/// <summary>
/// Builds an <see cref="EntityQuery"/> tied to a specific <see cref="EntityGroup"/> based on a collection of <see cref="EntityKey"/>s
/// </summary>
/// <param name="keys"></param>
/// <param name="entityQuery"></param>
/// <returns></returns>
private static EntityQuery AddWhereClause(EntityQuery entityQuery, IEnumerable <EntityKey> keys)
{
var lambda = BuildWhereLambda(keys);
return(AddWhereClause(entityQuery, lambda));
}
/// <summary>
/// Projects each element of a sequence into a new form.
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TResult"></typeparam>
/// <param name="source"></param>
/// <param name="selector"></param>
/// <returns></returns>
/// <include file='EntityQueryExtensions.Examples.xml' path='//Class[@name="EntityQueryExtensions"]/method[@name="Select1"]/*' />
public static EntityQuery <TResult> Select <TSource, TResult>(this EntityQuery <TSource> source, Expression <Func <TSource, TResult> > selector)
{
return((EntityQuery <TResult>)Queryable.Select(source, selector));
}
/// <summary>
/// Bypasses a specified number of elements in a sequence and then returns the remaining elements.
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source"></param>
/// <param name="count"></param>
/// <returns></returns>
/// <include file='EntityQueryExtensions.Examples.xml' path='//Class[@name="EntityQueryExtensions"]/method[@name="Skip2"]/*' />
public static EntityQuery <TSource> Skip <TSource>(this EntityQuery <TSource> source, int count)
{
return((EntityQuery <TSource>)Queryable.Skip(source, count));
}
public static EntityQuery <TSource> ThenByDescending <TSource, TKey>(this EntityQuery <TSource> source, Expression <Func <TSource, TKey> > keySelector)
{
return((EntityQuery <TSource>)Queryable.ThenByDescending(source, keySelector));
}
/// <summary>
/// Sorts the elements of a sequence in ascending order.
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <typeparam name="TKey"></typeparam>
/// <param name="source"></param>
/// <param name="keySelector"></param>
/// <returns></returns>
/// <include file='EntityQueryExtensions.Examples.xml' path='//Class[@name="EntityQueryExtensions"]/method[@name="OrderBy"]/*' />
public static EntityQuery <TSource> OrderBy <TSource, TKey>(this EntityQuery <TSource> source, Expression <Func <TSource, TKey> > keySelector)
{
return((EntityQuery <TSource>)Queryable.OrderBy(source, keySelector));
}
/// <summary>
/// Filters a sequence of values based on a predicate.
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source1"></param>
/// <param name="predicate"></param>
/// <returns></returns>
/// <include file='EntityQueryExtensions.Examples.xml' path='//Class[@name="EntityQueryExtensions"]/method[@name="Where1"]/*' />
public static EntityQuery <TSource> Where <TSource>(this EntityQuery <TSource> source1, Expression <Func <TSource, bool> > predicate)
{
return((EntityQuery <TSource>)Queryable.Where(source1, predicate));
}
/// <summary>
/// Returns a specified number of contiguous elements from the start of a sequence.
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source"></param>
/// <param name="count"></param>
/// <returns></returns>
/// <include file='EntityQueryExtensions.Examples.xml' path='//Class[@name="EntityQueryExtensions"]/method[@name="Skip2"]/*' />
public static EntityQuery <TSource> Take <TSource>(this EntityQuery <TSource> source, int count)
{
return((EntityQuery <TSource>)Queryable.Take(source, count));
}
/// <summary>
/// May be called by subclasses that need to add additional behavior to a query.
/// The basic idea is to use this method to clone the query first and then add
/// or modify properties on the cloned instance.
/// </summary>
/// <param name="query"></param>
protected EntityQuery(EntityQuery <T> query) : base(query)
{
DataServiceQuery = query.DataServiceQuery;
}