mcs/class/System.ServiceModel/System.ServiceModel.Channels/BinaryMessageEncoder.cs

   1 //
   2 // BinaryMessageEncoder.cs
   3 //
   4 // Author: Atsushi Enomoto (atsushi@ximian.com)
   5 //
   6 // Copyright (C) 2005,2009 Novell, Inc (http://www.novell.com)
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27 using System;
  28 using System.IO;
  29 using System.Collections.ObjectModel;
  30 using System.ServiceModel;
  31 using System.Text;
  32 using System.Xml;
  33
  34 namespace System.ServiceModel.Channels
  35 {
  36         internal class BinaryMessageEncoder : MessageEncoder
  37         {
  38                 static XmlDictionary soap_dictionary;
  39
  40                 // See [MC-NBFS] in Microsoft OSP. The strings are copied from the PDF, so the actual values might be wrong.
  41                 static readonly string [] dict_strings = {
  42                         "mustUnderstand", "Envelope",
  43                         "http://www.w3.org/2003/05/soap-envelope",
  44                         "http://www.w3.org/2005/08/addressing", "Header", "Action", "To", "Body", "Algorithm", "RelatesTo",
  45                         "http://www.w3.org/2005/08/addressing/anonymous", "URI", "Reference", "MessageID", "Id", "Identifier",
  46                         "http://schemas.xmlsoap.org/ws/2005/02/rm", "Transforms", "Transform", "DigestMethod", "DigestValue", "Address", "ReplyTo", "SequenceAcknowledgement", "AcknowledgementRange", "Upper", "Lower", "BufferRemaining",
  47                         "http://schemas.microsoft.com/ws/2006/05/rm",
  48                         "http://schemas.xmlsoap.org/ws/2005/02/rm/SequenceAcknowledgement", "SecurityTokenReference", "Sequence", "MessageNumber",
  49                         "http://www.w3.org/2000/09/xmldsig#",
  50                         "http://www.w3.org/2000/09/xmldsig#enveloped-signature", "KeyInfo",
  51                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd",
  52                         "http://www.w3.org/2001/04/xmlenc#",
  53                         "http://schemas.xmlsoap.org/ws/2005/02/sc", "DerivedKeyToken", "Nonce", "Signature", "SignedInfo", "CanonicalizationMethod", "SignatureMethod", "SignatureValue", "DataReference", "EncryptedData", "EncryptionMethod", "CipherData", "CipherValue",
  54                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Security", "Timestamp", "Created", "Expires", "Length", "ReferenceList", "ValueType", "Type", "EncryptedHeader",
  55                         "http://docs.oasis-open.org/wss/oasis-wss-wssecurity-secext-1.1.xsd", "RequestSecurityTokenResponseCollection",
  56                         "http://schemas.xmlsoap.org/ws/2005/02/trust",
  57                         "http://schemas.xmlsoap.org/ws/2005/02/trust#BinarySecret",
  58                         "http://schemas.microsoft.com/ws/2006/02/transactions", "s", "Fault", "MustUnderstand", "role", "relay", "Code", "Reason", "Text", "Node", "Role", "Detail", "Value", "Subcode", "NotUnderstood", "qname", "", "From", "FaultTo", "EndpointReference", "PortType", "ServiceName", "PortName", "ReferenceProperties", "RelationshipType", "Reply", "a",
  59                         "http://schemas.xmlsoap.org/ws/2006/02/addressingidentity", "Identity", "Spn", "Upn", "Rsa", "Dns", "X509v3Certificate",
  60                         "http://www.w3.org/2005/08/addressing/fault", "ReferenceParameters", "IsReferenceParameter",
  61                         "http://www.w3.org/2005/08/addressing/reply",
  62                         "http://www.w3.org/2005/08/addressing/none", "Metadata",
  63                         "http://schemas.xmlsoap.org/ws/2004/08/addressing",
  64                         "http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous",
  65                         "http://schemas.xmlsoap.org/ws/2004/08/addressing/fault",
  66                         "http://schemas.xmlsoap.org/ws/2004/06/addressingex", "RedirectTo", "Via",
  67                         "http://www.w3.org/2001/10/xml-exc-c14n#", "PrefixList", "InclusiveNamespaces", "ec", "SecurityContextToken", "Generation", "Label", "Offset", "Properties", "Cookie", "wsc",
  68                         "http://schemas.xmlsoap.org/ws/2004/04/sc",
  69                         "http://schemas.xmlsoap.org/ws/2004/04/security/sc/dk",
  70                         "http://schemas.xmlsoap.org/ws/2004/04/security/sc/sct",
  71                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/RST/SCT",
