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//---------------------------------------------------------------------
// <copyright file="OnOperation.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
namespace System.Data.EntityModel.SchemaObjectModel
{
using System.Data.Metadata.Edm;
using System.Data.Objects.DataClasses;
using System.Diagnostics;
using System.Xml;
/// <summary>
/// Represents an OnDelete, OnCopy, OnSecure, OnLock or OnSerialize element
/// </summary>
internal sealed class OnOperation : SchemaElement
{
private Operation _Operation;
private Action _Action;
/// <summary>
///
/// </summary>
/// <param name="parentElement"></param>
/// <param name="operation"></param>
public OnOperation(RelationshipEnd parentElement, Operation operation)
: base(parentElement)
{
Operation = operation;
}
/// <summary>
/// The operation
/// </summary>
public Operation Operation
{
get
{
return _Operation;
}
private set
{
_Operation = value;
}
}
/// <summary>
/// The action
/// </summary>
public Action Action
{
get
{
return _Action;
}
private set
{
_Action = value;
}
}
protected override bool ProhibitAttribute(string namespaceUri, string localName)
{
if (base.ProhibitAttribute(namespaceUri, localName))
{
return true;
}
if (namespaceUri == null && localName == XmlConstants.Name)
{
return false;
}
return false;
}
protected override bool HandleAttribute(XmlReader reader)
{
if (base.HandleAttribute(reader))
{
return true;
}
else if (CanHandleAttribute(reader, XmlConstants.Action))
{
HandleActionAttribute(reader);
return true;
}
return false;
}
/// <summary>
/// Handle the Action attribute
/// </summary>
/// <param name="reader">reader positioned at Action attribute</param>
private void HandleActionAttribute(XmlReader reader)
{
Debug.Assert(reader != null);
RelationshipKind relationshipKind = ParentElement.ParentElement.RelationshipKind;
switch ( reader.Value.Trim() )
{
case "None":
Action = Action.None;
break;
case "Cascade":
Action = Action.Cascade;
break;
default:
AddError( ErrorCode.InvalidAction, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.InvalidAction(reader.Value, ParentElement.FQName ) );
break;
}
}
/// <summary>
/// the parent element.
/// </summary>
private new RelationshipEnd ParentElement
{
get
{
return (RelationshipEnd)base.ParentElement;
}
}
}
}
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