pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPNotificationObjectParser.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.object;
   9
  10 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  11 import org.opendaylight.protocol.pcep.PCEPDocumentedException;
  12 import org.opendaylight.protocol.pcep.spi.TlvHandlerRegistry;
  13 import org.opendaylight.protocol.util.ByteArray;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Object;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.ObjectHeader;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.CNotification;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.CNotificationBuilder;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.c.notification.Tlvs;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.notification.object.c.notification.TlvsBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.overload.duration.tlv.OverloadDuration;
  22
  23 import com.google.common.primitives.UnsignedBytes;
  24
  25 /**
  26  * Parser for {@link CNotification}
  27  */
  28 public class PCEPNotificationObjectParser extends AbstractObjectWithTlvsParser<CNotificationBuilder> {
  29
  30         public static final int CLASS = 12;
  31
  32         public static final int TYPE = 1;
  33
  34         /*
  35          * lengths of fields
  36          */
  37         private static final int FLAGS_F_LENGTH = 1;
  38         private static final int NT_F_LENGTH = 1;
  39         private static final int NV_F_LENGTH = 1;
  40
  41         /*
  42          * offsets of fields
  43          */
  44         private static final int FLAGS_F_OFFSET = 1;
  45         private static final int NT_F_OFFSET = FLAGS_F_OFFSET + FLAGS_F_LENGTH;
  46         private static final int NV_F_OFFSET = NT_F_OFFSET + NT_F_LENGTH;
  47         private static final int TLVS_OFFSET = NV_F_OFFSET + NV_F_LENGTH;
  48
  49         public PCEPNotificationObjectParser(final TlvHandlerRegistry tlvReg) {
  50                 super(tlvReg);
  51         }
  52
  53         @Override
  54         public CNotification parseObject(final ObjectHeader header, final byte[] bytes) throws PCEPDeserializerException,
  55                         PCEPDocumentedException {
  56                 if (bytes == null || bytes.length == 0) {
  57                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  58                 }
  59                 final CNotificationBuilder builder = new CNotificationBuilder();
  60                 builder.setIgnore(header.isIgnore());
  61                 builder.setProcessingRule(header.isProcessingRule());
  62                 builder.setType((short) UnsignedBytes.toInt(bytes[NT_F_OFFSET]));
  63                 builder.setValue((short) UnsignedBytes.toInt(bytes[NV_F_OFFSET]));
  64                 parseTlvs(builder, ByteArray.cutBytes(bytes, TLVS_OFFSET));
  65                 return builder.build();
  66         }
  67
  68         @Override
  69         public void addTlv(final CNotificationBuilder builder, final Tlv tlv) {
  70                 if (tlv instanceof OverloadDuration && builder.getType() == 2 && builder.getValue() == 1) {
  71                         builder.setTlvs(new TlvsBuilder().setOverloadDuration((OverloadDuration) tlv).build());
  72                 }
  73         }
  74
  75         @Override
  76         public byte[] serializeObject(final Object object) {
  77                 if (!(object instanceof CNotification)) {
  78                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + object.getClass() + ". Needed NotificationObject.");
  79                 }
  80                 final CNotification notObj = (CNotification) object;
  81
  82                 final byte[] tlvs = serializeTlvs(notObj.getTlvs());
  83
  84                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length + getPadding(TLVS_OFFSET + tlvs.length, PADDED_TO)];
  85                 if (tlvs.length != 0) {
  86                         ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  87                 }
  88                 retBytes[NT_F_OFFSET] = UnsignedBytes.checkedCast(notObj.getType());
  89                 retBytes[NV_F_OFFSET] = UnsignedBytes.checkedCast(notObj.getValue());
  90                 return retBytes;
  91         }
  92
  93         public byte[] serializeTlvs(final Tlvs tlvs) {
  94                 if (tlvs == null) {
  95                         return new byte[0];
  96                 } else if (tlvs.getOverloadDuration() != null) {
  97                         return serializeTlv(tlvs.getOverloadDuration());
  98                 }
  99                 return new byte[0];
 100         }
 101
 102         @Override
 103         public int getObjectType() {
 104                 return TYPE;
 105         }
 106
 107         @Override
 108         public int getObjectClass() {
 109                 return CLASS;
 110         }
 111 }