Improve $count in $filter collection properties

src/Microsoft.OData.Client/Microsoft.OData.Client.csproj

@@ -96,6 +96,7 @@
     <Compile Include="..\Microsoft.OData.Core\UriParser\Aggregation\EntitySetAggregateToken.cs" Link="ALinq\UriParser\Aggregation\EntitySetAggregateToken.cs" />
     <Compile Include="..\Microsoft.OData.Core\UriParser\Aggregation\AggregateTokenBase.cs" Link="ALinq\UriParser\Aggregation\AggregateTokenBase.cs" />
     <Compile Include="..\Microsoft.OData.Core\UriParser\Aggregation\AggregateExpressionToken.cs" Link="ALinq\UriParser\Aggregation\AggregateExpressionToken.cs" />
+    <Compile Include="..\Microsoft.OData.Core\UriParser\SyntacticAst\CountSegmentToken.cs" Link="ALinq\UriParser\SyntacticAst\CountSegmentToken.cs" />
   </ItemGroup>
 
   <ItemGroup>

src/Microsoft.OData.Core/GlobalSuppressions.cs

@@ -52,5 +52,6 @@
 [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily", Scope = "member", Target = "Microsoft.OData.UriParser.InnerPathTokenBinder.#BindInnerPathSegment(Microsoft.OData.UriParser.InnerPathToken)")]
 [assembly: SuppressMessage("Microsoft.Globalization", "CA1305:SpecifyIFormatProvider", MessageId = "System.String.Format(System.String,System.Object[])", Scope = "member", Target = "Microsoft.OData.PropertyCacheHandler.#GetProperty(System.String,Microsoft.OData.Edm.IEdmStructuredType)")]
 [assembly: SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Utils", Scope = "type", Target = "Microsoft.OData.Buffers.BufferUtils")]
+[assembly: SuppressMessage("Microsoft.Globalization", "CA1308:NormalizeStringsToUppercase", Scope = "member", Target = "Microsoft.OData.UriParser.CountSegmentParser.#CreateCountSegmentToken(Microsoft.OData.UriParser.QueryToken)")]
 [assembly: SuppressMessage("Microsoft.Globalization", "CA1308:NormalizeStringsToUppercase", Scope = "member", Target = "Microsoft.OData.UriParser.SelectExpandOptionParser.#BuildSelectTermToken(Microsoft.OData.UriParser.PathSegmentToken,System.String)")]
 

src/Microsoft.OData.Core/Microsoft.OData.Core.cs

@@ -600,6 +600,7 @@ internal sealed class TextRes {
         internal const string UriQueryExpressionParser_OpenParenExpected = "UriQueryExpressionParser_OpenParenExpected";
         internal const string UriQueryExpressionParser_CloseParenOrCommaExpected = "UriQueryExpressionParser_CloseParenOrCommaExpected";
         internal const string UriQueryExpressionParser_CloseParenOrOperatorExpected = "UriQueryExpressionParser_CloseParenOrOperatorExpected";
+        internal const string UriQueryExpressionParser_IllegalQueryOptioninDollarCount = "UriQueryExpressionParser_IllegalQueryOptioninDollarCount";
         internal const string UriQueryExpressionParser_CannotCreateStarTokenFromNonStar = "UriQueryExpressionParser_CannotCreateStarTokenFromNonStar";
         internal const string UriQueryExpressionParser_RangeVariableAlreadyDeclared = "UriQueryExpressionParser_RangeVariableAlreadyDeclared";
         internal const string UriQueryExpressionParser_AsExpected = "UriQueryExpressionParser_AsExpected";
@@ -632,6 +633,7 @@ internal sealed class TextRes {
         internal const string MetadataBinder_LeftOperandNotSingleValue = "MetadataBinder_LeftOperandNotSingleValue";
         internal const string MetadataBinder_RightOperandNotCollectionValue = "MetadataBinder_RightOperandNotCollectionValue";
         internal const string MetadataBinder_PropertyAccessSourceNotSingleValue = "MetadataBinder_PropertyAccessSourceNotSingleValue";
+        internal const string MetadataBinder_CountSegmentNextTokenNotCollectionValue = "MetadataBinder_CountSegmentNextTokenNotCollectionValue";
         internal const string MetadataBinder_IncompatibleOperandsError = "MetadataBinder_IncompatibleOperandsError";
         internal const string MetadataBinder_IncompatibleOperandError = "MetadataBinder_IncompatibleOperandError";
         internal const string MetadataBinder_UnknownFunction = "MetadataBinder_UnknownFunction";
@@ -711,6 +713,7 @@ internal sealed class TextRes {
         internal const string UriSelectParser_InvalidLevelsOption = "UriSelectParser_InvalidLevelsOption";
         internal const string UriSelectParser_SystemTokenInSelectExpand = "UriSelectParser_SystemTokenInSelectExpand";
         internal const string UriParser_MissingExpandOption = "UriParser_MissingExpandOption";
+        internal const string UriParser_EmptyParenthesis = "UriParser_EmptyParenthesis";
         internal const string UriParser_MissingSelectOption = "UriParser_MissingSelectOption";
         internal const string UriParser_RelativeUriMustBeRelative = "UriParser_RelativeUriMustBeRelative";
         internal const string UriParser_NeedServiceRootForThisOverload = "UriParser_NeedServiceRootForThisOverload";

