pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/object/PCEPObjectiveFunctionObjectParser.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 java.util.NoSuchElementException;
  11
  12 import org.opendaylight.protocol.pcep.PCEPDeserializerException;
  13 import org.opendaylight.protocol.pcep.PCEPObject;
  14 import org.opendaylight.protocol.pcep.impl.PCEPOFCodesMapping;
  15 import org.opendaylight.protocol.pcep.impl.PCEPObjectParser;
  16 import org.opendaylight.protocol.pcep.impl.PCEPTlvParser;
  17 import org.opendaylight.protocol.pcep.object.PCEPObjectiveFunctionObject;
  18 import org.opendaylight.protocol.util.ByteArray;
  19
  20 /**
  21  * Parser for {@link org.opendaylight.protocol.pcep.object.PCEPObjectiveFunctionObject
  22  * PCEPObjectiveFunctionObject}
  23  */
  24 public class PCEPObjectiveFunctionObjectParser implements PCEPObjectParser {
  25
  26         /*
  27          * lengths of fields
  28          */
  29         public static final int OF_CODE_F_LENGTH = 2;
  30
  31         /*
  32          * offsets of fields
  33          */
  34         public static final int OF_CODE_F_OFFSET = 0;
  35         public static final int TLVS_OFFSET = OF_CODE_F_OFFSET + OF_CODE_F_LENGTH + 2; // added reserved field of size 2
  36
  37         @Override
  38         public PCEPObject parse(byte[] bytes, boolean processed, boolean ignored) throws PCEPDeserializerException {
  39                 if (bytes == null || bytes.length == 0)
  40                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  41
  42                 if (bytes.length < TLVS_OFFSET)
  43                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + bytes.length + "; Expected: >=" + TLVS_OFFSET + ".");
  44                 try {
  45                         return new PCEPObjectiveFunctionObject(PCEPOFCodesMapping.getInstance().getFromCodeIdentifier(
  46                                         ByteArray.bytesToShort(ByteArray.subByte(bytes, OF_CODE_F_OFFSET, OF_CODE_F_LENGTH)) & 0xFFFF), PCEPTlvParser.parse(ByteArray.cutBytes(
  47                                         bytes, TLVS_OFFSET)), processed, ignored);
  48                 } catch (final NoSuchElementException e) {
  49                         throw new PCEPDeserializerException(e, "Objective function object has unknown identifier.");
  50                 }
  51         }
  52
  53         @Override
  54         public byte[] put(PCEPObject obj) {
  55                 if (!(obj instanceof PCEPObjectiveFunctionObject))
  56                         throw new IllegalArgumentException("Wrong instance of PCEPObject. Passed " + obj.getClass() + ". Needed PCEPObjectiveFunction.");
  57
  58                 final PCEPObjectiveFunctionObject specObj = (PCEPObjectiveFunctionObject) obj;
  59
  60                 final byte[] tlvs = PCEPTlvParser.put(specObj.getTlvs());
  61                 final byte[] retBytes = new byte[TLVS_OFFSET + tlvs.length];
  62
  63                 ByteArray.copyWhole(tlvs, retBytes, TLVS_OFFSET);
  64
  65                 ByteArray.copyWhole(ByteArray.shortToBytes((short) PCEPOFCodesMapping.getInstance().getFromOFCodesEnum(specObj.getCode())), retBytes, OF_CODE_F_OFFSET);
  66
  67                 return retBytes;
  68         }
  69
  70 }