pcep/impl/src/main/java/org/opendaylight/protocol/pcep/impl/subobject/XROUnnumberedInterfaceSubobjectParser.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.XROSubobjectParser;
  12 import org.opendaylight.protocol.pcep.spi.XROSubobjectSerializer;
  13 import org.opendaylight.protocol.util.ByteArray;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.Subobjects;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.SubobjectsBuilder;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.ExcludeRouteSubobjects.Attribute;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.UnnumberedSubobject;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.UnnumberedBuilder;
  19
  20 import com.google.common.primitives.UnsignedInts;
  21
  22 /**
  23  * Parser for {@link UnnumberedSubobject}
  24  */
  25 public class XROUnnumberedInterfaceSubobjectParser implements XROSubobjectParser, XROSubobjectSerializer {
  26
  27         public static final int TYPE = 4;
  28
  29         public static final int ATTRIBUTE_LENGTH = 1;
  30         public static final int ROUTER_ID_NUMBER_LENGTH = 4;
  31         public static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  32
  33         public static final int ATTRIBUTE_OFFSET = 1;// added reserved field of size 1
  34         public static final int ROUTER_ID_NUMBER_OFFSET = ATTRIBUTE_OFFSET + ATTRIBUTE_LENGTH;
  35         public static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  36
  37         public static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  38
  39         @Override
  40         public Subobjects parseSubobject(final byte[] buffer, final boolean mandatory) throws PCEPDeserializerException {
  41                 if (buffer == null || buffer.length == 0)
  42                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  43                 if (buffer.length != CONTENT_LENGTH)
  44                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: "
  45                                         + CONTENT_LENGTH + ".");
  46
  47                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  48                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  49                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  50                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  51                                 INTERFACE_ID_NUMBER_LENGTH))));
  52                 builder.setSubobjectType(ubuilder.build());
  53                 builder.setMandatory(mandatory);
  54                 builder.setAttribute(Attribute.forValue(buffer[ATTRIBUTE_OFFSET] & 0xFF));
  55                 return builder.build();
  56         }
  57
  58         @Override
  59         public byte[] serializeSubobject(final Subobjects subobject) {
  60                 if (!(subobject.getSubobjectType() instanceof UnnumberedSubobject))
  61                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  62                                         + ". Needed UnnumberedSubobject.");
  63
  64                 byte[] retBytes;
  65                 retBytes = new byte[CONTENT_LENGTH];
  66                 final UnnumberedSubobject specObj = (UnnumberedSubobject) subobject.getSubobjectType();
  67
  68                 retBytes[ATTRIBUTE_OFFSET] = (byte) subobject.getAttribute().getIntValue();
  69                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId()), retBytes, ROUTER_ID_NUMBER_OFFSET);
  70                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  71                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  72                 return retBytes;
  73         }
  74
  75         @Override
  76         public int getType() {
  77                 return TYPE;
  78         }
  79 }