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