Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Common/EntitySql/EntitySqlParser.cs

@@ -0,0 +1,71 @@
+//---------------------------------------------------------------------
+// <copyright file="EntitySqlParser.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner  [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+namespace System.Data.Common.EntitySql
+{
+    using System.Collections.Generic;
+    using System.Data.Common.CommandTrees;
+    using System.Data.Common.EntitySql;
+    using System.Data.Common.Utils;
+    using System.Data.Metadata.Edm;
+    using System.Diagnostics;
+
+    /// <summary>
+    /// Public Entity SQL Parser class.
+    /// </summary>
+    public sealed class EntitySqlParser
+    {
+        private readonly Perspective _perspective;
+
+        /// <summary>
+        /// Construct a parser bound to the specified workspace with the specified perspective.
+        /// </summary>
+        internal EntitySqlParser(Perspective perspective)
+        {
+            Debug.Assert(null != perspective, "null perspective?");
+            _perspective = perspective;                
+        }
+
+        /// <summary>
+        /// Parse the specified <paramref name="query"/> with the specified <paramref name="parameters"/>.
+        /// </summary>
+        /// <param name="query">EntitySQL query to be parsed.</param>
+        /// <param name="parameters">optional query parameters</param>
+        /// <returns><see cref="ParseResult"/> containing <see cref="DbCommandTree"/> and information describing inline function definitions if any.</returns>
+        public ParseResult Parse(string query, params DbParameterReferenceExpression[] parameters)
+        {
+            EntityUtil.CheckArgumentNull(query, "query");
+            if (parameters != null)
+            {
+                IEnumerable<DbParameterReferenceExpression> paramsEnum = parameters;
+                EntityUtil.CheckArgumentContainsNull(ref paramsEnum, "parameters");
+            }
+
+            var result = CqlQuery.Compile(query, _perspective, null /* parser options - use default */, parameters);
+            return result;
+        }
+
+        /// <summary>
+        /// Parse a specific query with a specific set variables and produce a <see cref="DbLambda"/>.
+        /// </summary>
+        public DbLambda ParseLambda(string query, params DbVariableReferenceExpression[] variables)
+        {
+            EntityUtil.CheckArgumentNull(query, "query");
+            if (variables != null)
+            {
+                IEnumerable<DbVariableReferenceExpression> varsEnum = variables;
+                EntityUtil.CheckArgumentContainsNull(ref varsEnum, "variables");
+            }
+
+            DbLambda result = CqlQuery.CompileQueryCommandLambda(query, _perspective, null /* parser options - use default */, null /* parameters */, variables);
+
+            return result;
+        }
+    }
+}