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.UnnumberedCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.UnnumberedCaseBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.record.route.subobjects.subobject.type.unnumbered._case.UnnumberedBuilder;
  23
  24 import com.google.common.primitives.UnsignedInts;
  25
  26 /**
  27  * Parser for {@link UnnumberedCase}
  28  */
  29 public class RROUnnumberedInterfaceSubobjectParser implements RROSubobjectParser, RROSubobjectSerializer {
  30
  31         public static final int TYPE = 4;
  32
  33         private static final int FLAGS_F_LENGTH = 1;
  34         private static final int ROUTER_ID_NUMBER_LENGTH = 4;
  35         private static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  36
  37         private static final int ROUTER_ID_NUMBER_OFFSET = 2;
  38         private static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  39
  40         private static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  41
  42         private static final int LPA_F_OFFSET = 7;
  43         private static final int LPIU_F_OFFSET = 6;
  44
  45         @Override
  46         public Subobjects parseSubobject(final byte[] buffer) throws PCEPDeserializerException {
  47                 if (buffer == null || buffer.length == 0) {
  48                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  49                 }
  50                 if (buffer.length != CONTENT_LENGTH) {
  51                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: "
  52                                         + CONTENT_LENGTH + ".");
  53                 }
  54
  55                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  56                 final BitSet flags = ByteArray.bytesToBitSet(Arrays.copyOfRange(buffer, 0, FLAGS_F_LENGTH));
  57                 builder.setProtectionAvailable(flags.get(LPA_F_OFFSET));
  58                 builder.setProtectionInUse(flags.get(LPIU_F_OFFSET));
  59                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  60                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  61                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  62                                 INTERFACE_ID_NUMBER_LENGTH))));
  63                 builder.setSubobjectType(new UnnumberedCaseBuilder().setUnnumbered(ubuilder.build()).build());
  64                 return builder.build();
  65         }
  66
  67         @Override
  68         public byte[] serializeSubobject(final Subobjects subobject) {
  69                 if (!(subobject.getSubobjectType() instanceof UnnumberedCase)) {
  70                         throw new IllegalArgumentException("Unknown ReportedRouteSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  71                                         + ". Needed UnnumberedCase.");
  72                 }
  73                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  74                 final UnnumberedSubobject specObj = ((UnnumberedCase) subobject.getSubobjectType()).getUnnumbered();
  75                 final BitSet flags = new BitSet(FLAGS_F_LENGTH * Byte.SIZE);
  76                 flags.set(LPA_F_OFFSET, subobject.isProtectionAvailable());
  77                 flags.set(LPIU_F_OFFSET, subobject.isProtectionInUse());
  78                 retBytes[0] = ByteArray.bitSetToBytes(flags, FLAGS_F_LENGTH)[0];
  79                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId(), ROUTER_ID_NUMBER_LENGTH), retBytes, ROUTER_ID_NUMBER_OFFSET);
  80                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId(), INTERFACE_ID_NUMBER_LENGTH), 0, retBytes,
  81                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  82                 return retBytes;
  83         }
  84
  85         @Override
  86         public int getType() {
  87                 return TYPE;
  88         }
  89 }