StorageSetMapping.cs source code in C# .NET

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Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Mapping / StorageSetMapping.cs / 1305376 / StorageSetMapping.cs

                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Data.Metadata.Edm; 
using System.Data.Common.Utils;
using System.Diagnostics; 
using System.Linq; 

namespace System.Data.Mapping { 

    using Triple = Pair>;

    ///  
    /// Represents the Mapping metadata for an Extent in ES space.
    ///  
    ///  
    /// For Example if conceptually you could represent the ES MSL file as following
    /// --Mapping 
    ///   --EntityContainerMapping ( CNorthwind-->SNorthwind )
    ///     --EntitySetMapping
    ///       --EntityTypeMapping
    ///         --TableMappingFragment 
    ///       --EntityTypeMapping
    ///         --TableMappingFragment 
    ///     --AssociationSetMapping 
    ///       --AssociationTypeMapping
    ///         --TableMappingFragment 
    ///   --EntityContainerMapping ( CMyDatabase-->SMyDatabase )
    ///     --CompositionSetMapping
    ///       --CompositionTypeMapping
    /// This class represents the metadata for all the extent map elements in the 
    /// above example namely EntitySetMapping, AssociationSetMapping and CompositionSetMapping.
    /// The SetMapping elements that are children of the EntityContainerMapping element 
    /// can be accessed through the properties on this type. 
    /// 
    internal abstract class StorageSetMapping 
    {
        #region Constructors
        /// 
        /// Construct the new ExtentMapping object. 
        /// 
        /// Extent metadata object 
        /// The EntityContainer mapping that contains this extent mapping 
        internal StorageSetMapping(EntitySetBase extent, StorageEntityContainerMapping entityContainerMapping) {
            this.m_entityContainerMapping = entityContainerMapping; 
            this.m_extent = extent;
            this.m_typeMappings = new List();
        }
        #endregion 

        #region Fields 
        private StorageEntityContainerMapping m_entityContainerMapping;  //The EntityContainer mapping that contains this extent mapping 
        private EntitySetBase m_extent;  //The extent for which this mapping represents.
        private List m_typeMappings;  //Set of type mappings that make up the Set Mapping 
                                                          //Unless this is a EntitySetMapping with inheritance,
                                                          //you would have a single type mapping per set
        private string m_queryView;  //User defined Query View for the EntitySet
        private int m_startLineNumber; //Line Number for Set Mapping element start tag 
        private int m_startLinePosition; //Line position for Set Mapping element start tag
        private bool m_hasModificationFunctionMapping; // has modificationfunctionmapping for set mapping 
 
        //Stores type-Specific user-defined QueryViews
        private Dictionary m_typeSpecificQueryViews = 
            new Dictionary(Triple.PairComparer.Instance);

        #endregion
 
        #region Properties
        ///  
        /// The set for which this mapping is for 
        /// 
        internal EntitySetBase Set 
        {
            get {
                return this.m_extent;
            } 
        }
 
        /////  
        ///// TypeMappings that make up this set type.
        ///// For AssociationSet and CompositionSet there will be one type( atleast thats what 
        ///// we expect as of now). EntitySet could have mappings for multiple Entity types.
        ///// 
        internal ReadOnlyCollection TypeMappings
        { 
            get
            { 
                return this.m_typeMappings.AsReadOnly(); 
            }
        } 

        internal StorageEntityContainerMapping EntityContainerMapping
        {
            get 
            {
                return m_entityContainerMapping; 
            } 
        }
 
        /// 
        /// Whether the SetMapping has empty content
        /// Returns true if there no table Mapping fragments
        ///  
        internal virtual bool HasNoContent
        { 
            get 
            {
                if (QueryView != null) 
                {
                    return false;
                }
                foreach (StorageTypeMapping typeMap in TypeMappings) 
                {
                    foreach (StorageMappingFragment mapFragment in typeMap.MappingFragments) 
                    { 
                        foreach (StoragePropertyMapping propertyMap in mapFragment.AllProperties)
                        { 
                            return false;
                        }

                    } 
                }
                return true; 
            } 
        }
 
        internal string QueryView
        {
            get { return m_queryView; }
            set { m_queryView = value; } 
        }
 
        ///  
        /// Line Number in MSL file where the Set Mapping Element's Start Tag is present.
        ///  
        internal int StartLineNumber
        {
            get
            { 
                return m_startLineNumber;
            } 
            set 
            {
                m_startLineNumber = value; 
            }
        }

        ///  
        /// Line Position in MSL file where the Set Mapping Element's Start Tag is present.
        ///  
        internal int StartLinePosition 
        {
            get 
            {
                return m_startLinePosition;
            }
            set 
            {
                m_startLinePosition = value; 
            } 
        }
 
        internal bool HasModificationFunctionMapping
        {
            get
            { 
                return m_hasModificationFunctionMapping;
            } 
            set 
            {
                m_hasModificationFunctionMapping = value; 
            }
        }
        #endregion
 

        #region Methods 
        ///  
        /// Add type mapping as a child under this SetMapping
        ///  
        /// 
        internal void AddTypeMapping(StorageTypeMapping typeMapping)
        {
            this.m_typeMappings.Add(typeMapping); 
        }
 
        ///  
        /// This method is primarily for debugging purposes.
        /// Will be removed shortly. 
        /// 
        internal abstract void Print(int index);

 
        internal bool ContainsTypeSpecificQueryView(Triple key)
        { 
            return m_typeSpecificQueryViews.ContainsKey(key); 
        }
 
        /// 
        /// Stores a type-specific user-defiend QueryView so that it can be loaded
        /// into StorageMappingItemCollection's view cache.
        ///  
        internal void AddTypeSpecificQueryView(Triple key, string viewString)
        { 
            Debug.Assert(!m_typeSpecificQueryViews.ContainsKey(key), "Query View already present for the given Key"); 
            m_typeSpecificQueryViews.Add(key, viewString);
        } 

        internal ReadOnlyCollection GetTypeSpecificQVKeys()
        {
            return new ReadOnlyCollection(m_typeSpecificQueryViews.Keys.ToList()); 
        }
 
        internal string GetTypeSpecificQueryView(Triple key) 
        {
            Debug.Assert(m_typeSpecificQueryViews.ContainsKey(key)); 
            return m_typeSpecificQueryViews[key];
        }

        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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