Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Mapping/StorageEntitySetMapping.cs

@@ -0,0 +1,154 @@
+//---------------------------------------------------------------------
+// <copyright file="StorageEntitySetMapping.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Text;
+using System.Data.Metadata.Edm;
+using System.Diagnostics;
+
+namespace System.Data.Mapping {
+    /// <summary>
+    /// Represents the Mapping metadata for an EnitytSet in CS space.
+    /// </summary>
+    /// <example>
+    /// For Example if conceptually you could represent the CS MSL file as following
+    /// --Mapping 
+    ///   --EntityContainerMapping ( CNorthwind-->SNorthwind )
+    ///     --EntitySetMapping
+    ///       --EntityTypeMapping
+    ///         --MappingFragment
+    ///       --EntityTypeMapping
+    ///         --MappingFragment
+    ///     --AssociationSetMapping 
+    ///       --AssociationTypeMapping
+    ///         --MappingFragment
+    /// This class represents the metadata for the EntitySetMapping elements in the
+    /// above example. And it is possible to access the EntityTypeMaps underneath it.
+    /// </example>
+    internal class StorageEntitySetMapping : StorageSetMapping {
+        #region Constructors
+        /// <summary>
+        /// Construct a EntitySet mapping object
+        /// </summary>
+        /// <param name="extent">EntitySet metadata object</param>
+        /// <param name="entityContainerMapping">The entity Container Mapping that contains this Set mapping</param>
+        internal StorageEntitySetMapping(EntitySet extent, StorageEntityContainerMapping entityContainerMapping)
+            : base(extent, entityContainerMapping) {
+            m_modificationFunctionMappings = new List<StorageEntityTypeModificationFunctionMapping>();
+            m_implicitlyMappedAssociationSetEnds = new List<AssociationSetEnd>();
+        }
+        #endregion
+
+        #region Fields
+        private readonly List<StorageEntityTypeModificationFunctionMapping> m_modificationFunctionMappings;
+        private readonly List<AssociationSetEnd> m_implicitlyMappedAssociationSetEnds;
+        #endregion
+
+        #region Properties
+        /// <summary>
+        /// Gets all function mappings for this entity set.
+        /// </summary>
+        internal IList<StorageEntityTypeModificationFunctionMapping> ModificationFunctionMappings {
+            get { return m_modificationFunctionMappings.AsReadOnly(); }
+        }
+
+        /// <summary>
+        /// Gets all association sets that are implicitly "covered" through function mappings.
+        /// </summary>
+        internal IList<AssociationSetEnd> ImplicitlyMappedAssociationSetEnds {
+            get { return m_implicitlyMappedAssociationSetEnds.AsReadOnly(); }
+        }
+
+
+        /// <summary>
+        /// Whether the EntitySetMapping has empty content
+        /// Returns true if there are no Function Maps and no table Mapping fragments
+        /// </summary>
+        internal override bool HasNoContent {
+            get {
+                if (m_modificationFunctionMappings.Count != 0) {
+                    return false;
+                }
+                return base.HasNoContent;
+            }
+        }
+        #endregion
+
+        #region Methods
+        /// <summary>
+        /// This method is primarily for debugging purposes.
+        /// Will be removed shortly.
+        /// </summary>
+        internal override void Print(int index) {
+            StorageEntityContainerMapping.GetPrettyPrintString(ref index);
+            StringBuilder sb = new StringBuilder();
+            sb.Append("EntitySetMapping");
+            sb.Append("   ");
+            sb.Append("Name:");
+            sb.Append(this.Set.Name);
+            if (this.QueryView != null)
+            {
+                sb.Append("   ");
+                sb.Append("Query View:");
+                sb.Append(this.QueryView);
+            }
+            Console.WriteLine(sb.ToString());
+            foreach (StorageTypeMapping typeMapping in TypeMappings) {
+                typeMapping.Print(index+5);
+            }
+            foreach (StorageEntityTypeModificationFunctionMapping m in m_modificationFunctionMappings)
+            {
+                m.Print(index + 10);
+            }
+        }
+
+        /// <summary>
+        /// Requires:
+        /// - Function mapping refers to a sub-type of this entity set's element type
+        /// - Function mappings for types are not redundantly specified
+        /// Adds a new function mapping for this class.
+        /// </summary>
+        /// <param name="modificationFunctionMapping">Function mapping to add. May not be null.</param>
+        internal void AddModificationFunctionMapping(StorageEntityTypeModificationFunctionMapping modificationFunctionMapping) {
+            AssertModificationFunctionMappingInvariants(modificationFunctionMapping);
+
+            m_modificationFunctionMappings.Add(modificationFunctionMapping);
+
+            // check if any association sets are indirectly mapped within this function mapping
+            // through association navigation bindings
+            if (null != modificationFunctionMapping.DeleteFunctionMapping)
+            {
+                m_implicitlyMappedAssociationSetEnds.AddRange(modificationFunctionMapping.DeleteFunctionMapping.CollocatedAssociationSetEnds);
+            }
+            if (null != modificationFunctionMapping.InsertFunctionMapping)
+            {
+                m_implicitlyMappedAssociationSetEnds.AddRange(modificationFunctionMapping.InsertFunctionMapping.CollocatedAssociationSetEnds);
+            }
+            if (null != modificationFunctionMapping.UpdateFunctionMapping)
+            {
+                m_implicitlyMappedAssociationSetEnds.AddRange(modificationFunctionMapping.UpdateFunctionMapping.CollocatedAssociationSetEnds);
+            }
+        }
+
+        [Conditional("DEBUG")]
+        internal void AssertModificationFunctionMappingInvariants(StorageEntityTypeModificationFunctionMapping modificationFunctionMapping) {
+            Debug.Assert(null != modificationFunctionMapping, "modification function mapping must not be null");
+            Debug.Assert(modificationFunctionMapping.EntityType.Equals(this.Set.ElementType) ||
+                Helper.IsSubtypeOf(modificationFunctionMapping.EntityType, this.Set.ElementType),
+                "attempting to add a modification function mapping with the wrong entity type");
+            foreach (StorageEntityTypeModificationFunctionMapping existingMapping in m_modificationFunctionMappings) {
+                Debug.Assert(!existingMapping.EntityType.Equals(modificationFunctionMapping.EntityType),
+                    "modification function mapping already exists for this type");
+            }
+        }
+        #endregion
+    }
+}