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.spi.AbstractMessageParser;
  21 import org.opendaylight.protocol.pcep.spi.HandlerRegistry;
  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.OpenObject;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.PcepErrorObject;
  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.RpObject;
  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.session.Open;
  38
  39 import com.google.common.collect.Lists;
  40
  41 /**
  42  * Parser for {@link PcerrMessage}
  43  */
  44 public class PCEPErrorMessageParser extends AbstractMessageParser {
  45
  46         public final int TYPE = 6;
  47
  48         public PCEPErrorMessageParser(final HandlerRegistry 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                 final org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.pcerr.message.PcerrMessage err = ((PcerrMessage) message).getPcerrMessage();
  58
  59                 if (err.getErrors() == null || err.getErrors().isEmpty())
  60                         throw new IllegalArgumentException("Errors should not be empty.");
  61
  62                 if (err.getErrorType() instanceof Request) {
  63                         final List<Rps> rps = ((Request) err.getErrorType()).getRps();
  64                         for (final Rps r : rps) {
  65                                 buffer.writeBytes(serializeObject(r));
  66                         }
  67                 }
  68
  69                 for (final Errors e : err.getErrors()) {
  70                         buffer.writeBytes(serializeObject(e));
  71                 }
  72
  73                 if (err.getErrorType() instanceof Session) {
  74                         buffer.writeBytes(serializeObject(((Session) err.getErrorType()).getOpen()));
  75                 }
  76         }
  77
  78         @Override
  79         public PcerrMessage parseMessage(final byte[] buffer) throws PCEPDeserializerException, PCEPDocumentedException {
  80                 if (buffer == null || buffer.length == 0) {
  81                         throw new PCEPDeserializerException("Error message is empty.");
  82                 }
  83                 final List<Object> objs = parseObjects(buffer);
  84                 PcerrMessage m = null;
  85                 try {
  86                         m = validate(objs);
  87                 } catch (final PCEPDocumentedException e) {
  88                         final PCEPErrorMapping maping = PCEPErrorMapping.getInstance();
  89                         return new PcerrBuilder().setPcerrMessage(
  90                                         new PcerrMessageBuilder().setErrors(
  91                                                         Arrays.asList(new ErrorsBuilder().setType(maping.getFromErrorsEnum(e.getError()).type).setValue(
  92                                                                         maping.getFromErrorsEnum(e.getError()).value).build())).build()).build();
  93                 }
  94                 return m;
  95         }
  96
  97         private PcerrMessage validate(final List<Object> objects) throws PCEPDeserializerException, PCEPDocumentedException {
  98                 if (objects == null)
  99                         throw new IllegalArgumentException("Passed list can't be null.");
 100
 101                 Open openObj = null;
 102                 final List<Rps> requestParameters = Lists.newArrayList();
 103                 final List<Errors> errorObjects = Lists.newArrayList();
 104                 final PcerrMessageBuilder b = new PcerrMessageBuilder();
 105
 106                 Object obj;
 107                 int state = 1;
 108                 while (!objects.isEmpty()) {
 109                         obj = objects.get(0);
 110
 111                         if (obj instanceof UnknownObject)
 112                                 return new PcerrBuilder().setPcerrMessage(b.setErrors(((UnknownObject) obj).getErrors()).build()).build();
 113
 114                         switch (state) {
 115                         case 1:
 116                                 if (obj instanceof PcepErrorObject) {
 117                                         final PcepErrorObject o = (PcepErrorObject) obj;
 118                                         errorObjects.add((Errors) o);
 119                                         break;
 120                                 }
 121                                 state = 2;
 122                         case 2:
 123                                 state = 3;
 124                                 if (obj instanceof OpenObject) {
 125                                         openObj = (Open) obj;
 126                                         break;
 127                                 }
 128                         case 3:
 129                                 while (!objects.isEmpty()) {
 130                                         switch (state) {
 131                                         case 1:
 132                                                 state = 2;
 133                                                 if (obj instanceof RpObject) {
 134                                                         final RpObject o = ((RpObject) obj);
 135                                                         if (o.isProcessingRule())
 136                                                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
 137                                                         requestParameters.add((Rps) o);
 138                                                         state = 1;
 139                                                         break;
 140                                                 }
 141                                         case 2:
 142                                                 if (obj instanceof PcepErrorObject) {
 143                                                         final PcepErrorObject o = (PcepErrorObject) obj;
 144                                                         errorObjects.add((Errors) o);
 145                                                         state = 2;
 146                                                         break;
 147                                                 }
 148                                                 state = 3;
 149                                         }
 150
 151                                         if (state == 3)
 152                                                 break;
 153
 154                                         objects.remove(0);
 155                                 }
 156
 157                                 state = 4;
 158                                 break;
 159                         }
 160
 161                         if (state == 4) {
 162                                 break;
 163                         }
 164
 165                         objects.remove(0);
 166                 }
 167
 168                 if (errorObjects.isEmpty() && errorObjects.isEmpty())
 169                         throw new PCEPDeserializerException("At least one PCEPErrorObject is mandatory.");
 170
 171                 if (!objects.isEmpty())
 172                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
 173                 if (requestParameters != null)
 174                         b.setErrorType(new RequestBuilder().setRps(requestParameters).build());
 175                 if (openObj != null)
 176                         b.setErrorType(new SessionBuilder().setOpen(openObj).build());
 177
 178                 return new PcerrBuilder().setPcerrMessage(b.setErrors(errorObjects).build()).build();
 179         }
 180
 181         @Override
 182         public int getMessageType() {
 183                 return this.TYPE;
 184         }
 185 }