pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful07/Stateful07ErrorMessageParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.protocol.pcep.ietf.stateful07;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.ArrayList;
  13 import java.util.List;
  14
  15 import org.opendaylight.protocol.pcep.impl.message.PCEPErrorMessageParser;
  16 import org.opendaylight.protocol.pcep.spi.ObjectRegistry;
  17 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  18 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  19 import org.opendaylight.protocol.pcep.spi.UnknownObject;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcerr.pcerr.message.error.type.StatefulCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcerr.pcerr.message.error.type.stateful._case.stateful.Srps;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcerr.pcerr.message.error.type.stateful._case.stateful.SrpsBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.Srp;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcerrBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.PcerrMessage;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.Open;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcep.error.object.ErrorObject;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessageBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.Errors;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.ErrorsBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestCase;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestCaseBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionCase;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionCaseBuilder;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.RequestBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.request.Rps;
  39 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.request.RpsBuilder;
  40 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.session._case.SessionBuilder;
  41 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.rp.object.Rp;
  42
  43 /**
  44  * Parser for {@link PcerrMessage}
  45  */
  46 public final class Stateful07ErrorMessageParser extends PCEPErrorMessageParser {
  47
  48         public Stateful07ErrorMessageParser(final ObjectRegistry registry) {
  49                 super(registry);
  50         }
  51
  52         @Override
  53         public void serializeMessage(final Message message, final ByteBuf buffer) {
  54                 if (!(message instanceof PcerrMessage)) {
  55                         throw new IllegalArgumentException("Wrong instance of Message. Passed instance " + message.getClass()
  56                                         + ". Nedded ErrorMessage.");
  57                 }
  58                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessage err = ((PcerrMessage) message).getPcerrMessage();
  59
  60                 if (err.getErrors() == null || err.getErrors().isEmpty()) {
  61                         throw new IllegalArgumentException("Errors should not be empty.");
  62                 }
  63
  64                 if (err.getErrorType() instanceof RequestCase) {
  65                         final List<Rps> rps = ((RequestCase) err.getErrorType()).getRequest().getRps();
  66                         for (final Rps r : rps) {
  67                                 buffer.writeBytes(serializeObject(r.getRp()));
  68                         }
  69                 }
  70
  71                 if (err.getErrorType() instanceof StatefulCase) {
  72                         final List<Srps> srps = ((StatefulCase) err.getErrorType()).getStateful().getSrps();
  73                         for (final Srps s : srps) {
  74                                 buffer.writeBytes(serializeObject(s.getSrp()));
  75                         }
  76                 }
  77
  78                 for (final Errors e : err.getErrors()) {
  79                         buffer.writeBytes(serializeObject(e.getErrorObject()));
  80                 }
  81
  82                 if (err.getErrorType() instanceof SessionCase) {
  83                         buffer.writeBytes(serializeObject(((SessionCase) err.getErrorType()).getSession().getOpen()));
  84                 }
  85         }
  86
  87         @Override
  88         protected PcerrMessage validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  89                 if (objects == null) {
  90                         throw new IllegalArgumentException("Passed list can't be null.");
  91                 }
  92
  93                 if (objects.isEmpty()) {
  94                         throw new PCEPDeserializerException("Error message is empty.");
  95                 }
  96
  97                 final List<Rps> requestParameters = new ArrayList<>();
  98                 final List<Srps> srps = new ArrayList<>();
  99                 final List<Errors> errorObjects = new ArrayList<>();
 100                 final PcerrMessageBuilder b = new PcerrMessageBuilder();
 101
 102                 Object obj;
 103                 State state = State.Init;
 104                 obj = objects.get(0);
 105
 106                 if (obj instanceof ErrorObject) {
 107                         final ErrorObject o = (ErrorObject) obj;
 108                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 109                         state = State.ErrorIn;
 110                         objects.remove(0);
 111                 } else if (obj instanceof Rp) {
 112                         final Rp o = (Rp) obj;
 113                         if (o.isProcessingRule()) {
 114                                 errors.add(createErrorMsg(PCEPErrors.P_FLAG_NOT_SET));
 115                                 return null;
 116                         }
 117                         requestParameters.add(new RpsBuilder().setRp(o).build());
 118                         state = State.RpIn;
 119                         objects.remove(0);
 120                 } else if (obj instanceof Srp) {
 121                         final Srp s = (Srp) obj;
 122                         srps.add(new SrpsBuilder().setSrp(s).build());
 123                         state = State.SrpIn;
 124                         objects.remove(0);
 125                 }
 126
 127                 while (!objects.isEmpty()) {
 128                         obj = objects.get(0);
 129
 130                         if (obj instanceof UnknownObject) {
 131                                 return new PcerrBuilder().setPcerrMessage(b.setErrors(((UnknownObject) obj).getErrors()).build()).build();
 132                         }
 133
 134                         switch (state) {
 135                         case ErrorIn:
 136                                 state = State.Open;
 137                                 if (obj instanceof ErrorObject) {
 138                                         final ErrorObject o = (ErrorObject) obj;
 139                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 140                                         state = State.ErrorIn;
 141                                         break;
 142                                 }
 143                         case RpIn:
 144                                 state = State.Error;
 145                                 if (obj instanceof Rp) {
 146                                         final Rp o = ((Rp) obj);
 147                                         requestParameters.add(new RpsBuilder().setRp(o).build());
 148                                         state = State.RpIn;
 149                                         break;
 150                                 }
 151                         case SrpIn:
 152                                 state = State.Error;
 153                                 if (obj instanceof Srp) {
 154                                         final Srp o = ((Srp) obj);
 155                                         srps.add(new SrpsBuilder().setSrp(o).build());
 156                                         state = State.SrpIn;
 157                                         break;
 158                                 }
 159                         case Open:
 160                                 state = State.OpenIn;
 161                                 if (obj instanceof Open) {
 162                                         b.setErrorType(new SessionCaseBuilder().setSession(new SessionBuilder().setOpen((Open) obj).build()).build());
 163                                         break;
 164                                 }
 165                         case Error:
 166                                 state = State.OpenIn;
 167                                 if (obj instanceof ErrorObject) {
 168                                         final ErrorObject o = (ErrorObject) obj;
 169                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 170                                         state = State.Error;
 171                                         break;
 172                                 }
 173                         case OpenIn:
 174                                 state = State.End;
 175                                 break;
 176                         case End:
 177                                 break;
 178                         default:
 179                                 break;
 180                         }
 181                         if (!state.equals(State.End)) {
 182                                 objects.remove(0);
 183                         }
 184                 }
 185
 186                 if (errorObjects.isEmpty() && errorObjects.isEmpty()) {
 187                         throw new PCEPDeserializerException("At least one PCEPErrorObject is mandatory.");
 188                 }
 189
 190                 if (!objects.isEmpty()) {
 191                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 192                 }
 193                 if (requestParameters != null && !requestParameters.isEmpty()) {
 194                         b.setErrorType(new RequestCaseBuilder().setRequest(new RequestBuilder().setRps(requestParameters).build()).build());
 195                 }
 196
 197                 return new PcerrBuilder().setPcerrMessage(b.setErrors(errorObjects).build()).build();
 198         }
 199
 200         private enum State {
 201                 Init, ErrorIn, RpIn, SrpIn, Open, Error, OpenIn, End
 202         }
 203 }