EntityType.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Metadata / Edm / EntityType.cs / 1 / EntityType.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
using System; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Data.Common;
using System.Diagnostics;
using System.Text;
using System.Threading; 

namespace System.Data.Metadata.Edm 
{ 
    /// 
    /// concrete Representation the Entity Type 
    /// 
    public class EntityType : EntityTypeBase
    {
        #region Constructors 
        /// 
        /// Initializes a new instance of Entity Type 
        ///  
        /// name of the entity type
        /// namespace of the entity type 
        /// version of the entity type
        /// dataspace in which the EntityType belongs to
        /// Thrown if either name, namespace or version arguments are null
        internal EntityType(string name, string namespaceName, DataSpace dataSpace) 
            : base(name, namespaceName, dataSpace)
        { 
        } 

        /// name of the entity type 
        /// namespace of the entity type
        /// version of the entity type
        /// dataspace in which the EntityType belongs to
        /// members of the entity type [property and navigational property] 
        /// key members for the type
        /// Thrown if either name, namespace or version arguments are null 
        internal EntityType(string name, 
                          string namespaceName,
                          DataSpace dataSpace, 
                          IEnumerable keyMemberNames,
                          IEnumerable members)
            : base(name, namespaceName, dataSpace)
        { 
            //--- first add the properties
            if (null != members) 
            { 
                CheckAndAddMembers(members, this);
            } 
            //--- second add the key members
            if (null != keyMemberNames)
            {
                //Validation should make sure that base type of this type does not have keymembers when this type has keymembers. 
                CheckAndAddKeyMembers(keyMemberNames);
            } 
        } 

 
        #endregion

        #region Fields
        /// cached dynamic method to construct a CLR instance 
        private RefType _referenceType;
        private ReadOnlyMetadataCollection _properties; 
        private RowType _keyRow; 
        private Dictionary _memberSql;
        private object _memberSqlLock = new object(); 
        #endregion

        #region Methods
        ///  
        /// Returns the kind of the type
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.EntityType; } } 

        ///  
        /// Validates a EdmMember object to determine if it can be added to this type's
        /// Members collection. If this method returns without throwing, it is assumed
        /// the member is valid.
        ///  
        /// The member to validate
        /// Thrown if the member is not a EdmProperty 
        internal override void ValidateMemberForAdd(EdmMember member) 
        {
            if (!Helper.IsEdmProperty(member) && !Helper.IsNavigationProperty(member)) 
            {
                throw EntityUtil.EntityTypeInvalidMembers();
            }
        } 

        ///  
        /// Get SQL description of a member of this entity type. 
        /// Requires: member must belong to this type
        ///  
        /// Member for which to retrieve SQL
        /// Outputs SQL describing this member
        /// Whether sql is cached for this member
        internal bool TryGetMemberSql(EdmMember member, out string sql) 
        {
            Debug.Assert(Members.Contains(member)); 
            sql = null; 
            return null != _memberSql && _memberSql.TryGetValue(member, out sql);
        } 

        /// 
        /// Sets SQL describing a member of this entity type.
        /// Requires: member must belong to this type 
        /// 
        /// Member for which to set SQL 
        /// SQL describing this member 
        internal void SetMemberSql(EdmMember member, string sql)
        { 
            Debug.Assert(Members.Contains(member));

            // initialize dictionary on first use
            lock (_memberSqlLock) 
            {
                if (null == _memberSql) 
                { 
                    _memberSql = new Dictionary();
                } 

                _memberSql[member] = sql;
            }
        } 
        #endregion
 
        #region Properties 

        ///  
        /// Returns the list of Navigation Properties for this entity type
        /// 
        public ReadOnlyMetadataCollection NavigationProperties
        { 
            get
            { 
                return new FilteredReadOnlyMetadataCollection( 
                    ((ReadOnlyMetadataCollection)this.Members), Helper.IsNavigationProperty);
            } 
        }

        /// 
        /// Returns just the properties from the collection 
        /// of members on this type
        ///  
        public ReadOnlyMetadataCollection Properties 
        {
            get 
            {
                Debug.Assert(IsReadOnly, "this is a wrapper around this.Members, don't call it during metadata loading, only call it after the metadata is set to readonly");
                if (null == _properties)
                { 
                    Interlocked.CompareExchange(ref _properties,
                        new FilteredReadOnlyMetadataCollection( 
                            this.Members, Helper.IsEdmProperty), null); 
                }
                return _properties; 
            }
        }

