pcep/ietf-stateful07/src/main/java/org/opendaylight/protocol/pcep/ietf/initiated00/CInitiated00StatefulCapabilityTlvParser.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.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.rev131126.Stateful1;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.crabbe.initiated.rev131126.Stateful1Builder;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.stateful.capability.tlv.Stateful;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev131222.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 CInitiated00StatefulCapabilityTlvParser 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 U_FLAG_OFFSET = 31;
  33
  34         @Override
  35         public Stateful parseTlv(final byte[] buffer) throws PCEPDeserializerException {
  36                 if (buffer == null || buffer.length == 0) {
  37                         throw new IllegalArgumentException("Value bytes array is mandatory. Can't be null or empty.");
  38                 }
  39                 if (buffer.length < FLAGS_F_LENGTH) {
  40                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: >= "
  41                                         + FLAGS_F_LENGTH + ".");
  42                 }
  43                 final BitSet flags = ByteArray.bytesToBitSet(ByteArray.subByte(buffer, 0, FLAGS_F_LENGTH));
  44
  45                 final StatefulBuilder sb = new StatefulBuilder();
  46                 sb.setLspUpdateCapability(flags.get(U_FLAG_OFFSET));
  47
  48                 if (flags.get(I_FLAG_OFFSET)) {
  49                         sb.addAugmentation(Stateful1.class, new Stateful1Builder().setInitiation(Boolean.TRUE).build());
  50                 }
  51                 return sb.build();
  52         }
  53
  54         @Override
  55         public byte[] serializeTlv(final Tlv tlv) {
  56                 if (tlv == null) {
  57                         throw new IllegalArgumentException("StatefulCapabilityTlv is mandatory.");
  58                 }
  59                 final Stateful sct = (Stateful) tlv;
  60
  61                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  62
  63                 final Stateful1 sfi = sct.getAugmentation(Stateful1.class);
  64                 if (sfi != null) {
  65                         flags.set(I_FLAG_OFFSET, sfi.isInitiation());
  66                 }
  67                 flags.set(U_FLAG_OFFSET, sct.isLspUpdateCapability());
  68                 return ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH);
  69         }
  70
  71         @Override
  72         public int getType() {
  73                 return TYPE;
  74         }
  75 }