  72                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/RSTR/SCT", "RenewNeeded", "BadContextToken", "c",
  73                         "http://schemas.xmlsoap.org/ws/2005/02/sc/dk",
  74                         "http://schemas.xmlsoap.org/ws/2005/02/sc/sct",
  75                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RST/SCT",
  76                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/SCT",
  77                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RST/SCT/Renew",
  78                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/SCT/Renew",
  79                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RST/SCT/Cancel",
  80                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/SCT/Cancel",
  81                         "http://www.w3.org/2001/04/xmlenc#aes128-cbc",
  82                         "http://www.w3.org/2001/04/xmlenc#kw-aes128",
  83                         "http://www.w3.org/2001/04/xmlenc#aes192-cbc",
  84                         "http://www.w3.org/2001/04/xmlenc#kw-aes192",
  85                         "http://www.w3.org/2001/04/xmlenc#aes256-cbc",
  86                         "http://www.w3.org/2001/04/xmlenc#kw-aes256",
  87                         "http://www.w3.org/2001/04/xmlenc#des-cbc",
  88                         "http://www.w3.org/2000/09/xmldsig#dsa-sha1",
  89                         "http://www.w3.org/2001/10/xml-exc-c14n#WithComments",
  90                         "http://www.w3.org/2000/09/xmldsig#hmac-sha1",
  91                         "http://www.w3.org/2001/04/xmldsig-more#hmac-sha256",
  92                         "http://schemas.xmlsoap.org/ws/2005/02/sc/dk/p_sha1",
  93                         "http://www.w3.org/2001/04/xmlenc#ripemd160",
  94                         "http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p",
  95                         "http://www.w3.org/2000/09/xmldsig#rsa-sha1",
  96                         "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256",
  97                         "http://www.w3.org/2001/04/xmlenc#rsa-1_5",
  98                         "http://www.w3.org/2000/09/xmldsig#sha1",
  99                         "http://www.w3.org/2001/04/xmlenc#sha256",
 100                         "http://www.w3.org/2001/04/xmlenc#sha512",
 101                         "http://www.w3.org/2001/04/xmlenc#tripledes-cbc",
 102                         "http://www.w3.org/2001/04/xmlenc#kw-tripledes",
 103                         "http://schemas.xmlsoap.org/2005/02/trust/tlsnego#TLS_Wrap",
 104                         "http://schemas.xmlsoap.org/2005/02/trust/spnego#GSS_Wrap",
 105                         "http://schemas.microsoft.com/ws/2006/05/security", "dnse", "o", "Password", "PasswordText", "Username", "UsernameToken", "BinarySecurityToken", "EncodingType", "KeyIdentifier",
 106                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary",
 107                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#HexBinary",
 108                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Text",
 109                         "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509SubjectKeyIdentifier",
 110                         "http://docs.oasis-open.org/wss/oasis-wss-kerberos-token-profile-1.1#GSS_Kerberosv5_AP_REQ",
 111                         "http://docs.oasis-open.org/wss/oasis-wss-kerberos-token-profile-1.1#GSS_Kerberosv5_AP_REQ1510",
 112                         "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.0#SAMLAssertionID", "Assertion", "urn:oasis:names:tc:SAML:1.0:assertion",
 113                         "http://docs.oasis-open.org/wss/oasis-wss-rel-token-profile-1.0.pdf#license", "FailedAuthentication", "InvalidSecurityToken", "InvalidSecurity", "k", "SignatureConfirmation", "TokenType",
 114                         "http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#ThumbprintSHA1",
 115                         "http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#EncryptedKey",
 116                         "http://docs.oasis-open.org/wss/oasis-wss-soap-message-security-1.1#EncryptedKeySHA1",
 117                         "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV1.1",
 118                         "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLV2.0",