src/Microsoft.OData.Core/Microsoft.OData.Core.txt

@@ -692,6 +692,7 @@ UriQueryExpressionParser_ExpressionExpected=Expression expected at position {0}
 UriQueryExpressionParser_OpenParenExpected='(' expected at position {0} in '{1}'.
 UriQueryExpressionParser_CloseParenOrCommaExpected=')' or ',' expected at position {0} in '{1}'.
 UriQueryExpressionParser_CloseParenOrOperatorExpected=')' or operator expected at position {0} in '{1}'.
+UriQueryExpressionParser_IllegalQueryOptioninDollarCount=Only $filter and $search query options are allowed within $count.
 UriQueryExpressionParser_CannotCreateStarTokenFromNonStar=Expecting a Star token but got: '{0}'.
 UriQueryExpressionParser_RangeVariableAlreadyDeclared=The range variable '{0}' has already been declared.
 UriQueryExpressionParser_AsExpected='as' expected at position {0} in '{1}'.
@@ -728,6 +729,7 @@ MetadataBinder_UnaryOperatorOperandNotSingleValue=The operand for a unary operat
 MetadataBinder_LeftOperandNotSingleValue=The left operand for the IN operation is not a single value. IN operations require the left operand to be a single value and the right operand to be a collection value.
 MetadataBinder_RightOperandNotCollectionValue=The right operand for the IN operation is not a collection value. IN operations require the left operand to be a single value and the right operand to be a collection value.
 MetadataBinder_PropertyAccessSourceNotSingleValue=The parent value for a property access of a property '{0}' is not a single value. Property access can only be applied to a single value.
+MetadataBinder_CountSegmentNextTokenNotCollectionValue=The next token in a CountSegmentNode must be a collection.
 MetadataBinder_IncompatibleOperandsError=A binary operator with incompatible types was detected. Found operand types '{0}' and '{1}' for operator kind '{2}'.
 MetadataBinder_IncompatibleOperandError=A unary operator with an incompatible type was detected. Found operand type '{0}' for operator kind '{1}'.
 MetadataBinder_UnknownFunction=An unknown function with name '{0}' was found. This may also be a function import or a key lookup on a navigation property, which is not allowed.
@@ -819,6 +821,7 @@ UriSelectParser_InvalidCountOption=Count option must be a boolean value, it is s
 UriSelectParser_InvalidLevelsOption=Levels option must be a non-negative integer or 'max', it is set to '{0}' instead.
 UriSelectParser_SystemTokenInSelectExpand=Found system token '{0}' in select or expand clause '{1}'.
 UriParser_MissingExpandOption=Missing expand option on navigation property '{0}'. If a parenthesis expression follows an expanded navigation property, then at least one expand option must be provided.
+UriParser_EmptyParenthesis=Empty parenthesis not allowed.
 UriParser_MissingSelectOption=Missing select option on property '{0}'. If a parenthesis expression follows a selected property, then at least one query option must be provided.
 UriParser_RelativeUriMustBeRelative=Parameter 'relativeUri' must be a relative Uri if serviceRoot is not specified.
 UriParser_NeedServiceRootForThisOverload=A service root URI must be provided to the ODataUriParser in order to use this method.

