internal static MethodCallExpression MakeTake(Type entityType, ISpListItemsProvider listItemsProvider,
QueryModel queryModel)
{
return(Expression.Call(MethodUtils.SpqTake.MakeGenericMethod(entityType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider)),
Expression.Constant(queryModel, typeof(QueryModel))));
}
internal static TResult First <TSource, TResult>(ISpListItemsProvider listItemsProvider, QueryModel queryModel,
bool throwIfNothing, bool throwIfMultiple, Func <TSource, TResult> selector)
{
var item = First <TSource>(listItemsProvider, queryModel, throwIfNothing, throwIfMultiple);
return(item == null ? default(TResult) : selector(item));
}
internal static MethodCallExpression MakeSelect(Type contentType, Type resulType,
ISpListItemsProvider listItemsProvider, QueryModel queryModel, LambdaExpression selector)
{
return(Expression.Call(MethodUtils.SpqSelect.MakeGenericMethod(contentType, resulType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider)),
Expression.Constant(queryModel, typeof(QueryModel)),
Expression.Constant(selector.Compile())));
}
internal static MethodCallExpression MakeElementAt(Type entityType, ISpListItemsProvider listItemsProvider,
QueryModel queryModel, int index, bool throwIfNothing)
{
return(Expression.Call(MethodUtils.SpqElementAt.MakeGenericMethod(entityType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider)),
Expression.Constant(queryModel, typeof(QueryModel)),
Expression.Constant(index),
Expression.Constant(throwIfNothing)));
}
internal static MethodCallExpression MakeFirst(Type entityType, ISpListItemsProvider listItemsProvider,
QueryModel queryModel, bool throwIfNothing, bool throwIfMultiple)
{
return(Expression.Call(MethodUtils.SpqFirst.MakeGenericMethod(entityType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider)),
Expression.Constant(queryModel, typeof(QueryModel)),
Expression.Constant(throwIfNothing),
Expression.Constant(throwIfMultiple)));
}
internal static MethodCallExpression MakeElementAt(Type entityType, Type projectionType,
ISpListItemsProvider listItemsProvider, QueryModel queryModel, int index, bool throwIfNothing,
LambdaExpression selector)
{
return(Expression.Call(MethodUtils.SpqElementAtP.MakeGenericMethod(entityType, projectionType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider)),
Expression.Constant(queryModel, typeof(QueryModel)),
Expression.Constant(index),
Expression.Constant(throwIfNothing),
Expression.Constant(selector.Compile())));
}
internal static T ElementAt <T>(ISpListItemsProvider listItemsProvider, QueryModel queryModel, int index,
bool throwIfNothing)
{
var item = listItemsProvider.ElementAtOrDefault <T>(queryModel, index);
if (throwIfNothing && item == null)
{
throw Error.NoMatch();
}
return(item);
}
internal static TResult ElementAt <TSource, TResult>(ISpListItemsProvider listItemsProvider,
QueryModel queryModel,
int index, bool throwIfNothing, Func <TSource, TResult> selector)
{
var item = ElementAt <TSource>(listItemsProvider, queryModel, index, throwIfNothing);
if (item == null)
{
return(default(TResult));
}
return(selector(item));
}
internal static T First <T>(ISpListItemsProvider listItemsProvider, QueryModel queryModel, bool throwIfNothing,
bool throwIfMultiple)
{
var item = throwIfMultiple
? listItemsProvider.SingleOrDefault <T>(queryModel)
: listItemsProvider.FirstOrDefault <T>(queryModel);
if (throwIfNothing && item == null)
{
throw Error.NoMatch();
}
return(item);
}
internal static MethodCallExpression MakeFakeFetch(Type entityType, ISpListItemsProvider listItemsProvider)
{
return(Expression.Call(MethodUtils.SpqFakeFetch.MakeGenericMethod(entityType),
Expression.Constant(listItemsProvider, typeof(ISpListItemsProvider))));
}
internal static IEnumerable <TResult> Take <TSoure, TResult>(ISpListItemsProvider listItemsProvider,
QueryModel queryModel, Func <TSoure, TResult> selector)
{
return(Fetch <TSoure>(listItemsProvider, queryModel).Select(selector));
}
internal static IQueryable <T> FakeFetch <T>(ISpListItemsProvider listItemsProvider)
{
throw new NotImplementedException("If you see that exception it means that expression tree rewrite failed");
}
internal static IEnumerable <T> Take <T>(ISpListItemsProvider listItemsProvider, QueryModel queryModel)
{
return(Fetch <T>(listItemsProvider, queryModel));
}
internal static TSource Max <TSource>(ISpListItemsProvider listItemsProvider, QueryModel queryModel)
{
return(listItemsProvider.Fetch <TSource>(queryModel)
.Max());
}
internal static TResult Max <TSource, TResult>(ISpListItemsProvider listItemsProvider,
QueryModel queryModel, Func <TSource, TResult> selector)
{
return(listItemsProvider.Fetch <TSource>(queryModel)
.Max(selector));
}
internal static int Count <T>(ISpListItemsProvider listItemsProvider, QueryModel queryModel)
{
return(listItemsProvider.Count <T>(queryModel));
}
private static Expression MakeFakeFetch(ISpListItemsProvider listItemsProvider)
{
Guard.CheckNotNull(nameof(listItemsProvider), listItemsProvider);
return(SpQueryable.MakeFakeFetch(typeof(T), listItemsProvider));
}
internal static bool NotAny <T>(ISpListItemsProvider listItemsProvider, QueryModel queryModel)
{
queryModel.RowLimit = 1;
return(!listItemsProvider.Any <T>(queryModel));
}
public SpList(ISpListItemsProvider listItemsProvider)
: base(MakeFakeFetch(listItemsProvider))
{
ListItemsProvider = listItemsProvider;
}
