pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/stateful07/Stateful07PCReportMessageParser.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.ietf.stateful07;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.collect.Lists;
  12 import io.netty.buffer.ByteBuf;
  13 import io.netty.buffer.Unpooled;
  14 import java.util.List;
  15 import org.opendaylight.protocol.pcep.spi.AbstractMessageParser;
  16 import org.opendaylight.protocol.pcep.spi.MessageUtil;
  17 import org.opendaylight.protocol.pcep.spi.ObjectRegistry;
  18 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  19 import org.opendaylight.protocol.pcep.spi.PCEPErrors;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.Pcrpt;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.PcrptBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.lsp.object.Lsp;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcrpt.message.PcrptMessageBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcrpt.message.pcrpt.message.Reports;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcrpt.message.pcrpt.message.ReportsBuilder;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcrpt.message.pcrpt.message.reports.Path;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.pcrpt.message.pcrpt.message.reports.PathBuilder;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.srp.object.Srp;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.bandwidth.object.Bandwidth;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Ero;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.include.route.object.Iro;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.Metrics;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lsp.attributes.MetricsBuilder;
  36 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.lspa.object.Lspa;
  37 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.metric.object.Metric;
  38 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.Rro;
  39
  40 /**
  41  * Parser for {@link Pcrpt}
  42  */
  43 public class Stateful07PCReportMessageParser extends AbstractMessageParser {
  44
  45     public static final int TYPE = 10;
  46
  47     public Stateful07PCReportMessageParser(final ObjectRegistry registry) {
  48         super(registry);
  49     }
  50
  51     @Override
  52     public void serializeMessage(final Message message, final ByteBuf out) {
  53         Preconditions.checkArgument(message instanceof Pcrpt, "Wrong instance of Message. Passed instance of %s. Need Pcrpt.", message.getClass());
  54         final Pcrpt msg = (Pcrpt) message;
  55         final List<Reports> reports = msg.getPcrptMessage().getReports();
  56         ByteBuf buffer = Unpooled.buffer();
  57         for (final Reports report : reports) {
  58             serializeReport(report, buffer);
  59         }
  60         MessageUtil.formatMessage(TYPE, buffer, out);
  61     }
  62
  63     protected void serializeReport(final Reports report, final ByteBuf buffer) {
  64         if (report.getSrp() != null) {
  65             serializeObject(report.getSrp(), buffer);
  66         }
  67         serializeObject(report.getLsp(), buffer);
  68         final Path p = report.getPath();
  69         if (p != null) {
  70             serializeObject(p.getEro(), buffer);
  71             if (p.getLspa() != null) {
  72                 serializeObject(p.getLspa(), buffer);
  73             }
  74             if (p.getBandwidth() != null) {
  75                 serializeObject(p.getBandwidth(), buffer);
  76             }
  77             if (p.getMetrics() != null && !p.getMetrics().isEmpty()) {
  78                 for (final Metrics m : p.getMetrics()) {
  79                     serializeObject(m.getMetric(), buffer);
  80                 }
  81             }
  82             if (p.getIro() != null) {
  83                 serializeObject(p.getIro(), buffer);
  84             }
  85             if (p.getRro() != null) {
  86                 serializeObject(p.getRro(), buffer);
  87             }
  88         }
  89     }
  90
  91     @Override
  92     public Message validate(final List<Object> objects, final List<Message> errors) throws PCEPDeserializerException {
  93         if (objects == null) {
  94             throw new IllegalArgumentException("Passed list can't be null.");
  95         }
  96         if (objects.isEmpty()) {
  97             throw new PCEPDeserializerException("Pcrpt message cannot be empty.");
  98         }
  99
 100         final List<Reports> reports = Lists.newArrayList();
 101
 102         while (!objects.isEmpty()) {
 103             final Reports report = getValidReports(objects, errors);
 104             if (report != null) {
 105                 reports.add(report);
 106             }
 107         }
 108         return new PcrptBuilder().setPcrptMessage(new PcrptMessageBuilder().setReports(reports).build()).build();
 109     }
 110
 111     protected Reports getValidReports(final List<Object> objects, final List<Message> errors) {
 112         boolean isValid = true;
 113         final ReportsBuilder builder = new ReportsBuilder();
 114         if (objects.get(0) instanceof Srp) {
 115             builder.setSrp((Srp) objects.get(0));
 116             objects.remove(0);
 117         }
 118         if (objects.get(0) instanceof Lsp) {
 119             builder.setLsp((Lsp) objects.get(0));
 120             objects.remove(0);
 121         } else {
 122             errors.add(createErrorMsg(PCEPErrors.LSP_MISSING));
 123             isValid = false;
 124         }
 125         if (!objects.isEmpty()) {
 126             final PathBuilder pBuilder = new PathBuilder();
 127             if (objects.get(0) instanceof Ero) {
 128                 pBuilder.setEro((Ero) objects.get(0));
 129                 objects.remove(0);
 130             } else {
 131                 errors.add(createErrorMsg(PCEPErrors.ERO_MISSING));
 132                 isValid = false;
 133             }
 134             parsePath(objects, pBuilder);
 135             builder.setPath(pBuilder.build());
 136         }
 137         if(isValid) {
 138             return builder.build();
 139         }
 140         return null;
 141     }
 142
 143     private void parsePath(final List<Object> objects, final PathBuilder builder) {
 144         final List<Metrics> pathMetrics = Lists.newArrayList();
 145         Object obj;
 146         State state = State.Init;
 147         while (!objects.isEmpty() && !state.equals(State.End)) {
 148             obj = objects.get(0);
 149             switch (state) {
 150             case Init:
 151                 state = State.LspaIn;
 152                 if (obj instanceof Lspa) {
 153                     builder.setLspa((Lspa) obj);
 154                     break;
 155                 }
 156             case LspaIn:
 157                 state = State.BandwidthIn;
 158                 if (obj instanceof Bandwidth) {
 159                     builder.setBandwidth((Bandwidth) obj);
 160                     break;
 161                 }
 162             case BandwidthIn:
 163                 state = State.MetricIn;
 164                 if (obj instanceof Metric) {
 165                     pathMetrics.add(new MetricsBuilder().setMetric((Metric) obj).build());
 166                     state = State.BandwidthIn;
 167                     break;
 168                 }
 169             case MetricIn:
 170                 state = State.IroIn;
 171                 if (obj instanceof Iro) {
 172                     builder.setIro((Iro) obj);
 173                     break;
 174                 }
 175             case IroIn:
 176                 state = State.RroIn;
 177                 if (obj instanceof Rro) {
 178                     builder.setRro((Rro) obj);
 179                     break;
 180                 }
 181             case RroIn:
 182                 state = State.End;
 183                 break;
 184             case End:
 185                 break;
 186             }
 187             if (!state.equals(State.End)) {
 188                 objects.remove(0);
 189             }
 190         }
 191         if (!pathMetrics.isEmpty()) {
 192             builder.setMetrics(pathMetrics);
 193         }
 194     }
 195
 196     private enum State {
 197         Init, LspaIn, BandwidthIn, MetricIn, IroIn, RroIn, End
 198     }
 199 }