src/Microsoft.OData.Core/Parameterized.Microsoft.OData.Core.cs

@@ -5212,6 +5212,14 @@ internal static string UriQueryExpressionParser_CloseParenOrOperatorExpected(obj
             return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.UriQueryExpressionParser_CloseParenOrOperatorExpected, p0, p1);
         }
 
+        /// <summary>
+        /// A string like "Only $filter and $search query options are allowed within $count."
+        /// </summary>
+        internal static string UriQueryExpressionParser_IllegalQueryOptioninDollarCount()
+        {
+            return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.UriQueryExpressionParser_IllegalQueryOptioninDollarCount);
+        }
+
         /// <summary>
         /// A string like "Expecting a Star token but got: '{0}'."
         /// </summary>
@@ -5495,6 +5503,14 @@ internal static string MetadataBinder_PropertyAccessSourceNotSingleValue(object
             return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.MetadataBinder_PropertyAccessSourceNotSingleValue, p0);
         }
 
+        /// <summary>
+        /// A string like "The next token in a CountSegmentNode must be a collection."
+        /// </summary>
+        internal static string MetadataBinder_CountSegmentNextTokenNotCollectionValue()
+        {
+            return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.MetadataBinder_CountSegmentNextTokenNotCollectionValue);
+        }
+
         /// <summary>
         /// A string like "A binary operator with incompatible types was detected. Found operand types '{0}' and '{1}' for operator kind '{2}'."
         /// </summary>
@@ -6196,6 +6212,14 @@ internal static string UriParser_MissingExpandOption(object p0)
             return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.UriParser_MissingExpandOption, p0);
         }
 
+        /// <summary>
+        /// A string like "Empty parenthesis not allowed."
+        /// </summary>
+        internal static string UriParser_EmptyParenthesis()
+        {
+            return Microsoft.OData.TextRes.GetString(Microsoft.OData.TextRes.UriParser_EmptyParenthesis);
+        }
+
         /// <summary>
         /// A string like "Missing select option on property '{0}'. If a parenthesis expression follows a selected property, then at least one query option must be provided."
         /// </summary>