 119                         "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#SAMLID", "AUTH-HASH", "RequestSecurityTokenResponse", "KeySize", "RequestedTokenReference", "AppliesTo", "Authenticator", "CombinedHash", "BinaryExchange", "Lifetime", "RequestedSecurityToken", "Entropy", "RequestedProofToken", "ComputedKey", "RequestSecurityToken", "RequestType", "Context", "BinarySecret",
 120                         "http://schemas.xmlsoap.org/ws/2005/02/trust/spnego",
 121                         "http://schemas.xmlsoap.org/ws/2005/02/trust/tlsnego", "wst",
 122                         "http://schemas.xmlsoap.org/ws/2004/04/trust",
 123                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/RST/Issue",
 124                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/RSTR/Issue",
 125                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/Issue",
 126                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/CK/PSHA1",
 127                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/SymmetricKey",
 128                         "http://schemas.xmlsoap.org/ws/2004/04/security/trust/Nonce", "KeyType",
 129                         "http://schemas.xmlsoap.org/ws/2004/04/trust/SymmetricKey",
 130                         "http://schemas.xmlsoap.org/ws/2004/04/trust/PublicKey", "Claims", "InvalidRequest", "RequestFailed", "SignWith", "EncryptWith", "EncryptionAlgorithm", "CanonicalizationAlgorithm", "ComputedKeyAlgorithm", "UseKey",
 131                         "http://schemas.microsoft.com/net/2004/07/secext/WS-SPNego",
 132                         "http://schemas.microsoft.com/net/2004/07/secext/TLSNego", "t",
 133                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RST/Issue",
 134                         "http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/Issue",
 135                         "http://schemas.xmlsoap.org/ws/2005/02/trust/Issue",
 136                         "http://schemas.xmlsoap.org/ws/2005/02/trust/SymmetricKey",
 137                         "http://schemas.xmlsoap.org/ws/2005/02/trust/CK/PSHA1",
 138                         "http://schemas.xmlsoap.org/ws/2005/02/trust/Nonce", "RenewTarget", "CancelTarget", "RequestedTokenCancelled", "RequestedAttachedReference", "RequestedUnattachedReference", "IssuedTokens",
 139                         "http://schemas.xmlsoap.org/ws/2005/02/trust/Renew",
 140                         "http://schemas.xmlsoap.org/ws/2005/02/trust/Cancel",
 141                         "http://schemas.xmlsoap.org/ws/2005/02/trust/PublicKey", "Access", "AccessDecision", "Advice", "AssertionID", "AssertionIDReference", "Attribute", "AttributeName", "AttributeNamespace", "AttributeStatement", "AttributeValue", "Audience", "AudienceRestrictionCondition", "AuthenticationInstant", "AuthenticationMethod", "AuthenticationStatement", "AuthorityBinding", "AuthorityKind", "AuthorizationDecisionStatement", "Binding", "Condition", "Conditions", "Decision", "DoNotCacheCondition", "Evidence", "IssueInstant", "Issuer", "Location", "MajorVersion", "MinorVersion", "NameIdentifier", "Format", "NameQualifier", "Namespace", "NotBefore", "NotOnOrAfter", "saml", "Statement", "Subject", "SubjectConfirmation", "SubjectConfirmationData", "ConfirmationMethod", "urn:oasis:names:tc:SAML:1.0:cm:holder-of-key", "urn:oasis:names:tc:SAML:1.0:cm:sender-vouches", "SubjectLocality", "DNSAddress", "IPAddress", "SubjectStatement", "urn:oasis:names:tc:SAML:1.0:am:unspecified", "xmlns", "Resource", "UserName", "urn:oasis:names:tc:SAML:1.1:nameid-format:WindowsDomainQualifiedName", "EmailName", "urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress", "u", "ChannelInstance",
 142                         "http://schemas.microsoft.com/ws/2005/02/duplex", "Encoding", "MimeType", "CarriedKeyName", "Recipient", "EncryptedKey", "KeyReference", "e",
 143                         "http://www.w3.org/2001/04/xmlenc#Element",
 144                         "http://www.w3.org/2001/04/xmlenc#Content", "KeyName", "MgmtData", "KeyValue", "RSAKeyValue", "Modulus", "Exponent", "X509Data", "X509IssuerSerial", "X509IssuerName", "X509SerialNumber", "X509Certificate", "AckRequested",
 145                         "http://schemas.xmlsoap.org/ws/2005/02/rm/AckRequested", "AcksTo", "Accept", "CreateSequence",
 146                         "http://schemas.xmlsoap.org/ws/2005/02/rm/CreateSequence", "CreateSequenceRefused", "CreateSequenceResponse",
 147                         "http://schemas.xmlsoap.org/ws/2005/02/rm/CreateSequenceResponse", "FaultCode", "InvalidAcknowledgement", "LastMessage",
