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.impl.object.XROSubobjectUtil;
  11 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  12 import org.opendaylight.protocol.pcep.spi.XROSubobjectParser;
  13 import org.opendaylight.protocol.pcep.spi.XROSubobjectSerializer;
  14 import org.opendaylight.protocol.util.ByteArray;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.Subobject;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.exclude.route.object.xro.SubobjectBuilder;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.ExcludeRouteSubobjects.Attribute;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.UnnumberedSubobject;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.UnnumberedCase;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.UnnumberedCaseBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.unnumbered._case.UnnumberedBuilder;
  22
  23 import com.google.common.primitives.UnsignedBytes;
  24 import com.google.common.primitives.UnsignedInts;
  25
  26 /**
  27  * Parser for {@link UnnumberedCase}
  28  */
  29 public class XROUnnumberedInterfaceSubobjectParser implements XROSubobjectParser, XROSubobjectSerializer {
  30
  31         public static final int TYPE = 4;
  32
  33         private static final int ATTRIBUTE_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 ATTRIBUTE_OFFSET = 1;
  38         private static final int ROUTER_ID_NUMBER_OFFSET = ATTRIBUTE_OFFSET + ATTRIBUTE_LENGTH;
  39         private static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  40
  41         private static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  42
  43         @Override
  44         public Subobject parseSubobject(final byte[] buffer, final boolean mandatory) 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 SubobjectBuilder builder = new SubobjectBuilder();
  54                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  55                 ubuilder.setRouterId(ByteArray.bytesToLong(ByteArray.subByte(buffer, ROUTER_ID_NUMBER_OFFSET, ROUTER_ID_NUMBER_LENGTH)));
  56                 ubuilder.setInterfaceId(UnsignedInts.toLong(ByteArray.bytesToInt(ByteArray.subByte(buffer, INTERFACE_ID_NUMBER_OFFSET,
  57                                 INTERFACE_ID_NUMBER_LENGTH))));
  58                 builder.setSubobjectType(new UnnumberedCaseBuilder().setUnnumbered(ubuilder.build()).build());
  59                 builder.setMandatory(mandatory);
  60                 builder.setAttribute(Attribute.forValue(UnsignedBytes.toInt(buffer[ATTRIBUTE_OFFSET])));
  61                 return builder.build();
  62         }
  63
  64         @Override
  65         public byte[] serializeSubobject(final Subobject subobject) {
  66                 if (!(subobject.getSubobjectType() instanceof UnnumberedCase)) {
  67                         throw new IllegalArgumentException("Unknown PCEPXROSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  68                                         + ". Needed UnnumberedCase.");
  69                 }
  70
  71                 final byte[] retBytes = new byte[CONTENT_LENGTH];
  72                 final UnnumberedSubobject specObj = ((UnnumberedCase) subobject.getSubobjectType()).getUnnumbered();
  73
  74                 retBytes[ATTRIBUTE_OFFSET] = UnsignedBytes.checkedCast(subobject.getAttribute().getIntValue());
  75                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId(), ROUTER_ID_NUMBER_LENGTH), retBytes, ROUTER_ID_NUMBER_OFFSET);
  76                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId(), INTERFACE_ID_NUMBER_LENGTH), 0, retBytes,
  77                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  78                 return XROSubobjectUtil.formatSubobject(TYPE, subobject.isMandatory(), retBytes);
  79         }
  80
  81         @Override
  82         public int getType() {
  83                 return TYPE;
  84         }
  85 }