src/Microsoft.OData.Core/UriParser/Binders/CountSegmentBinder.cs

@@ -0,0 +1,77 @@
+//---------------------------------------------------------------------
+// <copyright file="CountSegmentBinder.cs" company="Microsoft">
+//      Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+// </copyright>
+//---------------------------------------------------------------------
+
+namespace Microsoft.OData.UriParser
+{
+    using ODataErrorStrings = Microsoft.OData.Strings;
+
+    /// <summary>
+    /// Class that knows how to bind a Count segment token.
+    /// </summary>
+    internal sealed class CountSegmentBinder
+    {
+        /// <summary>
+        /// Method to use to visit the token tree and bind the tokens recursively.
+        /// </summary>
+        private readonly MetadataBinder.QueryTokenVisitor bindMethod;
+
+        /// <summary>
+        /// State to use for binding.
+        /// </summary>
+        private readonly BindingState state;
+
+        /// <summary>
+        /// Constructs a CountSegmentBinder object.
+        /// </summary>
+        /// <param name="bindMethod">Method to use to visit the token tree and bind the tokens recursively.</param>
+        /// <param name="state">State of the metadata binding.</param>
+        internal CountSegmentBinder(MetadataBinder.QueryTokenVisitor bindMethod, BindingState state)
+        {
+            this.bindMethod = bindMethod;
+            this.state = state;
+        }
+
+        /// <summary>
+        /// Binds an Count segment token.
+        /// </summary>
+        /// <param name="countSegmentToken">The Count segment token to bind.</param>
+        /// <param name="state">State of the metadata binding.</param>
+        /// <returns>The bound Count segment token.</returns>
+        internal QueryNode BindCountSegment(CountSegmentToken countSegmentToken)
+        {
+            ExceptionUtils.CheckArgumentNotNull(countSegmentToken, "countSegmentToken");
+
+            QueryNode source = this.bindMethod(countSegmentToken.NextToken);
+            CollectionNode node = source as CollectionNode;
+
+            if(node == null)
+            {
+                throw new ODataException(ODataErrorStrings.MetadataBinder_CountSegmentNextTokenNotCollectionValue());
+            }
+
+            FilterClause filterClause = null;
+            SearchClause searchClause = null;
+
+            BindingState innerBindingState = new BindingState(state.Configuration);            
+            innerBindingState.ImplicitRangeVariable = NodeFactory.CreateParameterNode(ExpressionConstants.It, node);
+            MetadataBinder binder = new MetadataBinder(innerBindingState);
+
+            if (countSegmentToken.FilterOption != null)
+            {
+                FilterBinder filterBinder = new FilterBinder(binder.Bind, innerBindingState);
+                filterClause = filterBinder.BindFilter(countSegmentToken.FilterOption);
+            }
+
+            if(countSegmentToken.SearchOption != null)
+            {
+                SearchBinder searchBinder = new SearchBinder(binder.Bind);
+                searchClause = searchBinder.BindSearch(countSegmentToken.SearchOption);
+            }
+
+            return new CountNode(node, filterClause, searchClause);
+        }
+    }
+}

src/Microsoft.OData.Core/UriParser/Binders/MetadataBinder.cs

@@ -198,6 +198,9 @@ protected internal QueryNode Bind(QueryToken token)
                 case QueryTokenKind.In:
                     result = this.BindIn((InToken)token);
                     break;
+                case QueryTokenKind.CountSegment:
+                    result = this.BindCountSegment((CountSegmentToken)token);
+                    break;
                 default:
                     throw new ODataException(ODataErrorStrings.MetadataBinder_UnsupportedQueryTokenKind(token.Kind));
             }
@@ -370,5 +373,16 @@ protected virtual QueryNode BindIn(InToken inToken)
             InBinder inBinder = new InBinder(InBinderMethod);
             return inBinder.BindInOperator(inToken, this.BindingState);
         }
+
+        /// <summary>
+        /// Binds a CountSegment token.
+        /// </summary>
+        /// <param name="countSegmentToken">The CountSegment token to bind.</param>
+        /// <returns>The bound CountSegment token.</returns>
+        protected virtual QueryNode BindCountSegment(CountSegmentToken countSegmentToken)
+        {
+            CountSegmentBinder countSegmentBinder = new CountSegmentBinder(this.Bind, this.BindingState);
+            return countSegmentBinder.BindCountSegment(countSegmentToken);
+        }
     }
 }

src/Microsoft.OData.Core/UriParser/ODataQueryOptionParser.cs

@@ -384,7 +384,7 @@ private FilterClause ParseFilterImplementation(string filter, ODataUriParserConf
             ExceptionUtils.CheckArgumentNotNull(filter, "filter");
 
             // Get the syntactic representation of the filter expression
-            UriQueryExpressionParser expressionParser = new UriQueryExpressionParser(configuration.Settings.FilterLimit, configuration.EnableCaseInsensitiveUriFunctionIdentifier);
+            UriQueryExpressionParser expressionParser = new UriQueryExpressionParser(configuration.Settings.FilterLimit, configuration.EnableCaseInsensitiveUriFunctionIdentifier, configuration.Resolver.EnableNoDollarQueryOptions);
             QueryToken filterToken = expressionParser.ParseFilter(filter);
 
             // Bind it to metadata