private DbExpression VisitUnary(DbUnaryExpression expression, Func <DbExpression, DbExpression> callback)
{
DbExpression result = expression;
var newArgument = VisitExpression(expression.Argument);
if (!ReferenceEquals(expression.Argument, newArgument))
{
result = callback(newArgument);
}
NotifyIfChanged(expression, result);
return(result);
}
private DbExpression VisitTypeUnary(
DbUnaryExpression expression, TypeUsage type, Func <DbExpression, TypeUsage, DbExpression> callback)
{
DbExpression result = expression;
var newArgument = VisitExpression(expression.Argument);
var newType = VisitTypeUsage(type);
if (!ReferenceEquals(expression.Argument, newArgument)
||
!ReferenceEquals(type, newType))
{
result = callback(newArgument, newType);
}
NotifyIfChanged(expression, result);
return(result);
}
/// <summary>
/// Convenience method to visit the specified <see cref="DbUnaryExpression" />.
/// </summary>
/// <param name="expression"> The DbUnaryExpression to visit. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
protected virtual void VisitUnaryExpression(DbUnaryExpression expression)
{
Check.NotNull(expression, "expression");
VisitExpression(expression.Argument);
}
/// <summary>
/// Convenience method to visit the specified <see cref="DbUnaryExpression" />.
/// </summary>
/// <param name="expression"> The DbUnaryExpression to visit. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
protected virtual void VisitUnaryExpression(DbUnaryExpression expression)
{
VisitExpression(Check.NotNull(expression, "expression").Argument);
}
//internal virtual void VisitRelatedEntityReference(DbRelatedEntityRef relatedEntityRef)
//{
// VisitExpression(relatedEntityRef.TargetEntityReference);
//}
//internal virtual void VisitRelatedEntityReferenceList(IList<DbRelatedEntityRef> relatedEntityReferences)
//{
// for (int i = 0; i < relatedEntityReferences.Count; i++)
// {
// VisitRelatedEntityReference(relatedEntityReferences[i]);
// }
//}
protected virtual void VisitUnaryExpression(DbUnaryExpression expression)
{
if (expression == null) throw new ArgumentException("expression");
VisitExpression(expression.Argument);
}
/// <summary>
/// Convenience method to visit the specified <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbUnaryExpression" />.
/// </summary>
/// <param name="expression"> The DbUnaryExpression to visit. </param>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
protected virtual void VisitUnaryExpression(DbUnaryExpression expression)
{
Check.NotNull <DbUnaryExpression>(expression, nameof(expression));
this.VisitExpression(expression.Argument);
}