 148                         "http://schemas.xmlsoap.org/ws/2005/02/rm/LastMessage", "LastMessageNumberExceeded", "MessageNumberRollover", "Nack", "netrm", "Offer", "r", "SequenceFault", "SequenceTerminated", "TerminateSequence",
 149                         "http://schemas.xmlsoap.org/ws/2005/02/rm/TerminateSequence", "UnknownSequence",
 150                         "http://schemas.microsoft.com/ws/2006/02/tx/oletx", "oletx", "OleTxTransaction", "PropagationToken",
 151                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor", "wscoor", "CreateCoordinationContext", "CreateCoordinationContextResponse", "CoordinationContext", "CurrentContext", "CoordinationType", "RegistrationService", "Register", "RegisterResponse", "ProtocolIdentifier", "CoordinatorProtocolService", "ParticipantProtocolService",
 152                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor/CreateCoordinationContext",
 153                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor/CreateCoordinationContextResponse",
 154                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor/Register",
 155                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor/RegisterResponse",
 156                         "http://schemas.xmlsoap.org/ws/2004/10/wscoor/fault", "ActivationCoordinatorPortType", "RegistrationCoordinatorPortType", "InvalidState", "InvalidProtocol", "InvalidParameters", "NoActivity", "ContextRefused", "AlreadyRegistered",
 157                         "http://schemas.xmlsoap.org/ws/2004/10/wsat", "wsat",
 158                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Completion",
 159                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Durable2PC",
 160                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Volatile2PC", "Prepare", "Prepared", "ReadOnly", "Commit", "Rollback", "Committed", "Aborted", "Replay",
 161                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Commit",
 162                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Rollback",
 163                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Committed",
 164                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Aborted",
 165                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Prepare",
 166                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Prepared",
 167                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/ReadOnly",
 168                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/Replay",
 169                         "http://schemas.xmlsoap.org/ws/2004/10/wsat/fault", "CompletionCoordinatorPortType", "CompletionParticipantPortType", "CoordinatorPortType", "ParticipantPortType", "InconsistentInternalState", "mstx", "Enlistment", "protocol", "LocalTransactionId", "IsolationLevel", "IsolationFlags", "Description", "Loopback", "RegisterInfo", "ContextId", "TokenId", "AccessDenied", "InvalidPolicy", "CoordinatorRegistrationFailed", "TooManyEnlistments", "Disabled", "ActivityId",
 170                         "http://schemas.microsoft.com/2004/09/ServiceModel/Diagnostics",
 171                         "http://docs.oasis-open.org/wss/oasis-wss-kerberos-token-profile-1.1#Kerberosv5APREQSHA1",
 172                         "http://schemas.xmlsoap.org/ws/2002/12/policy", "FloodMessage", "LinkUtility", "Hops",
 173                         "http://schemas.microsoft.com/net/2006/05/peer/HopCount", "PeerVia",
 174                         "http://schemas.microsoft.com/net/2006/05/peer", "PeerFlooder", "PeerTo",
 175                         "http://schemas.microsoft.com/ws/2005/05/routing", "PacketRoutable",
 176                         "http://schemas.microsoft.com/ws/2005/05/addressing/none",
 177                         "http://schemas.microsoft.com/ws/2005/05/envelope/none",
 178                         "http://www.w3.org/2001/XMLSchema-instance",
 179                         "http://www.w3.org/2001/XMLSchema", "nil", "type", "char", "boolean", "byte", "unsignedByte", "short", "unsignedShort", "int", "unsignedInt", "long", "unsignedLong", "float", "double", "decimal", "dateTime", "string", "base64Binary", "anyType", "duration", "guid", "anyURI", "QName", "time", "date", "hexBinary", "gYearMonth", "gYear", "gMonthDay", "gDay", "gMonth", "integer", "positiveInteger", "negativeInteger", "nonPositiveInteger", "nonNegativeInteger", "normalizedString", "ConnectionLimitReached",
