reverts IQuery

src/Umbraco.Core/Persistence/Querying/IQuery.cs

@@ -4,6 +4,28 @@ using System.Linq.Expressions;
 
 namespace Umbraco.Core.Persistence.Querying
 {
+    /// <summary>
+    /// SD: This is a horrible hack but unless we break compatibility with anyone who's actually implemented IQuery{T} there's not much we can do.
+    /// The IQuery{T} interface is useless without having a GetWhereClauses method and cannot be used for tests.
+    /// We have to wait till v8 to make this change I suppose.
+    /// </summary>
+    internal static class QueryExtensions
+    {
+        /// <summary>
+        /// Returns all translated where clauses and their sql parameters
+        /// </summary>
+        /// <returns></returns>
+        public static IEnumerable<Tuple<string, object[]>> GetWhereClauses<T>(this IQuery<T> query)
+        {
+            var q = query as Query<T>;
+            if (q == null)
+            {
+                throw new NotSupportedException(typeof(IQuery<T>) + " cannot be cast to " + typeof(Query<T>));
+            }
+            return q.GetWhereClauses();
+        }
+    }
+
     /// <summary>
     /// Represents a query for building Linq translatable SQL queries
     /// </summary>
@@ -17,10 +39,6 @@ namespace Umbraco.Core.Persistence.Querying
         /// <returns>This instance so calls to this method are chainable</returns>
         IQuery<T> Where(Expression<Func<T, bool>> predicate);
 
-        /// <summary>
-        /// Returns all translated where clauses and their sql parameters
-        /// </summary>
-        /// <returns></returns>
-        IEnumerable<Tuple<string, object[]>> GetWhereClauses();
+        
     }
 }