/// <summary>
/// Determines whether two instances of <see cref="T:AclEntry" /> are equal (by value).
/// </summary>
/// <param name="x">The first instance.</param>
/// <param name="y">The second instance.</param>
/// <returns><c>true</c> if <b>x</b> equals <b>y</b>, <c>false</c> otherwise.</returns>
public static bool Equals(AclEntry x, AclEntry y)
{
if (x is null && !(x is null))
{
return(false);
}
if (!(x is null) && x is null)
{
return(false);
}
if (x is null && x is null)
{
return(true);
}
return(x.Equals(y));
}
/// <summary>
/// Deletes an ACL entry.
/// </summary>
/// <param name="resource">The controlled resource.</param>
/// <param name="action">The action on the controlled resource.</param>
/// <param name="subject">The subject whose access to the resource/action is controlled.</param>
/// <returns><c>true</c> if the entry is deleted, <c>false</c> otherwise.</returns>
/// <exception cref="ArgumentNullException">If <paramref name="resource"/>, <paramref name="action"/> or <paramref name="subject"/> are <c>null</c>.</exception>
/// <exception cref="ArgumentException">If <paramref name="resource"/>, <paramref name="action"/> or <paramref name="subject"/> are empty.</exception>
public bool DeleteEntry(string resource, string action, string subject)
{
if (resource == null)
{
throw new ArgumentNullException("resource");
}
if (resource.Length == 0)
{
throw new ArgumentException("Resource cannot be empty.", "resource");
}
if (action == null)
{
throw new ArgumentNullException("action");
}
if (action.Length == 0)
{
throw new ArgumentException("Action cannot be empty.", "action");
}
if (subject == null)
{
throw new ArgumentNullException("subject");
}
if (subject.Length == 0)
{
throw new ArgumentException("Subject cannot be empty.", "subject");
}
AclEntry result = new AclEntry(resource, action, subject, Value.Deny);
lock (this)
{
int index = _entries.FindIndex(delegate(AclEntry x) { return(AclEntry.Equals(x, result)); });
if (index >= 0)
{
AclEntry entry = _entries[index];
_entries.RemoveAt(index);
OnAclChanged(new AclEntry[] { entry }, Change.EntryDeleted);
return(true);
}
else
{
return(false);
}
}
}