pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/RROUnnumberedInterfaceSubobjectParser.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.subobject;
   9
  10 import java.util.Arrays;
  11 import java.util.BitSet;
  12
  13 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  14 import org.opendaylight.protocol.pcep.spi.RROSubobjectParser;
  15 import org.opendaylight.protocol.pcep.spi.RROSubobjectSerializer;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.Subobjects;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.reported.route.object.rro.SubobjectsBuilder;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.UnnumberedSubobject;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.UnnumberedBuilder;
  21
  22 import com.google.common.primitives.UnsignedInts;
  23
  24 /**
  25  * Parser for {@link UnnumberedSubobject}
  26  */
  27 public class RROUnnumberedInterfaceSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
  28
  29         public static final int TYPE = 4;
  30
  31         private static final int FLAGS_F_LENGTH = 1;
  32         private static final int ROUTER_ID_NUMBER_LENGTH = 4;
  33         private static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  34
  35         private static final int ROUTER_ID_NUMBER_OFFSET = 2;
  36         private static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  37
  38         private static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  39
  40         private static final int LPA_F_OFFSET = 7;
  41         private static final int LPIU_F_OFFSET = 6;
  42
  43         @Override
  44         public Subobjects parseSubobject(final byte[] buffer) throws PCEPDeserializerException {
  45                 if (buffer == null || buffer.length == 0) {
  46                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  47                 }
  48                 if (buffer.length != CONTENT_LENGTH) {
  49                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: "
  50                                         + CONTENT_LENGTH + ".");
  51                 }
  52
  53                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  54                 final BitSet flags = ByteArray.bytesToBitSet(Arrays.copyOfRange(buffer, 0, FLAGS_F_LENGTH));
  55                 builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
  56                 builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
  57                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  58                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  59                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  60                                 INTERFACE_ID_NUMBER_LENGTH))));
  61                 builder.setSubobjectType(ubuilder.build());
  62                 return builder.build();
  63         }
  64
  65         @Override
  66         public byte[] serializeSubobject(final Subobjects subobject) {
  67                 if (!(subobject.getSubobjectType() instanceof UnnumberedSubobject)) {
  68                         throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  69                                         + ". Needed UnnumberedSubobject.");
  70                 }
  71                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  72                 final UnnumberedSubobject specObj = (UnnumberedSubobject) subobject.getSubobjectType();
  73                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  74                 flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
  75                 flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
  76                 retBytes[0] = ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH)[0];
  77                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId(), ROUTER_ID_NUMBER_LENGTH), retBytes, ROUTER_ID_NUMBER_OFFSET);
  78                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId(), INTERFACE_ID_NUMBER_LENGTH), 0, retBytes,
  79                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  80                 return retBytes;
  81         }
  82
  83         @Override
  84         public int getType() {
  85                 return TYPE;
  86         }
  87 }