OData#1645 okay this is the easy part, now I get to hunt down where t…

…he injection occurs

src/Microsoft.AspNet.OData.Shared/Query/ODataQueryOptions.cs

@@ -30,6 +30,7 @@ namespace Microsoft.AspNet.OData.Query
     [ODataQueryParameterBinding]
     [SuppressMessage("Microsoft.Maintainability", "CA1506:AvoidExcessiveClassCoupling", Justification = "Relies on many ODataLib classes.")]
     public partial class ODataQueryOptions
+        : IODataQueryOptions
     {
         private static readonly MethodInfo _limitResultsGenericMethod = typeof(ODataQueryOptions).GetMethods(BindingFlags.Public | BindingFlags.Static)
             .Single(mi => mi.Name == "LimitResults" && mi.ContainsGenericParameters && mi.GetParameters().Length == 4);

src/Microsoft.AspNet.OData.Shared/Query/ODataQueryOptionsOfTEntity.cs

@@ -5,6 +5,7 @@
 using System.Net.Http.Headers;
 using Microsoft.AspNet.OData.Common;
 using Microsoft.AspNet.OData.Formatter;
+using Microsoft.AspNet.OData.Interfaces;
 
 namespace Microsoft.AspNet.OData.Query
 {
@@ -13,7 +14,9 @@ namespace Microsoft.AspNet.OData.Query
     /// Currently this only supports $filter, $orderby, $top, $skip.
     /// </summary>
     [ODataQueryParameterBinding]
-    public partial class ODataQueryOptions<TEntity> : ODataQueryOptions
+    public partial class ODataQueryOptions<TEntity> 
+        : ODataQueryOptions
+        , IODataQueryOptions<TEntity>
     {
         /// <summary>
         /// Gets the <see cref="ETag{TEntity}"/> from IfMatch header.