 180                         "http://schemas.xmlsoap.org/soap/envelope/", "Actor", "Faultcode", "Faultstring", "Faultactor", "Detail"
 181                 };
 182
 183                 static BinaryMessageEncoder ()
 184                 {
 185                         var d = new XmlDictionary ();
 186                         soap_dictionary = d;
 187                         foreach (var s in dict_strings)
 188                                 d.Add (s);
 189                 }
 190
 191                 public BinaryMessageEncoder ()
 192                 {
 193                 }
 194
 195                 public BinaryMessageEncoder (BinaryMessageEncoderFactory owner, bool session)
 196                 {
 197                         this.owner = owner;
 198                         this.session = session;
 199                 }
 200
 201                 BinaryMessageEncoderFactory owner;
 202                 bool session;
 203
 204                 public override string ContentType {
 205                         get { return MediaType; }
 206                 }
 207
 208                 public override string MediaType {
 209                         get { return session ? "application/soap+msbinsession1" : "application/soap+msbin1"; }
 210                 }
 211
 212                 public override MessageVersion MessageVersion {
 213                         get { return MessageVersion.Default; }
 214                 }
 215
 216                 [MonoTODO]
 217                 public override Message ReadMessage (ArraySegment<byte> buffer,
 218                         BufferManager bufferManager, string contentType)
 219                 {
 220                         if (contentType != ContentType)
 221                                 throw new ProtocolException ("Only content type 'application/soap+msbin1' is allowed.");
 222
 223                         // FIXME: retrieve reader session and message body.
 224
 225                         throw new NotImplementedException ();
 226
 227 /*
 228                         // FIXME: use bufferManager
 229                         return Message.CreateMessage (
 230                                 XmlDictionaryReader.CreateBinaryReader (
 231                                         buffer.Array, buffer.Offset, buffer.Count,
 232                                         soap_dictionary,
 233                                         owner != null ? owner.Owner.ReaderQuotas : new XmlDictionaryReaderQuotas ()),
 234                                 int.MaxValue, MessageVersion);
 235 */
 236                 }
 237
 238                 // It is sort of nasty hack, but there is no other way to provide reader/writer session from TCP stream.
 239                 internal XmlBinaryReaderSession CurrentReaderSession { get; set; }
 240                 internal XmlBinaryWriterSession CurrentWriterSession { get; set; }
 241
 242                 public override Message ReadMessage (Stream stream,
 243                         int maxSizeOfHeaders, string contentType)
 244                 {
 245                         if (contentType != ContentType)
 246                                 throw new ProtocolException ("Only content type 'application/soap+msbin1' is allowed.");
 247
 248                         return Message.CreateMessage (
 249                                 XmlDictionaryReader.CreateBinaryReader (stream, soap_dictionary, owner != null ? owner.Owner.ReaderQuotas : new XmlDictionaryReaderQuotas (), session ? CurrentReaderSession : null),
 250                                 maxSizeOfHeaders, MessageVersion);
 251                 }
 252
 253                 public override void WriteMessage (Message message, Stream stream)
 254                 {
 255                         VerifyMessageVersion (message);
 256
 257                         message.WriteMessage (XmlDictionaryWriter.CreateBinaryWriter (stream, soap_dictionary, CurrentWriterSession));
 258                 }
 259
 260                 [MonoTODO]
 261                 public override ArraySegment<byte> WriteMessage (
 262                         Message message, int maxMessageSize,
 263                         BufferManager bufferManager, int messageOffset)
 264                 {
 265                         VerifyMessageVersion (message);
 266
 267                         throw new NotImplementedException ();
 268                 }
 269         }
 270 }