override public IPermission Intersect(IPermission target)
{ // used during Deny actions
if (null == target)
{
return(null);
}
if (target.GetType() != this.GetType())
{
throw ADP.PermissionTypeMismatch();
}
if (this.IsUnrestricted())
{ // MDAC 84803, NDPWhidbey 29121
return(target.Copy());
}
DBDataPermission operand = (DBDataPermission)target;
if (operand.IsUnrestricted())
{ // NDPWhidbey 29121
return(this.Copy());
}
SqlClientPermission newPermission = (SqlClientPermission)operand.Copy();
newPermission.AllowBlankPassword &= AllowBlankPassword;
if ((null != _keyvalues) && (null != newPermission._keyvalues))
{
newPermission._keyvalues.Clear();
newPermission._keyvaluetree.Intersect(newPermission._keyvalues, _keyvaluetree);
}
else
{
// either target.Add or this.Add have not been called
// return a non-null object so IsSubset calls will fail
newPermission._keyvalues = null;
newPermission._keyvaluetree = null;
}
if (newPermission.IsEmpty())
{ // no intersection, MDAC 86773
newPermission = null;
}
return(newPermission);
}
public override IPermission Intersect(IPermission target)
{
// FIXME: restrictions not completely implemented - nor documented
DBDataPermission dbdp = Cast(target);
if (dbdp == null)
{
return(null);
}
if (IsUnrestricted())
{
if (dbdp.IsUnrestricted())
{
DBDataPermission u = CreateInstance();
u.state = PermissionState.Unrestricted;
return(u);
}
return(dbdp.Copy());
}
if (dbdp.IsUnrestricted())
{
return(Copy());
}
if (IsEmpty() || dbdp.IsEmpty())
{
return(null);
}
DBDataPermission p = CreateInstance();
p.allowBlankPassword = (allowBlankPassword && dbdp.allowBlankPassword);
foreach (DictionaryEntry de in _connections)
{
object o = dbdp._connections [de.Key];
if (o != null)
{
p._connections.Add(de.Key, de.Value);
}
}
return((p._connections.Count > 0) ? p : null);
}
public override IPermission Intersect(IPermission target)
{
if (target == null)
{
return(null);
}
if (target.GetType() != base.GetType())
{
throw ADP.PermissionTypeMismatch();
}
if (this.IsUnrestricted())
{
return(target.Copy());
}
DBDataPermission permission2 = (DBDataPermission)target;
if (permission2.IsUnrestricted())
{
return(this.Copy());
}
DBDataPermission permission = (DBDataPermission)permission2.Copy();
permission._allowBlankPassword &= this.AllowBlankPassword;
if ((this._keyvalues != null) && (permission._keyvalues != null))
{
permission._keyvalues.Clear();
permission._keyvaluetree.Intersect(permission._keyvalues, this._keyvaluetree);
}
else
{
permission._keyvalues = null;
permission._keyvaluetree = null;
}
if (permission.IsEmpty())
{
permission = null;
}
return(permission);
}
