pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/EROUnnumberedInterfaceSubobjectParser.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 org.opendaylight.protocol.pcep.PCEPDeserializerException;
  11 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  12 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  13 import org.opendaylight.protocol.util.ByteArray;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.Subobjects;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.SubobjectsBuilder;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.UnnumberedSubobject;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.UnnumberedBuilder;
  18
  19 import com.google.common.primitives.UnsignedInts;
  20
  21 /**
  22  * Parser for {@link UnnumberedSubobject}
  23  */
  24 public class EROUnnumberedInterfaceSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  25
  26         public static final int TYPE = 4;
  27
  28         public static final int ROUTER_ID_NUMBER_LENGTH = 4;
  29         public static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  30
  31         public static final int ROUTER_ID_NUMBER_OFFSET = 2; // added reserved field of size 2
  32         public static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  33
  34         public static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  35
  36         @Override
  37         public Subobjects parseSubobject(final byte[] buffer, final boolean loose) throws PCEPDeserializerException {
  38                 if (buffer == null || buffer.length == 0)
  39                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  40                 if (buffer.length != CONTENT_LENGTH)
  41                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: "
  42                                         + CONTENT_LENGTH + ".");
  43                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  44                 builder.setLoose(loose);
  45                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  46                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  47                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  48                                 INTERFACE_ID_NUMBER_LENGTH))));
  49                 builder.setSubobjectType(ubuilder.build());
  50                 return builder.build();
  51         }
  52
  53         @Override
  54         public byte[] serializeSubobject(final Subobjects subobject) {
  55                 if (!(subobject.getSubobjectType() instanceof UnnumberedSubobject))
  56                         throw new IllegalArgumentException("Unknown ExplicitRouteSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  57                                         + ". Needed UnnumberedSubobject.");
  58
  59                 byte[] retBytes;
  60                 retBytes = new byte[CONTENT_LENGTH];
  61                 final UnnumberedSubobject specObj = (UnnumberedSubobject) subobject.getSubobjectType();
  62
  63                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId()), retBytes, ROUTER_ID_NUMBER_OFFSET);
  64                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  65                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  66
  67                 return retBytes;
  68         }
  69
  70         @Override
  71         public int getType() {
  72                 return TYPE;
  73         }
  74 }