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.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  16 import org.opendaylight.protocol.pcep.PCEPErrors;
  17 import org.opendaylight.protocol.pcep.UnknownObject;
  18 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcerrBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.PcerrMessage;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.Open;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcep.error.object.ErrorObject;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessageBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.Errors;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.ErrorsBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.Request;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.Session;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.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.RpsBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.rp.object.Rp;
  35
  36 import com.google.common.collect.Lists;
  37
  38 /**
  39  * Parser for {@link PcerrMessage}
  40  */
  41 public class PCEPErrorMessageParser extends AbstractMessageParser {
  42
  43         public static final int TYPE = 6;
  44
  45         public PCEPErrorMessageParser(final ObjectHandlerRegistry registry) {
  46                 super(registry);
  47         }
  48
  49         @Override
  50         public void serializeMessage(final Message message, final ByteBuf buffer) {
  51                 if (!(message instanceof PcerrMessage)) {
  52                         throw new IllegalArgumentException("Wrong instance of Message. Passed instance " + message.getClass()
  53                                         + ". Nedded ErrorMessage.");
  54                 }
  55                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessage err = ((PcerrMessage) message).getPcerrMessage();
  56
  57                 if (err.getErrors() == null || err.getErrors().isEmpty()) {
  58                         throw new IllegalArgumentException("Errors should not be empty.");
  59                 }
  60
  61                 if (err.getErrorType() instanceof Request) {
  62                         final List<Rps> rps = ((Request) err.getErrorType()).getRps();
  63                         for (final Rps r : rps) {
  64                                 buffer.writeBytes(serializeObject(r.getRp()));
  65                         }
  66                 }
  67
  68                 for (final Errors e : err.getErrors()) {
  69                         buffer.writeBytes(serializeObject(e.getErrorObject()));
  70                 }
  71
  72                 if (err.getErrorType() instanceof Session) {
  73                         buffer.writeBytes(serializeObject(((Session) err.getErrorType()).getOpen()));
  74                 }
  75         }
  76
  77         @Override
  78         protected PcerrMessage validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException, PCEPDocumentedException {
  79                 if (objects == null) {
  80                         throw new IllegalArgumentException("Passed list can't be null.");
  81                 }
  82
  83                 if (objects.isEmpty()) {
  84                         throw new PCEPDeserializerException("Error message is empty.");
  85                 }
  86
  87                 final List<Rps> requestParameters = Lists.newArrayList();
  88                 final List<Errors> errorObjects = Lists.newArrayList();
  89                 final PcerrMessageBuilder b = new PcerrMessageBuilder();
  90
  91                 Object obj;
  92                 State state = State.Init;
  93                 obj = objects.get(0);
  94
  95                 if (obj instanceof ErrorObject) {
  96                         final ErrorObject o = (ErrorObject) obj;
  97                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
  98                         state = State.ErrorIn;
  99                         objects.remove(0);
 100                 } else if (obj instanceof Rp) {
 101                         final Rp o = ((Rp) obj);
 102                         if (o.isProcessingRule()) {
 103                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
 104                         }
 105                         requestParameters.add(new RpsBuilder().setRp(o).build());
 106                         state = State.RpIn;
 107                         objects.remove(0);
 108                 }
 109
 110                 while (!objects.isEmpty()) {
 111                         obj = objects.get(0);
 112
 113                         if (obj instanceof UnknownObject) {
 114                                 return new PcerrBuilder().setPcerrMessage(b.setErrors(((UnknownObject) obj).getErrors()).build()).build();
 115                         }
 116
 117                         switch (state) {
 118                         case ErrorIn:
 119                                 state = State.Open;
 120                                 if (obj instanceof ErrorObject) {
 121                                         final ErrorObject o = (ErrorObject) obj;
 122                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 123                                         state = State.ErrorIn;
 124                                         break;
 125                                 }
 126                         case RpIn:
 127                                 state = State.Error;
 128                                 if (obj instanceof Rp) {
 129                                         final Rp o = ((Rp) obj);
 130                                         if (o.isProcessingRule()) {
 131                                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
 132                                         }
 133                                         requestParameters.add(new RpsBuilder().setRp(o).build());
 134                                         state = State.RpIn;
 135                                         break;
 136                                 }
 137                         case Open:
 138                                 state = State.OpenIn;
 139                                 if (obj instanceof Open) {
 140                                         b.setErrorType(new SessionBuilder().setOpen((Open) obj).build());
 141                                         break;
 142                                 }
 143                         case Error:
 144                                 state = State.OpenIn;
 145                                 if (obj instanceof ErrorObject) {
 146                                         final ErrorObject o = (ErrorObject) obj;
 147                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 148                                         state = State.Error;
 149                                         break;
 150                                 }
 151                         case OpenIn:
 152                                 state = State.End;
 153                                 break;
 154                         case End:
 155                                 break;
 156                         default:
 157                                 break;
 158                         }
 159                         if (!state.equals(State.End)) {
 160                                 objects.remove(0);
 161                         }
 162                 }
 163
 164                 if (errorObjects.isEmpty() && errorObjects.isEmpty()) {
 165                         throw new PCEPDeserializerException("At least one PCEPErrorObject is mandatory.");
 166                 }
 167
 168                 if (!objects.isEmpty()) {
 169                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 170                 }
 171                 if (requestParameters != null && !requestParameters.isEmpty()) {
 172                         b.setErrorType(new RequestBuilder().setRps(requestParameters).build());
 173                 }
 174
 175                 return new PcerrBuilder().setPcerrMessage(b.setErrors(errorObjects).build()).build();
 176         }
 177
 178         private enum State {
 179                 Init, ErrorIn, RpIn, Open, Error, OpenIn, End
 180         }
 181
 182         @Override
 183         public int getMessageType() {
 184                 return TYPE;
 185         }
 186 }