pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/tlv/NoPathVectorTlvParser.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.tlv;
   9
  10 import java.util.BitSet;
  11
  12 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.tlv.NoPathVectorTlv;
  14 import org.opendaylight.protocol.util.ByteArray;
  15
  16 /**
  17  * Parser for {@link org.opendaylight.protocol.pcep.tlv.NoPathVectorTlv NoPathVectorTlv}
  18  */
  19 public class NoPathVectorTlvParser {
  20
  21         public static final int FLAGS_F_LENGTH = 4;
  22
  23         /*
  24          * flags offsets inside flags field in bits
  25          */
  26         public static final int PCE_UNAVAILABLE = 31;
  27         public static final int UNKNOWN_DEST = 30;
  28         public static final int UNKNOWN_SRC = 29;
  29
  30         /*
  31          * flags offsets of flags added by GCO extension
  32          */
  33         public static final int NO_GCO_SOLUTION = 25;
  34         public static final int NO_GCO_MIGRATION_PATH = 26;
  35
  36         /*
  37          * flags offsets of flags added by RFC 6006
  38          */
  39         public static final int REACHABLITY_PROBLEM = 24;
  40
  41         public static NoPathVectorTlv parse(byte[] valueBytes) throws PCEPDeserializerException {
  42                 if (valueBytes == null || valueBytes.length == 0)
  43                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  44
  45                 if (valueBytes.length != FLAGS_F_LENGTH)
  46                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + valueBytes.length + "; Expected: >=" + FLAGS_F_LENGTH + ".");
  47
  48                 final BitSet flags = ByteArray.bytesToBitSet(valueBytes);
  49                 return new NoPathVectorTlv(flags.get(PCE_UNAVAILABLE), flags.get(UNKNOWN_DEST), flags.get(UNKNOWN_SRC), flags.get(NO_GCO_SOLUTION),
  50                                 flags.get(NO_GCO_MIGRATION_PATH), flags.get(REACHABLITY_PROBLEM));
  51         }
  52
  53         public static byte[] put(NoPathVectorTlv obj) {
  54                 if (obj == null)
  55                         throw new IllegalArgumentException("NoPathVectorTlv is mandatory.");
  56
  57                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  58
  59                 flags.set(PCE_UNAVAILABLE, obj.isPceUnavailable());
  60                 flags.set(UNKNOWN_DEST, obj.isUnknownDest());
  61                 flags.set(UNKNOWN_SRC, obj.isUnknownSrc());
  62                 flags.set(NO_GCO_SOLUTION, obj.isNoGCOSolution());
  63                 flags.set(NO_GCO_MIGRATION_PATH, obj.isNoGCOMigrationPath());
  64                 flags.set(REACHABLITY_PROBLEM, obj.isReachablityProblem());
  65
  66                 return ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH);
  67         }
  68 }