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.UnsignedBytes;
  21 import com.google.common.primitives.UnsignedInts;
  22
  23 /**
  24  * Parser for {@link UnnumberedSubobject}
  25  */
  26 public class XROUnnumberedInterfaceSubobjectParser implements XROSubobjectParser, XROSubobjectSerializer {
  27
  28         public static final int TYPE = 4;
  29
  30         private static final int ATTRIBUTE_LENGTH = 1;
  31         private static final int ROUTER_ID_NUMBER_LENGTH = 4;
  32         private static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  33
  34         private static final int ATTRIBUTE_OFFSET = 1;
  35         private static final int ROUTER_ID_NUMBER_OFFSET = ATTRIBUTE_OFFSET + ATTRIBUTE_LENGTH;
  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         @Override
  41         public Subobjects parseSubobject(final byte[] buffer, final boolean mandatory) throws PCEPDeserializerException {
  42                 if (buffer == null || buffer.length == 0) {
  43                         throw new IllegalArgumentException("Array of bytes is mandatory. Can't be null or empty.");
  44                 }
  45                 if (buffer.length != CONTENT_LENGTH) {
  46                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.length + "; Expected: "
  47                                         + CONTENT_LENGTH + ".");
  48                 }
  49
  50                 final SubobjectsBuilder builder = new SubobjectsBuilder();
  51                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  52                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  53                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  54                                 INTERFACE_ID_NUMBER_LENGTH))));
  55                 builder.setSubobjectType(ubuilder.build());
  56                 builder.setMandatory(mandatory);
  57                 builder.setAttribute(Attribute.forValue(UnsignedBytes.toInt(buffer[ATTRIBUTE_OFFSET])));
  58                 return builder.build();
  59         }
  60
  61         @Override
  62         public byte[] serializeSubobject(final Subobjects subobject) {
  63                 if (!(subobject.getSubobjectType() instanceof UnnumberedSubobject)) {
  64                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  65                                         + ". Needed UnnumberedSubobject.");
  66                 }
  67
  68                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  69                 final UnnumberedSubobject specObj = (UnnumberedSubobject) subobject.getSubobjectType();
  70
  71                 retBytes[ATTRIBUTE_OFFSET] = UnsignedBytes.checkedCast(subobject.getAttribute().getIntValue());
  72                 ByteArray.copyWhole(ByteArray.subByte(ByteArray.longToBytes(specObj.getRouterId()), 4, ROUTER_ID_NUMBER_LENGTH), retBytes,
  73                                 ROUTER_ID_NUMBER_OFFSET);
  74                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId()), Long.SIZE / Byte.SIZE - INTERFACE_ID_NUMBER_LENGTH, retBytes,
  75                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  76                 return retBytes;
  77         }
  78
  79         @Override
  80         public int getType() {
  81                 return TYPE;
  82         }
  83 }