pcep/ietf-stateful02/src/main/java/org/opendaylight/protocol/pcep/crabbe/initiated00/PCEStatefulCapabilityTlvParser.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.crabbe.initiated00;
   9
  10 import java.util.BitSet;
  11
  12 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.spi.TlvParser;
  14 import org.opendaylight.protocol.pcep.spi.TlvSerializer;
  15 import org.opendaylight.protocol.util.ByteArray;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.initiated._00.rev140113.Stateful1;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.initiated._00.rev140113.Stateful1Builder;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.stateful.capability.tlv.Stateful;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.stateful._02.rev140110.stateful.capability.tlv.StatefulBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.Tlv;
  21
  22 /**
  23  * Parser for {@link Stateful}
  24  */
  25 public final class PCEStatefulCapabilityTlvParser implements TlvParser, TlvSerializer {
  26
  27         public static final int TYPE = 16;
  28
  29         private static final int FLAGS_F_LENGTH = 4;
  30
  31         private static final int I_FLAG_OFFSET = 29;
  32         private static final int S_FLAG_OFFSET = 30;
  33         private static final int U_FLAG_OFFSET = 31;
  34
  35         @Override
  36         public Stateful parseTlv(final byte[] buffer) throws PCEPDeserializerException {
  37                 if (buffer == null || buffer.length == 0) {
  38                         throw new IllegalArgumentException("Value bytes array is mandatory. Can't be null or empty.");
  39                 }
  40                 if (buffer.length < FLAGS_F_LENGTH) {
  41                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: >= "
  42                                         + FLAGS_F_LENGTH + ".");
  43                 }
  44
  45                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(buffer, 0, FLAGS_F_LENGTH));
  46
  47                 final StatefulBuilder sb = new StatefulBuilder();
  48                 sb.setIncludeDbVersion(flags.get(S_FLAG_OFFSET));
  49                 sb.setLspUpdateCapability(flags.get(U_FLAG_OFFSET));
  50
  51                 if (flags.get(I_FLAG_OFFSET)) {
  52                         sb.addAugmentation(Stateful1.class, new Stateful1Builder().setInitiation(Boolean.TRUE).build());
  53                 }
  54
  55                 return sb.build();
  56         }
  57
  58         @Override
  59         public byte[] serializeTlv(final Tlv tlv) {
  60                 if (tlv == null) {
  61                         throw new IllegalArgumentException("StatefulCapabilityTlv is mandatory.");
  62                 }
  63                 final Stateful sct = (Stateful) tlv;
  64
  65                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  66
  67                 final Stateful1 sfi = sct.getAugmentation(Stateful1.class);
  68                 if (sfi != null) {
  69                         flags.set(I_FLAG_OFFSET, sfi.isInitiation());
  70                 }
  71                 if (sct.isLspUpdateCapability() != null && sct.isLspUpdateCapability()) {
  72                         flags.set(U_FLAG_OFFSET, sct.isLspUpdateCapability());
  73                 }
  74                 if (sct.isIncludeDbVersion() != null && sct.isIncludeDbVersion()) {
  75                         flags.set(S_FLAG_OFFSET, sct.isIncludeDbVersion());
  76                 }
  77                 return ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH);
  78         }
  79
  80         @Override
  81         public int getType() {
  82                 return TYPE;
  83         }
  84 }