pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/message/PCEPErrorMessageParser.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.impl.message;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.List;
  13
  14 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  15 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  16 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  17 import org.opendaylight.protocol.pcep.spi.UnknownObject;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcerrBuilder;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.PcerrMessage;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.Open;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcep.error.object.ErrorObject;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessageBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.Errors;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.ErrorsBuilder;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestCase;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestCaseBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionCase;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionCaseBuilder;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request._case.RequestBuilder;
  32 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;
  33 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;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.session._case.SessionBuilder;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.rp.object.Rp;
  36
  37 import com.google.common.collect.Lists;
  38
  39 /**
  40  * Parser for {@link PcerrMessage}
  41  */
  42 public class PCEPErrorMessageParser extends AbstractMessageParser {
  43
  44         public static final int TYPE = 6;
  45
  46         public PCEPErrorMessageParser(final ObjectHandlerRegistry registry) {
  47                 super(registry);
  48         }
  49
  50         @Override
  51         public void serializeMessage(final Message message, final ByteBuf buffer) {
  52                 if (!(message instanceof PcerrMessage)) {
  53                         throw new IllegalArgumentException("Wrong instance of Message. Passed instance " + message.getClass()
  54                                         + ". Nedded ErrorMessage.");
  55                 }
  56                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessage err = ((PcerrMessage) message).getPcerrMessage();
  57
  58                 if (err.getErrors() == null || err.getErrors().isEmpty()) {
  59                         throw new IllegalArgumentException("Errors should not be empty.");
  60                 }
  61
  62                 if (err.getErrorType() instanceof RequestCase) {
  63                         final List<Rps> rps = ((RequestCase) err.getErrorType()).getRequest().getRps();
  64                         for (final Rps r : rps) {
  65                                 buffer.writeBytes(serializeObject(r.getRp()));
  66                         }
  67                 }
  68
  69                 for (final Errors e : err.getErrors()) {
  70                         buffer.writeBytes(serializeObject(e.getErrorObject()));
  71                 }
  72
  73                 if (err.getErrorType() instanceof SessionCase) {
  74                         buffer.writeBytes(serializeObject(((SessionCase) err.getErrorType()).getSession().getOpen()));
  75                 }
  76         }
  77
  78         @Override
  79         protected PcerrMessage validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  80                 if (objects == null) {
  81                         throw new IllegalArgumentException("Passed list can't be null.");
  82                 }
  83
  84                 if (objects.isEmpty()) {
  85                         throw new PCEPDeserializerException("Error message is empty.");
  86                 }
  87
  88                 final List<Rps> requestParameters = Lists.newArrayList();
  89                 final List<Errors> errorObjects = Lists.newArrayList();
  90                 final PcerrMessageBuilder b = new PcerrMessageBuilder();
  91
  92                 Object obj;
  93                 State state = State.Init;
  94                 obj = objects.get(0);
  95
  96                 if (obj instanceof ErrorObject) {
  97                         final ErrorObject o = (ErrorObject) obj;
  98                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
  99                         state = State.ErrorIn;
 100                         objects.remove(0);
 101                 } else if (obj instanceof Rp) {
 102                         final Rp o = ((Rp) obj);
 103                         if (o.isProcessingRule()) {
 104                                 errors.add(createErrorMsg(PCEPErrors.P_FLAG_NOT_SET));
 105                                 return null;
 106                         }
 107                         requestParameters.add(new RpsBuilder().setRp(o).build());
 108                         state = State.RpIn;
 109                         objects.remove(0);
 110                 }
 111
 112                 while (!objects.isEmpty()) {
 113                         obj = objects.get(0);
 114
 115                         if (obj instanceof UnknownObject) {
 116                                 return new PcerrBuilder().setPcerrMessage(b.setErrors(((UnknownObject) obj).getErrors()).build()).build();
 117                         }
 118
 119                         switch (state) {
 120                         case ErrorIn:
 121                                 state = State.Open;
 122                                 if (obj instanceof ErrorObject) {
 123                                         final ErrorObject o = (ErrorObject) obj;
 124                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 125                                         state = State.ErrorIn;
 126                                         break;
 127                                 }
 128                         case RpIn:
 129                                 state = State.Error;
 130                                 if (obj instanceof Rp) {
 131                                         final Rp o = ((Rp) obj);
 132                                         requestParameters.add(new RpsBuilder().setRp(o).build());
 133                                         state = State.RpIn;
 134                                         break;
 135                                 }
 136                         case Open:
 137                                 state = State.OpenIn;
 138                                 if (obj instanceof Open) {
 139                                         b.setErrorType(new SessionCaseBuilder().setSession(new SessionBuilder().setOpen((Open) obj).build()).build());
 140                                         break;
 141                                 }
 142                         case Error:
 143                                 state = State.OpenIn;
 144                                 if (obj instanceof ErrorObject) {
 145                                         final ErrorObject o = (ErrorObject) obj;
 146                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 147                                         state = State.Error;
 148                                         break;
 149                                 }
 150                         case OpenIn:
 151                                 state = State.End;
 152                                 break;
 153                         case End:
 154                                 break;
 155                         default:
 156                                 break;
 157                         }
 158                         if (!state.equals(State.End)) {
 159                                 objects.remove(0);
 160                         }
 161                 }
 162
 163                 if (errorObjects.isEmpty() && errorObjects.isEmpty()) {
 164                         throw new PCEPDeserializerException("At least one PCEPErrorObject is mandatory.");
 165                 }
 166
 167                 if (!objects.isEmpty()) {
 168                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 169                 }
 170                 if (requestParameters != null && !requestParameters.isEmpty()) {
 171                         b.setErrorType(new RequestCaseBuilder().setRequest(new RequestBuilder().setRps(requestParameters).build()).build());
 172                 }
 173
 174                 return new PcerrBuilder().setPcerrMessage(b.setErrors(errorObjects).build()).build();
 175         }
 176
 177         private enum State {
 178                 Init, ErrorIn, RpIn, Open, Error, OpenIn, End
 179         }
 180
 181         @Override
 182         public int getMessageType() {
 183                 return TYPE;
 184         }
 185 }