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