pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPClassTypeObjectParser.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.PCEPErrors;
  13 import org.opendaylight.protocol.pcep.PCEPObject;
  14 import org.opendaylight.protocol.pcep.impl.PCEPObjectParser;
  15 import org.opendaylight.protocol.pcep.object.PCEPClassTypeObject;
  16 import org.opendaylight.protocol.util.ByteArray;
  17
  18 /**
  19  * Parser for {@link org.opendaylight.protocol.pcep.object.PCEPClassTypeObject PCEPClassTypeObject}
  20  */
  21 public class PCEPClassTypeObjectParser implements PCEPObjectParser {
  22
  23         /**
  24          * Length of Class Type field in bits.
  25          */
  26         public static final int CT_F_LENGTH = 3;
  27
  28         /**
  29          * Reserved field bit length.
  30          */
  31         public static final int RESERVED = 29;
  32
  33         /**
  34          * Size of the object in bytes.
  35          */
  36         public static final int SIZE = (RESERVED + CT_F_LENGTH) / 8;
  37
  38         @Override
  39         public PCEPObject parse(byte[] bytes, boolean processed, boolean ignored)
  40                         throws PCEPDeserializerException, PCEPDocumentedException {
  41                 if (bytes == null)
  42                         throw new IllegalArgumentException("Byte array is mandatory.");
  43                 if (bytes.length != SIZE)
  44                         throw new PCEPDeserializerException("Size of byte array doesn't match defined size. Expected: " + SIZE + "; Passed: " + bytes.length);
  45                 if (!processed)
  46                         throw new PCEPDocumentedException("Processed bit not set", PCEPErrors.P_FLAG_NOT_SET);
  47                 final short classType = (short) (bytes[SIZE-1] & 0xFF);
  48                 if (classType < 0 || classType > 8) {
  49                         throw new PCEPDocumentedException("Invalid class type " + classType, PCEPErrors.INVALID_CT);
  50                 }
  51                 return new PCEPClassTypeObject(classType);
  52         }
  53
  54         @Override
  55         public byte[] put(PCEPObject obj) {
  56                 if (!(obj instanceof PCEPClassTypeObject))
  57                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + obj.getClass() + ". Needed PCEPClassTypeObject.");
  58
  59                 final byte[] retBytes = new byte[SIZE];
  60                 retBytes[SIZE-1] = ByteArray.shortToBytes(((PCEPClassTypeObject) obj).getClassType())[1];
  61                 return retBytes;
  62         }
  63 }