Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Metadata/Edm/FunctionParameter.cs

@@ -0,0 +1,142 @@
+//---------------------------------------------------------------------
+// <copyright file="FunctionParameter.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+
+namespace System.Data.Metadata.Edm
+{
+    /// <summary>
+    /// Class representing a function parameter
+    /// </summary>
+    public sealed class FunctionParameter : MetadataItem
+    {
+        internal static Func<FunctionParameter, SafeLink<EdmFunction>> DeclaringFunctionLinker = fp => fp._declaringFunction;
+        
+        #region Constructors
+        /// <summary>
+        /// The constructor for FunctionParameter taking in a name and a TypeUsage object
+        /// </summary>
+        /// <param name="name">The name of this FunctionParameter</param>
+        /// <param name="typeUsage">The TypeUsage describing the type of this FunctionParameter</param>
+        /// <param name="parameterMode">Mode of the parameter</param>
+        /// <exception cref="System.ArgumentNullException">Thrown if name or typeUsage arguments are null</exception>
+        /// <exception cref="System.ArgumentException">Thrown if name argument is empty string</exception>
+        internal FunctionParameter(string name, TypeUsage typeUsage, ParameterMode parameterMode)
+        {
+            EntityUtil.CheckStringArgument(name, "name");
+            EntityUtil.GenericCheckArgumentNull(typeUsage, "typeUsage");
+            _name = name;            
+            _typeUsage = typeUsage;
+            SetParameterMode(parameterMode);
+        }
+        #endregion
+
+        #region Fields
+        private readonly TypeUsage _typeUsage;
+        private readonly string _name;
+        private readonly SafeLink<EdmFunction> _declaringFunction = new SafeLink<EdmFunction>();
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// Returns the kind of the type
+        /// </summary>
+        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.FunctionParameter; } }
+
+        /// <summary>
+        /// Gets/Sets the mode of this parameter
+        /// </summary>
+        /// <exception cref="System.ArgumentNullException">Thrown if value passed into setter is null</exception>
+        /// <exception cref="System.InvalidOperationException">Thrown if the FunctionParameter instance is in ReadOnly state</exception>
+        [MetadataProperty(BuiltInTypeKind.ParameterMode, false)]
+        public ParameterMode Mode
+        {
+            get
+            {
+                return GetParameterMode();
+            }
+        }
+
+        /// <summary>
+        /// Returns the identity of the member
+        /// </summary>
+        internal override string Identity
+        {
+            get
+            {
+                return _name;
+            }
+        }
+
+        /// <summary>
+        /// Returns the name of the member
+        /// </summary>
+        [MetadataProperty(PrimitiveTypeKind.String, false)]
+        public String Name
+        {
+            get
+            {
+                return _name;
+            }
+        }
+
+        /// <summary>
+        /// Returns the TypeUsage object containing the type information and facets
+        /// about the type
+        /// </summary>
+        [MetadataProperty(BuiltInTypeKind.TypeUsage, false)]
+        public TypeUsage TypeUsage
+        {
+            get
+            {
+                return _typeUsage;
+            }
+        }
+
+        /// <summary>
+        /// Returns the declaring function of this parameter
+        /// </summary>
+        public EdmFunction DeclaringFunction
+        {
+            get
+            {
+                return _declaringFunction.Value;
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// Overriding System.Object.ToString to provide better String representation 
+        /// for this type.
+        /// </summary>
+        public override string ToString()
+        {
+            return Name;
+        }
+
+
+        /// <summary>
+        /// Sets the member to read only mode. Once this is done, there are no changes
+        /// that can be done to this class
+        /// </summary>
+        internal override void SetReadOnly()
+        {
+            if (!IsReadOnly)
+            {
+                base.SetReadOnly();
+                // TypeUsage is always readonly, no reason to set it
+            }
+        }
+        #endregion
+    }
+}