pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/message/PCEPNotificationMessageValidator.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 java.util.ArrayList;
  11 import java.util.Arrays;
  12 import java.util.List;
  13
  14 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  15 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  16 import org.opendaylight.protocol.pcep.PCEPErrors;
  17 import org.opendaylight.protocol.pcep.PCEPObject;
  18 import org.opendaylight.protocol.pcep.impl.PCEPMessageValidator;
  19 import org.opendaylight.protocol.pcep.impl.object.UnknownObject;
  20 import org.opendaylight.protocol.pcep.message.PCEPErrorMessage;
  21 import org.opendaylight.protocol.pcep.message.PCEPNotificationMessage;
  22 import org.opendaylight.protocol.pcep.object.CompositeNotifyObject;
  23 import org.opendaylight.protocol.pcep.object.PCEPErrorObject;
  24 import org.opendaylight.protocol.pcep.object.PCEPNotificationObject;
  25 import org.opendaylight.protocol.pcep.object.PCEPRequestParameterObject;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Message;
  27
  28 /**
  29  * PCEPNotificationMessage validator. Validates message integrity.
  30  */
  31 public class PCEPNotificationMessageValidator extends PCEPMessageValidator {
  32
  33         @Override
  34         public List<Message> validate(final List<PCEPObject> objects) throws PCEPDeserializerException {
  35                 if (objects == null)
  36                         throw new IllegalArgumentException("Passed list can't be null.");
  37
  38                 final List<CompositeNotifyObject> compositeNotifications = new ArrayList<CompositeNotifyObject>();
  39
  40                 while (!objects.isEmpty()) {
  41                         CompositeNotifyObject comObj;
  42                         try {
  43                                 comObj = getValidNotificationComposite(objects);
  44                         } catch (final PCEPDocumentedException e) {
  45                                 return Arrays.asList((Message) new PCEPErrorMessage(new PCEPErrorObject(e.getError())));
  46                         }
  47
  48                         if (comObj == null)
  49                                 break;
  50
  51                         compositeNotifications.add(comObj);
  52                 }
  53
  54                 if (compositeNotifications.isEmpty())
  55                         throw new PCEPDeserializerException("Atleast one CompositeNotifiObject is mandatory.");
  56
  57                 if (!objects.isEmpty())
  58                         throw new PCEPDeserializerException("Unprocessed Objects: " + objects);
  59
  60                 return Arrays.asList((Message) new PCEPNotificationMessage(compositeNotifications));
  61         }
  62
  63         private static CompositeNotifyObject getValidNotificationComposite(final List<PCEPObject> objects) throws PCEPDocumentedException {
  64                 final List<PCEPRequestParameterObject> requestParameters = new ArrayList<PCEPRequestParameterObject>();
  65                 final List<PCEPNotificationObject> notifications = new ArrayList<PCEPNotificationObject>();
  66                 PCEPObject obj;
  67
  68                 int state = 1;
  69                 while (!objects.isEmpty()) {
  70                         obj = objects.get(0);
  71
  72                         if (obj instanceof UnknownObject)
  73                                 throw new PCEPDocumentedException("Unknown object", ((UnknownObject) obj).getError());
  74
  75                         switch (state) {
  76                         case 1:
  77                                 state = 2;
  78                                 if (obj instanceof PCEPRequestParameterObject) {
  79                                         if (((PCEPRequestParameterObject) obj).isProcessed())
  80                                                 throw new PCEPDocumentedException("Invalid setting of P flag.", PCEPErrors.P_FLAG_NOT_SET);
  81                                         requestParameters.add((PCEPRequestParameterObject) obj);
  82                                         state = 1;
  83                                         break;
  84                                 }
  85                         case 2:
  86                                 if (obj instanceof PCEPNotificationObject) {
  87                                         notifications.add((PCEPNotificationObject) obj);
  88                                         state = 2;
  89                                         break;
  90                                 }
  91                                 state = 3;
  92                         }
  93
  94                         if (state == 3)
  95                                 break;
  96
  97                         objects.remove(obj);
  98                 }
  99
 100                 if (notifications.isEmpty())
 101                         return null;
 102
 103                 return new CompositeNotifyObject(requestParameters, notifications);
 104         }
 105 }