System.Data.Common.DBDataPermission.Copy()

Here are the examples of the csharp api class System.Data.Common.DBDataPermission.Copy() taken from open source projects. By voting up you can indicate which examples are most useful and appropriate.

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();
            }

            DBDataPermission newPermission = (DBDataPermission) 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;
        }

override public IPermission Union(IPermission target) {
            if (null == target) {
                return this.Copy();
            }
            if (target.GetType() != this.GetType()) {
                throw ADP.PermissionTypeMismatch();
            }
            if (IsUnrestricted()) { // MDAC 84803
                return this.Copy();
            }

            DBDataPermission newPermission = (DBDataPermission) target.Copy();
            if (!newPermission.IsUnrestricted()) {
                newPermission._allowBlankPassword |= AllowBlankPassword;

                if (null != _keyvalues) {
                    foreach(DBConnectionString entry in _keyvalues) {
                        newPermission.AddPermissionEntry(entry);
                    }
                }
            }
            return (newPermission.IsEmpty() ? null : newPermission);
        }