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.Arrays;
  13 import java.util.List;
  14
  15 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  16 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  17 import org.opendaylight.protocol.pcep.PCEPErrorMapping;
  18 import org.opendaylight.protocol.pcep.PCEPErrors;
  19 import org.opendaylight.protocol.pcep.UnknownObject;
  20 import org.opendaylight.protocol.pcep.impl.AbstractMessageParser;
  21 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.message.rev131007.PcerrBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.PcerrMessage;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.open.object.Open;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcep.error.object.ErrorObject;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcep.error.object.ErrorObjectBuilder;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessageBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.Errors;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.ErrorsBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.Request;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.RequestBuilder;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.Session;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.SessionBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request.Rps;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.pcerr.message.error.type.request.RpsBuilder;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.rp.object.Rp;
  39
  40 import com.google.common.collect.Lists;
  41
  42 /**
  43  * Parser for {@link PcerrMessage}
  44  */
  45 public class PCEPErrorMessageParser extends AbstractMessageParser {
  46
  47         public static final int TYPE = 6;
  48
  49         public PCEPErrorMessageParser(final ObjectHandlerRegistry registry) {
  50                 super(registry);
  51         }
  52
  53         @Override
  54         public void serializeMessage(final Message message, final ByteBuf buffer) {
  55                 if (!(message instanceof PcerrMessage)) {
  56                         throw new IllegalArgumentException("Wrong instance of Message. Passed instance " + message.getClass()
  57                                         + ". Nedded ErrorMessage.");
  58                 }
  59                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessage err = ((PcerrMessage) message).getPcerrMessage();
  60
  61                 if (err.getErrors() == null || err.getErrors().isEmpty()) {
  62                         throw new IllegalArgumentException("Errors should not be empty.");
  63                 }
  64
  65                 if (err.getErrorType() instanceof Request) {
  66                         final List<Rps> rps = ((Request) err.getErrorType()).getRps();
  67                         for (final Rps r : rps) {
  68                                 buffer.writeBytes(serializeObject(r.getRp()));
  69                         }
  70                 }
  71
  72                 for (final Errors e : err.getErrors()) {
  73                         buffer.writeBytes(serializeObject(e.getErrorObject()));
  74                 }
  75
  76                 if (err.getErrorType() instanceof Session) {
  77                         buffer.writeBytes(serializeObject(((Session) err.getErrorType()).getOpen()));
  78                 }
  79         }
  80
  81         @Override
  82         public Message parseMessage(final byte[] buffer) throws PCEPDeserializerException, PCEPDocumentedException {
  83                 if (buffer == null || buffer.length == 0) {
  84                         throw new PCEPDeserializerException("Error message is empty.");
  85                 }
  86                 final List<Object> objs = parseObjects(buffer);
  87                 PcerrMessage m = null;
  88                 try {
  89                         m = validate(objs);
  90                 } catch (final PCEPDocumentedException e) {
  91                         final PCEPErrorMapping maping = PCEPErrorMapping.getInstance();
  92                         return new PcerrBuilder().setPcerrMessage(
  93                                         new PcerrMessageBuilder().setErrors(
  94                                                         Arrays.asList(new ErrorsBuilder().setErrorObject(
  95                                                                         new ErrorObjectBuilder().setType(maping.getFromErrorsEnum(e.getError()).type).setValue(
  96                                                                                         maping.getFromErrorsEnum(e.getError()).value).build()).build())).build()).build();
  97                 }
  98                 return m;
  99         }
 100
 101         private PcerrMessage validate(final List<Object> objects) throws PCEPDeserializerException, PCEPDocumentedException {
 102                 if (objects == null) {
 103                         throw new IllegalArgumentException("Passed list can't be null.");
 104                 }
 105
 106                 Open openObj = null;
 107                 final List<Rps> requestParameters = Lists.newArrayList();
 108                 final List<Errors> errorObjects = Lists.newArrayList();
 109                 final PcerrMessageBuilder b = new PcerrMessageBuilder();
 110
 111                 Object obj;
 112                 int state = 0;
 113                 while (!objects.isEmpty()) {
 114                         obj = objects.get(0);
 115
 116                         if (obj instanceof UnknownObject) {
 117                                 return new PcerrBuilder().setPcerrMessage(b.setErrors(((UnknownObject) obj).getErrors()).build()).build();
 118                         }
 119
 120                         if (state == 0) {
 121                                 if (obj instanceof ErrorObject) {
 122                                         final ErrorObject o = (ErrorObject) obj;
 123                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 124                                         state = 1;
 125                                         objects.remove(0);
 126                                         continue;
 127                                 } else if (obj instanceof Rp) {
 128                                         final Rp o = ((Rp) obj);
 129                                         if (o.isProcessingRule()) {
 130                                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
 131                                         }
 132                                         requestParameters.add(new RpsBuilder().setRp(o).build());
 133                                         state = 2;
 134                                         objects.remove(0);
 135                                         continue;
 136                                 }
 137                         }
 138
 139                         switch (state) {
 140                         case 1:
 141                                 if (obj instanceof ErrorObject) {
 142                                         final ErrorObject o = (ErrorObject) obj;
 143                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 144                                         state = 1;
 145                                         break;
 146                                 }
 147                                 state = 3;
 148                         case 2:
 149                                 if (obj instanceof Rp) {
 150                                         final Rp o = ((Rp) obj);
 151                                         if (o.isProcessingRule()) {
 152                                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
 153                                         }
 154                                         requestParameters.add(new RpsBuilder().setRp(o).build());
 155                                         state = 2;
 156                                         break;
 157                                 }
 158                                 state = 4;
 159                         case 3:
 160                                 if (obj instanceof Open) {
 161                                         openObj = (Open) obj;
 162                                         state = 5;
 163                                         break;
 164                                 }
 165                         case 4:
 166                                 if (obj instanceof ErrorObject) {
 167                                         final ErrorObject o = (ErrorObject) obj;
 168                                         errorObjects.add(new ErrorsBuilder().setErrorObject(o).build());
 169                                         state = 4;
 170                                         break;
 171                                 }
 172                                 state = 5;
 173
 174                                 if (state == 5) {
 175                                         break;
 176                                 }
 177                         }
 178
 179                         objects.remove(0);
 180                 }
 181
 182                 if (errorObjects.isEmpty() && errorObjects.isEmpty()) {
 183                         throw new PCEPDeserializerException("At least one PCEPErrorObject is mandatory.");
 184                 }
 185
 186                 if (!objects.isEmpty()) {
 187                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 188                 }
 189                 if (requestParameters != null) {
 190                         b.setErrorType(new RequestBuilder().setRps(requestParameters).build());
 191                 }
 192                 if (openObj != null) {
 193                         b.setErrorType(new SessionBuilder().setOpen(openObj).build());
 194                 }
 195
 196                 return new PcerrBuilder().setPcerrMessage(b.setErrors(errorObjects).build()).build();
 197         }
 198
 199         @Override
 200         public int getMessageType() {
 201                 return TYPE;
 202         }
 203 }