pcep/ietf-stateful02/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful02/Stateful02PCUpdateRequestMessageParser.java

   1 /*
   2  * Copyright (c) 2014 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.ietf.stateful02;
   9
  10 import io.netty.buffer.ByteBuf;
  11
  12 import java.util.List;
  13
  14 import org.opendaylight.protocol.pcep.spi.AbstractMessageParser;
  15 import org.opendaylight.protocol.pcep.spi.ObjectHandlerRegistry;
  16 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  17 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.Pcupd;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.PcupdBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.lsp.object.Lsp;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.PcupdMessageBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.Updates;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.UpdatesBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.updates.Path;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.pcupd.message.pcupd.message.updates.PathBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.Bandwidth;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.include.route.object.Iro;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.Metrics;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.MetricsBuilder;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.metric.object.Metric;
  35
  36 import com.google.common.collect.Lists;
  37
  38 /**
  39  * Parser for {@link Pcupd}
  40  */
  41 public final class Stateful02PCUpdateRequestMessageParser extends AbstractMessageParser {
  42
  43         public static final int TYPE = 11;
  44
  45         public Stateful02PCUpdateRequestMessageParser(final ObjectHandlerRegistry registry) {
  46                 super(registry);
  47         }
  48
  49         @Override
  50         public void serializeMessage(final Message message, final ByteBuf buffer) {
  51                 if (!(message instanceof Pcupd)) {
  52                         throw new IllegalArgumentException("Wrong instance of PCEPMessage. Passed instance of " + message.getClass()
  53                                         + ". Nedded PcupdMessage.");
  54                 }
  55                 final Pcupd msg = (Pcupd) message;
  56                 final List<Updates> updates = msg.getPcupdMessage().getUpdates();
  57                 for (final Updates update : updates) {
  58                         buffer.writeBytes(serializeObject(update.getLsp()));
  59                         final Path p = update.getPath();
  60                         if (p != null) {
  61                                 buffer.writeBytes(serializeObject(p.getEro()));
  62                                 if (p.getLspa() != null) {
  63                                         buffer.writeBytes(serializeObject(p.getLspa()));
  64                                 }
  65                                 if (p.getBandwidth() != null) {
  66                                         buffer.writeBytes(serializeObject(p.getBandwidth()));
  67                                 }
  68                                 if (p.getMetrics() != null && !p.getMetrics().isEmpty()) {
  69                                         for (final Metrics m : p.getMetrics()) {
  70                                                 buffer.writeBytes(serializeObject(m.getMetric()));
  71                                         }
  72                                 }
  73                                 if (p.getIro() != null) {
  74                                         buffer.writeBytes(serializeObject(p.getIro()));
  75                                 }
  76                         }
  77                 }
  78         }
  79
  80         @Override
  81         protected Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  82                 if (objects == null) {
  83                         throw new IllegalArgumentException("Passed list can't be null.");
  84                 }
  85                 if (objects.isEmpty()) {
  86                         throw new PCEPDeserializerException("Pcup message cannot be empty.");
  87                 }
  88
  89                 final List<Updates> updateRequests = Lists.newArrayList();
  90
  91                 while (!objects.isEmpty()) {
  92                         final Updates update = getValidUpdates(objects, errors);
  93                         if (update != null) {
  94                                 updateRequests.add(update);
  95                         }
  96                 }
  97                 if (!objects.isEmpty()) {
  98                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
  99                 }
 100                 return new PcupdBuilder().setPcupdMessage(new PcupdMessageBuilder().setUpdates(updateRequests).build()).build();
 101         }
 102
 103         private Updates getValidUpdates(final List<Object> objects, final List<Message> errors) {
 104                 final UpdatesBuilder builder = new UpdatesBuilder();
 105                 if (objects.get(0) instanceof Lsp) {
 106                         builder.setLsp((Lsp) objects.get(0));
 107                         objects.remove(0);
 108                 } else {
 109                         errors.add(createErrorMsg(PCEPErrors.LSP_MISSING));
 110                         return null;
 111                 }
 112                 if (!objects.isEmpty()) {
 113                         final PathBuilder pBuilder = new PathBuilder();
 114                         if (objects.get(0) instanceof Ero) {
 115                                 pBuilder.setEro((Ero) objects.get(0));
 116                                 objects.remove(0);
 117                         } else {
 118                                 errors.add(createErrorMsg(PCEPErrors.ERO_MISSING));
 119                                 return null;
 120                         }
 121                         parsePath(objects, pBuilder);
 122                         builder.setPath(pBuilder.build());
 123                 }
 124                 return builder.build();
 125         }
 126
 127         private void parsePath(final List<Object> objects, final PathBuilder pBuilder) {
 128                 final List<Metrics> pathMetrics = Lists.newArrayList();
 129                 Object obj;
 130                 State state = State.Init;
 131                 while (!objects.isEmpty() && !state.equals(State.End)) {
 132                         obj = objects.get(0);
 133                         switch (state) {
 134                         case Init:
 135                                 state = State.LspaIn;
 136                                 if (obj instanceof Lspa) {
 137                                         pBuilder.setLspa((Lspa) obj);
 138                                         break;
 139                                 }
 140                         case LspaIn:
 141                                 state = State.BandwidthIn;
 142                                 if (obj instanceof Bandwidth) {
 143                                         pBuilder.setBandwidth((Bandwidth) obj);
 144                                         break;
 145                                 }
 146                         case BandwidthIn:
 147                                 state = State.MetricIn;
 148                                 if (obj instanceof Metric) {
 149                                         pathMetrics.add(new MetricsBuilder().setMetric((Metric) obj).build());
 150                                         state = State.BandwidthIn;
 151                                         break;
 152                                 }
 153                         case MetricIn:
 154                                 state = State.IroIn;
 155                                 if (obj instanceof Iro) {
 156                                         pBuilder.setIro((Iro) obj);
 157                                         break;
 158                                 }
 159                         case IroIn:
 160                                 state = State.End;
 161                                 break;
 162                         case End:
 163                                 break;
 164                         }
 165                         if (!state.equals(State.End)) {
 166                                 objects.remove(0);
 167                         }
 168                 }
 169                 if (!pathMetrics.isEmpty()) {
 170                         pBuilder.setMetrics(pathMetrics);
 171                 }
 172         }
 173
 174         private enum State {
 175                 Init, LspaIn, BandwidthIn, MetricIn, IroIn, End
 176         }
 177
 178         @Override
 179         public int getMessageType() {
 180                 return TYPE;
 181         }
 182 }