public override DbExpression Visit(DbRefExpression expression)
{
EntityUtil.CheckArgumentNull(expression, "expression");
DbExpression result = expression;
EntityType targetType = (EntityType)TypeHelpers.GetEdmType <RefType>(expression.ResultType).ElementType;
DbExpression newArgument = this.VisitExpression(expression.Argument);
EntityType newType = (EntityType)this.VisitType(targetType);
EntitySet newSet = (EntitySet)this.VisitEntitySet(expression.EntitySet);
if (!object.ReferenceEquals(expression.Argument, newArgument) ||
!object.ReferenceEquals(targetType, newType) ||
!object.ReferenceEquals(expression.EntitySet, newSet))
{
result = CqtBuilder.RefFromKey(newSet, newArgument, newType);
}
NotifyIfChanged(expression, result);
return(result);
}
/// <summary> /// Typed visitor pattern method for DbRefExpression. /// </summary> /// <param name="expression">The DbRefExpression that is being visited.</param> /// <returns>An instance of TResultType.</returns> public abstract TResultType Visit(DbRefExpression expression);
/// <summary>
/// Visitor pattern method for <see cref="DbRefExpression"/>.
/// </summary>
/// <param name="expression">The DbRefExpression that is being visited.</param>
/// <exception cref="ArgumentNullException"><paramref name="expression"/> is null</exception>
public override void Visit(DbRefExpression expression)
{
VisitUnaryExpression(expression);
}
/// <summary> /// Visitor pattern method for DbRefExpression. /// </summary> /// <param name="expression">The DbRefExpression that is being visited.</param> public abstract void Visit(DbRefExpression expression);