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//---------------------------------------------------------------------
// <copyright file="RelationshipNavigation.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Globalization;
using System.Text;
using System.Threading;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// Cached dynamic method to get the property value from a CLR instance
/// </summary>
internal class NavigationPropertyAccessor
{
#region Constructors
public NavigationPropertyAccessor(string propertyName)
{
_propertyName = propertyName;
}
#endregion
#region Fields
private Func<object, object> _memberGetter;
private Action<object, object> _memberSetter;
private Action<object, object> _collectionAdd;
private Func<object, object, bool> _collectionRemove;
private Func<object> _collectionCreate;
private readonly string _propertyName;
#endregion
#region Properties
public bool HasProperty
{
get { return (_propertyName != null); }
}
public string PropertyName
{
get { return _propertyName; }
}
/// <summary>cached dynamic method to get the property value from a CLR instance</summary>
public Func<object, object> ValueGetter
{
get { return _memberGetter; }
set
{
System.Diagnostics.Debug.Assert(null != value, "clearing ValueGetter");
// It doesn't matter which delegate wins, but only one should be jitted
Interlocked.CompareExchange(ref _memberGetter, value, null);
}
}
/// <summary>cached dynamic method to set the property value from a CLR instance</summary>
public Action<object, object> ValueSetter
{
get { return _memberSetter; }
set
{
System.Diagnostics.Debug.Assert(null != value, "clearing ValueSetter");
// It doesn't matter which delegate wins, but only one should be jitted
Interlocked.CompareExchange(ref _memberSetter, value, null);
}
}
public Action<object, object> CollectionAdd
{
get { return _collectionAdd; }
set
{
System.Diagnostics.Debug.Assert(null != value, "clearing CollectionAdd");
// It doesn't matter which delegate wins, but only one should be jitted
Interlocked.CompareExchange(ref _collectionAdd, value, null);
}
}
public Func<object, object, bool> CollectionRemove
{
get { return _collectionRemove; }
set
{
System.Diagnostics.Debug.Assert(null != value, "clearing CollectionRemove");
// It doesn't matter which delegate wins, but only one should be jitted
Interlocked.CompareExchange(ref _collectionRemove, value, null);
}
}
public Func<object> CollectionCreate
{
get { return _collectionCreate; }
set
{
System.Diagnostics.Debug.Assert(null != value, "clearing CollectionCreate");
// It doesn't matter which delegate wins, but only one should be jitted
Interlocked.CompareExchange(ref _collectionCreate, value, null);
}
}
#endregion
#region Static Properties
public static NavigationPropertyAccessor NoNavigationProperty
{
get { return new NavigationPropertyAccessor(null); }
}
#endregion
}
}
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