/// <inheritdoc />
public bool AddLockRw(Node n, Perm perm, int level, bool isChildEphemeral)
{
if (n == null)
{
throw new ArgumentNullException("n");
}
n.Persisted.AppendRead(this.changelist);
ISessionAuth auth = this.sessionAuth;
if (!auth.IsSuperSession)
{
n.AclAllows(auth, perm);
}
if (this.onlyOnEphemeral)
{
bool allowed = true;
// n is ephemeral --> allowed.
// n is not ephemeral --> maybe.
if (!n.Persisted.IsEphemeral)
{
if (perm != Perm.CREATE)
{
// not CREATE --> disallowed
allowed = false;
}
else
{
// if child is not ephemeral, disallowed
if (!isChildEphemeral)
{
allowed = false;
}
}
}
if (!allowed)
{
throw new InvalidAclException(Node.BuildPath(n.Persisted), "only ephemerals can be modified by this session");
}
}
// check for lockdown path
this.ValidatePathNotInLockDown(n, true);
if (!auth.IsLockFreeSession)
{
this.lockCollections.AddLock(n, level, true);
return(true);
}
return(false);
}
/// <summary>
/// performs the validation for the locks acquired at this time.
/// all nodes ancestors to child need to be in the RO lock list
/// parent node needs to be in the RO if permParent is READ, or in the RW if permParent is > READ
/// child node needs to be in the RO if permChild is READ, or in the RW if permChild is > READ
/// </summary>
/// <param name="parent">the parent node</param>
/// <param name="permParent">the permissions supposed for the parent</param>
/// <param name="child">the child node</param>
/// <param name="permChild">the permissions supposed for the child</param>
public void ValidateLockList(IPersistedData parent, Perm permParent, IPersistedData child, Perm permChild)
{
if (!DoLockingValidation)
{
return;
}
if (parent != null)
{
int parentlevel = parent.Node.GetLevel();
if (permParent == Perm.READ)
{
if (this.AddLockRo(parent.Node, parentlevel))
{
throw new InvalidOperationException();
}
}
else if (permParent != Perm.NONE)
{
bool isEphemeral = false;
if (child == null || child.IsEphemeral)
{
isEphemeral = true;
}
if (this.AddLockRw(parent.Node, permParent, parentlevel, isEphemeral))
{
throw new InvalidOperationException();
}
}
}
if (child != null)
{
int level;
if (parent == null)
{
level = child.Node.GetLevel();
}
else
{
level = parent.Node.GetLevel() + 1;
}
if (permChild == Perm.READ)
{
if (this.AddLockRo(child.Node, level))
{
throw new InvalidOperationException();
}
}
else if (permChild != Perm.NONE)
{
if (this.AddLockRw(child.Node, permChild, level, child.IsEphemeral))
{
throw new InvalidOperationException();
}
}
Node n = child.Node;
while (n != null)
{
n = n.Parent;
if (n == null)
{
break;
}
if (this.AddLockRo(n, n.GetLevel()))
{
throw new InvalidOperationException();
}
}
}
}
/// <inheritdoc />
public void ValidateLockList(IPersistedData parent, Perm permParent, IPersistedData child, Perm permChild)
{
}
/// <inheritdoc />
public bool AddLockRw(Node parent, Perm cREATE, int parentLevel, bool isChildEphemeral)
{
throw new NotSupportedException();
}