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//---------------------------------------------------------------------
// <copyright file="AssociationSetEnd.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.Text;
namespace System.Data.Metadata.Edm
{
/// <summary>
/// Class representing a AssociationSet End
/// </summary>
public sealed class AssociationSetEnd : MetadataItem
{
#region Constructors
/// <summary>
/// Initializes a new instance of AssocationSetEnd
/// </summary>
/// <param name="entitySet">Entity set that this end refers to</param>
/// <param name="parentSet">The association set which this belongs to</param>
/// <param name="endMember">The end member of the association set which this is an instance of</param>
/// <exception cref="System.ArgumentNullException">Thrown if either the role,entitySet, parentSet or endMember arguments are null </exception>
internal AssociationSetEnd(EntitySet entitySet, AssociationSet parentSet, AssociationEndMember endMember)
{
_entitySet = EntityUtil.GenericCheckArgumentNull(entitySet, "entitySet");
_parentSet = EntityUtil.GenericCheckArgumentNull(parentSet, "parentSet");
_endMember = EntityUtil.GenericCheckArgumentNull(endMember, "endMember");
}
#endregion
#region Fields
private readonly EntitySet _entitySet;
private readonly AssociationSet _parentSet;
private readonly AssociationEndMember _endMember;
#endregion
#region Properties
/// <summary>
/// Returns the kind of the type
/// </summary>
public override BuiltInTypeKind BuiltInTypeKind { get { return BuiltInTypeKind.AssociationSetEnd; } }
/// <summary>
/// The parent association set for this AssociationSetEnd.
/// </summary>
/// <exception cref="System.ArgumentNullException">Thrown if the value passed in for the setter is null </exception>
/// <exception cref="System.InvalidOperationException">Thrown if Setter is called when the AssociationSetEnd instance is in ReadOnly state</exception>
[MetadataProperty(BuiltInTypeKind.AssociationSet, false)]
public AssociationSet ParentAssociationSet
{
get
{
return _parentSet;
}
}
/// <summary>
/// The EndMember which this AssociationSetEnd corresponds to.
/// </summary>
/// <exception cref="System.ArgumentNullException">Thrown if the value passed in for the setter is null </exception>
/// <exception cref="System.InvalidOperationException">Thrown if Setter is called when the AssociationSetEnd instance is in ReadOnly state</exception>
[MetadataProperty(BuiltInTypeKind.AssociationEndMember, false)]
public AssociationEndMember CorrespondingAssociationEndMember
{
get
{
return _endMember;
}
}
/// <summary>
/// Name of the end
/// </summary>
[MetadataProperty(PrimitiveTypeKind.String, false)]
public string Name
{
get
{
return CorrespondingAssociationEndMember.Name;
}
}
/// <summary>
/// Name of the end role
/// </summary>
/// <exception cref="System.ArgumentNullException">Thrown if the value passed in for the setter is null </exception>
/// <exception cref="System.InvalidOperationException">Thrown if Setter is called when the AssociationSetEnd instance is in ReadOnly state</exception>
[MetadataProperty(PrimitiveTypeKind.String, false)]
[Obsolete("This property is going away, please use the Name property instead")]
public string Role
{
get
{
return Name;
}
}
/// <summary>
/// Returns the entity set referred by this end role
/// </summary>
[MetadataProperty(BuiltInTypeKind.EntitySet, false)]
public EntitySet EntitySet
{
get
{
return _entitySet;
}
}
/// <summary>
/// Gets the identity of this item
/// </summary>
internal override string Identity
{
get
{
return this.Name;
}
}
#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 this item to be readonly, once this is set, the item will never be writable again.
/// </summary>
internal override void SetReadOnly()
{
if (!IsReadOnly)
{
base.SetReadOnly();
AssociationSet parentAssociationSet = ParentAssociationSet;
if (parentAssociationSet != null)
{
parentAssociationSet.SetReadOnly();
}
AssociationEndMember endMember = CorrespondingAssociationEndMember;
if (endMember != null)
{
endMember.SetReadOnly();
}
EntitySet entitySet = EntitySet;
if (entitySet != null)
{
entitySet.SetReadOnly();
}
}
}
#endregion
}
}
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