src/Microsoft.AspNetCore.OData/Interfaces/IODataQueryOptions.cs

@@ -0,0 +1,149 @@
+using Microsoft.AspNet.OData.Formatter;
+using Microsoft.AspNet.OData.Query;
+using Microsoft.AspNet.OData.Query.Validators;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+
+namespace Microsoft.AspNet.OData.Interfaces
+{
+    /// <summary>
+    /// This defines a composite OData query options that can be used to perform query composition.
+    /// Currently this only supports $filter, $orderby, $top, $skip, and $count.
+    /// </summary>
+    public interface IODataQueryOptions
+    {
+        /// <summary>
+        ///  Gets the given <see cref="ODataQueryContext"/>
+        /// </summary>
+        ODataQueryContext Context { get; }
+        /// <summary>
+        /// Gets the raw string of all the OData query options
+        /// </summary>
+        ODataRawQueryOptions RawValues { get; }
+        /// <summary>
+        /// Gets the <see cref="SelectExpandQueryOption"/>.
+        /// </summary>
+        SelectExpandQueryOption SelectExpand { get; }
+        /// <summary>
+        /// Gets the <see cref="ApplyQueryOption"/>.
+        /// </summary>
+        ApplyQueryOption Apply { get; }
+        /// <summary>
+        /// Gets the <see cref="FilterQueryOption"/>.
+        /// </summary>
+        FilterQueryOption Filter { get; }
+        /// <summary>
+        /// Gets the <see cref="OrderByQueryOption"/>.
+        /// </summary>
+        OrderByQueryOption OrderBy { get; }
+        /// <summary>
+        /// Gets the <see cref="SkipQueryOption"/>.
+        /// </summary>
+         SkipQueryOption Skip { get; }
+
+        /// <summary>
+        /// Gets the <see cref="SkipTokenQueryOption"/>.
+        /// </summary>
+         SkipTokenQueryOption SkipToken { get; }
+
+        /// <summary>
+        /// Gets the <see cref="TopQueryOption"/>.
+        /// </summary>
+         TopQueryOption Top { get; }
+
+        /// <summary>
+        /// Gets the <see cref="CountQueryOption"/>.
+        /// </summary>
+         CountQueryOption Count { get; }
+
+        /// <summary>
+        /// Gets or sets the query validator.
+        /// </summary>
+         ODataQueryValidator Validator { get; set; }
+
+        /// <summary>
+        /// Gets the <see cref="ETag"/> from IfMatch header.
+        /// </summary>
+        ETag IfMatch { get; }
+
+        /// <summary>
+        /// Gets the <see cref="ETag"/> from IfNoneMatch header.
+        /// </summary>
+        ETag IfNoneMatch { get; }
+
+        /// <summary>
+        /// Apply the individual query to the given IQueryable in the right order.
+        /// </summary>
+        /// <param name="query">The original <see cref="IQueryable"/>.</param>
+        /// <returns>The new <see cref="IQueryable"/> after the query has been applied to.</returns>
+        IQueryable ApplyTo(IQueryable query);
+
+        /// <summary>
+        /// Apply the individual query to the given IQueryable in the right order.
+        /// </summary>
+        /// <param name="query">The original <see cref="IQueryable"/>.</param>
+        /// <param name="ignoreQueryOptions">The query parameters that are already applied in queries.</param>
+        /// <returns>The new <see cref="IQueryable"/> after the query has been applied to.</returns>
+        IQueryable ApplyTo(IQueryable query, AllowedQueryOptions ignoreQueryOptions);
+
+        /// <summary>
+        /// Apply the individual query to the given IQueryable in the right order.
+        /// </summary>
+        /// <param name="query">The original <see cref="IQueryable"/>.</param>
+        /// <param name="querySettings">The settings to use in query composition.</param>
+        /// <param name="ignoreQueryOptions">The query parameters that are already applied in queries.</param>
+        /// <returns>The new <see cref="IQueryable"/> after the query has been applied to.</returns>
+        IQueryable ApplyTo(IQueryable query, ODataQuerySettings querySettings, AllowedQueryOptions ignoreQueryOptions);
+
+        /// <summary>
+        /// Apply the individual query to the given IQueryable in the right order.
+        /// </summary>
+        /// <param name="query">The original <see cref="IQueryable"/>.</param>
+        /// <param name="querySettings">The settings to use in query composition.</param>
+        /// <returns>The new <see cref="IQueryable"/> after the query has been applied to.</returns>
+        [SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity", Justification = "These are simple conversion function and cannot be split up.")]
+        IQueryable ApplyTo(IQueryable query, ODataQuerySettings querySettings);
+
+        /// <summary>
+        /// Apply the individual query to the given IQueryable in the right order.
+        /// </summary>
+        /// <param name="entity">The original entity.</param>
+        /// <param name="querySettings">The <see cref="ODataQuerySettings"/> that contains all the query application related settings.</param>
+        /// <param name="ignoreQueryOptions">The query parameters that are already applied in queries.</param>
+        /// <returns>The new entity after the $select and $expand query has been applied to.</returns>
+        /// <remarks>Only $select and $expand query options can be applied on single entities. This method throws if the query contains any other
+        /// query options.</remarks>
+        object ApplyTo(object entity, ODataQuerySettings querySettings, AllowedQueryOptions ignoreQueryOptions);
+
+        /// <summary>
+        /// Applies the query to the given entity using the given <see cref="ODataQuerySettings"/>.
+        /// </summary>
+        /// <param name="entity">The original entity.</param>
+        /// <param name="querySettings">The <see cref="ODataQuerySettings"/> that contains all the query application related settings.</param>
+        /// <returns>The new entity after the $select and $expand query has been applied to.</returns>
+        /// <remarks>Only $select and $expand query options can be applied on single entities. This method throws if the query contains any other
+        /// query options.</remarks>
+        object ApplyTo(object entity, ODataQuerySettings querySettings);
+
+        /// <summary>
+        /// Generates the Stable OrderBy query option based on the existing OrderBy and other query options. 
+        /// </summary>
+        /// <returns>An order by query option that ensures stable ordering of the results.</returns>
+        OrderByQueryOption GenerateStableOrder();
+
+        /// <summary>
+        /// Check if the given query option is the supported query option.
+        /// </summary>
+        /// <param name="queryOptionName">The name of the query option.</param>
+        /// <returns>Returns <c>true</c> if the query option is the supported query option.</returns>
+        [SuppressMessage("Microsoft.Globalization", "CA1308:NormalizeStringsToUppercase", Justification = "Need lower case string here.")]
+        bool IsSupportedQueryOption(string queryOptionName);
+
+        /// <summary>
+        /// Validate all OData queries, including $skip, $top, $orderby and $filter, based on the given <paramref name="validationSettings"/>.
+        /// It throws an ODataException if validation failed.
+        /// </summary>
+        /// <param name="validationSettings">The <see cref="ODataValidationSettings"/> instance which contains all the validation settings.</param>
+        void Validate(ODataValidationSettings validationSettings);
+    }
+}

src/Microsoft.AspNetCore.OData/Interfaces/IODataQueryOptionsOfTEntity.cs

@@ -0,0 +1,25 @@
+using Microsoft.AspNet.OData.Formatter;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Microsoft.AspNet.OData.Interfaces
+{
+    /// <summary>
+    /// This defines a composite OData query options that can be used to perform query composition.
+    /// Currently this only supports $filter, $orderby, $top, $skip.
+    /// </summary>
+    public interface IODataQueryOptions<TEntity>
+        : IODataQueryOptions
+    {
+        /// <summary>
+        /// Gets the <see cref="ETag{TEntity}"/> from IfMatch header.
+        /// </summary>
+        new ETag<TEntity> IfMatch { get; }
+
+        /// <summary>
+        /// Gets the <see cref="ETag{TEntity}"/> from IfNoneMatch header.
+        /// </summary>
+        new ETag<TEntity> IfNoneMatch { get; }
+    }
+}