        ///  
        /// Returns the Reference type pointing to this entity type
        ///  
        ///  
        public RefType GetReferenceType()
        { 
            if (_referenceType == null)
            {
                Interlocked.CompareExchange(ref _referenceType, new RefType(this), null);
            } 
            return _referenceType;
        } 
 
        internal RowType GetKeyRowType(MetadataWorkspace metadataWorkspace)
        { 
            if (_keyRow == null)
            {
                List keyProperties = new List(KeyMembers.Count);
                foreach (EdmMember keyMember in KeyMembers) 
                {
                    keyProperties.Add(new EdmProperty(keyMember.Name, Helper.GetModelTypeUsage(keyMember))); 
                } 
                Interlocked.CompareExchange(ref _keyRow, new RowType(keyProperties), null);
            } 
            return _keyRow;
        }

        #endregion // Properties 
    }
 
    internal sealed class ClrEntityType : EntityType 
    {
        /// cached CLR type handle, allowing the Type reference to be GC'd 
        private readonly System.RuntimeTypeHandle _type;

        /// cached dynamic method to construct a CLR instance
        private Delegate _constructor; 

        private readonly string _cspaceTypeName; 
 
        /// 
        /// Initializes a new instance of Complex Type with properties from the type. 
        /// 
        /// The CLR type to construct from
        internal ClrEntityType(Type type, string cspaceNamespaceName, string cspaceTypeName)
            : base(EntityUtil.GenericCheckArgumentNull(type, "type").Name, type.Namespace ?? string.Empty, 
            DataSpace.OSpace)
        { 
            System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(cspaceNamespaceName) && 
                !String.IsNullOrEmpty(cspaceTypeName), "Mapping information must never be null");
 
            _type = type.TypeHandle;
            _cspaceTypeName = cspaceNamespaceName + "." + cspaceTypeName;
            this.Abstract = type.IsAbstract;
        } 

        /// cached dynamic method to construct a CLR instance 
        internal Delegate Constructor 
        {
            get { return _constructor; } 
            set
            {
                // It doesn't matter which delegate wins, but only one should be jitted
                Interlocked.CompareExchange(ref _constructor, value, null); 
            }
        } 
 
        /// 
        ///  
        internal override System.Type ClrType
        {
            get { return Type.GetTypeFromHandle(_type); }
        } 

        internal string CSpaceTypeName { get { return _cspaceTypeName; } } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//--------------------------------------------------------------------- 
using System; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Data.Common;
using System.Diagnostics;
using System.Text;
using System.Threading; 

namespace System.Data.Metadata.Edm 
{ 
    /// 
    /// concrete Representation the Entity Type 
    /// 
    public class EntityType : EntityTypeBase
    {
        #region Constructors 
        /// 
        /// Initializes a new instance of Entity Type 
        ///  
        /// name of the entity type
        /// namespace of the entity type 
        /// version of the entity type
        /// dataspace in which the EntityType belongs to
        /// Thrown if either name, namespace or version arguments are null
        internal EntityType(string name, string namespaceName, DataSpace dataSpace) 
            : base(name, namespaceName, dataSpace)
        { 
        } 

        /// name of the entity type 
        /// namespace of the entity type
        /// version of the entity type
        /// dataspace in which the EntityType belongs to
        /// members of the entity type [property and navigational property] 
        /// key members for the type
        /// Thrown if either name, namespace or version arguments are null 
        internal EntityType(string name, 
                          string namespaceName,
                          DataSpace dataSpace, 
                          IEnumerable keyMemberNames,
                          IEnumerable members)
            : base(name, namespaceName, dataSpace)
        { 
            //--- first add the properties
            if (null != members) 
            { 
                CheckAndAddMembers(members, this);
            } 
            //--- second add the key members
            if (null != keyMemberNames)
            {
                //Validation should make sure that base type of this type does not have keymembers when this type has keymembers. 
                CheckAndAddKeyMembers(keyMemberNames);
            } 
        } 

 
        #endregion

        #region Fields
        /// cached dynamic method to construct a CLR instance 
        private RefType _referenceType;
        private ReadOnlyMetadataCollection _properties; 
        private RowType _keyRow; 
        private Dictionary _memberSql;
        private object _memberSqlLock = new object(); 
        #endregion

        #region Methods
        ///  
        /// Returns the kind of the type
        ///  
        public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.EntityType; } } 

        ///  
        /// Validates a EdmMember object to determine if it can be added to this type's
        /// Members collection. If this method returns without throwing, it is assumed
        /// the member is valid.
        ///  
        /// The member to validate
        /// Thrown if the member is not a EdmProperty 
        internal override void ValidateMemberForAdd(EdmMember member) 
        {
            if (!Helper.IsEdmProperty(member) && !Helper.IsNavigationProperty(member)) 
            {
                throw EntityUtil.EntityTypeInvalidMembers();
            }
        } 

