpecification <T> spec1 = new PagedSpecification <T>(map);
spec1.ApplyOrderBy(orderBy, desc);
spec1.Apply(page * resultsPerPage, resultsPerPage);
if (spec == null)
{
return(base.GetPage(page, resultsPerPage,
new List <ISort>()
{
SpecificationEvaluator <T, TKey> .GetSort(spec1)
}));
}
else
{
return(base.GetPage(page, resultsPerPage,
new List <ISort>()
{
SpecificationEvaluator <T, TKey> .GetSort(spec1)
},
SpecificationEvaluator <T, TKey> .GetQuery(spec)));
}
}
public IQueryable <T> Build(IRepository repository)
{
IQueryable <T> query;
if (_include != null)
{
var loadService = repository.As <ILoadService <T> >().Include(_include);
query = loadService.All();
}
else
{
query = repository.All <T>();
}
if (_query != null && _pageNumber != 0 && _pageSize != 0)
{
var paging = new PagedSpecification <T>((Specification <T>)_query).Page(_pageNumber, _pageSize);
query = paging.Apply(query);
}
else if (_query != null)
{
query = _query.Apply(query);
}
else if (_pageNumber != 0 && _pageSize != 0)
{
var paging = new PagedSpecification <T>(Specification <T> .AlwaysTrue).Page(_pageNumber, _pageSize);
query = paging.Apply(query);
}
if (_orderBy != null)
{
query = _orderBy.Apply(query);
}
return(query);
}