        ///  
        /// Get SQL description of a member of this entity type. 
        /// Requires: member must belong to this type
        ///  
        /// Member for which to retrieve SQL
        /// Outputs SQL describing this member
        /// Whether sql is cached for this member
        internal bool TryGetMemberSql(EdmMember member, out string sql) 
        {
            Debug.Assert(Members.Contains(member)); 
            sql = null; 
            return null != _memberSql && _memberSql.TryGetValue(member, out sql);
        } 

        /// 
        /// Sets SQL describing a member of this entity type.
        /// Requires: member must belong to this type 
        /// 
        /// Member for which to set SQL 
        /// SQL describing this member 
        internal void SetMemberSql(EdmMember member, string sql)
        { 
            Debug.Assert(Members.Contains(member));

            // initialize dictionary on first use
            lock (_memberSqlLock) 
            {
                if (null == _memberSql) 
                { 
                    _memberSql = new Dictionary();
                } 

                _memberSql[member] = sql;
            }
        } 
        #endregion
 
        #region Properties 

        ///  
        /// Returns the list of Navigation Properties for this entity type
        /// 
        public ReadOnlyMetadataCollection NavigationProperties
        { 
            get
            { 
                return new FilteredReadOnlyMetadataCollection( 
                    ((ReadOnlyMetadataCollection)this.Members), Helper.IsNavigationProperty);
            } 
        }

        /// 
        /// Returns just the properties from the collection 
        /// of members on this type
        ///  
        public ReadOnlyMetadataCollection Properties 
        {
            get 
            {
                Debug.Assert(IsReadOnly, "this is a wrapper around this.Members, don't call it during metadata loading, only call it after the metadata is set to readonly");
                if (null == _properties)
                { 
                    Interlocked.CompareExchange(ref _properties,
                        new FilteredReadOnlyMetadataCollection( 
                            this.Members, Helper.IsEdmProperty), null); 
                }
                return _properties; 
            }
        }

        ///  
        /// Returns the Reference type pointing to this entity type
        ///  
        ///  
        public RefType GetReferenceType()
        { 
            if (_referenceType == null)
            {
                Interlocked.CompareExchange(ref _referenceType, new RefType(this), null);
            } 
            return _referenceType;
        } 
 
        internal RowType GetKeyRowType(MetadataWorkspace metadataWorkspace)
        { 
            if (_keyRow == null)
            {
                List keyProperties = new List(KeyMembers.Count);
                foreach (EdmMember keyMember in KeyMembers) 
                {
                    keyProperties.Add(new EdmProperty(keyMember.Name, Helper.GetModelTypeUsage(keyMember))); 
                } 
                Interlocked.CompareExchange(ref _keyRow, new RowType(keyProperties), null);
            } 
            return _keyRow;
        }

        #endregion // Properties 
    }
 
    internal sealed class ClrEntityType : EntityType 
    {
        /// cached CLR type handle, allowing the Type reference to be GC'd 
        private readonly System.RuntimeTypeHandle _type;

        /// cached dynamic method to construct a CLR instance
        private Delegate _constructor; 

        private readonly string _cspaceTypeName; 
 
        /// 
        /// Initializes a new instance of Complex Type with properties from the type. 
        /// 
        /// The CLR type to construct from
        internal ClrEntityType(Type type, string cspaceNamespaceName, string cspaceTypeName)
            : base(EntityUtil.GenericCheckArgumentNull(type, "type").Name, type.Namespace ?? string.Empty, 
            DataSpace.OSpace)
        { 
            System.Diagnostics.Debug.Assert(!String.IsNullOrEmpty(cspaceNamespaceName) && 
                !String.IsNullOrEmpty(cspaceTypeName), "Mapping information must never be null");
 
            _type = type.TypeHandle;
            _cspaceTypeName = cspaceNamespaceName + "." + cspaceTypeName;
            this.Abstract = type.IsAbstract;
        } 

        /// cached dynamic method to construct a CLR instance 
        internal Delegate Constructor 
        {
            get { return _constructor; } 
            set
            {
                // It doesn't matter which delegate wins, but only one should be jitted
                Interlocked.CompareExchange(ref _constructor, value, null); 
            }
        } 
 
        /// 
        ///  
        internal override System.Type ClrType
        {
            get { return Type.GetTypeFromHandle(_type); }
        } 

        internal string CSpaceTypeName { get { return _cspaceTypeName; } } 
    } 
}

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

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