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 io.netty.buffer.ByteBuf;
  11
  12 import org.opendaylight.protocol.pcep.impl.object.EROSubobjectUtil;
  13 import org.opendaylight.protocol.pcep.spi.EROSubobjectParser;
  14 import org.opendaylight.protocol.pcep.spi.EROSubobjectSerializer;
  15 import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.Subobject;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev131005.explicit.route.object.ero.SubobjectBuilder;
  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.basic.explicit.route.subobjects.subobject.type.UnnumberedCase;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.UnnumberedCaseBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.rsvp.rev130820.basic.explicit.route.subobjects.subobject.type.unnumbered._case.UnnumberedBuilder;
  23
  24 import com.google.common.base.Preconditions;
  25
  26 /**
  27  * Parser for {@link UnnumberedCase}
  28  */
  29 public class EROUnnumberedInterfaceSubobjectParser implements EROSubobjectParser, EROSubobjectSerializer {
  30
  31         public static final int TYPE = 4;
  32
  33         private static final int ROUTER_ID_NUMBER_LENGTH = 4;
  34         private static final int INTERFACE_ID_NUMBER_LENGTH = 4;
  35
  36         private static final int ROUTER_ID_NUMBER_OFFSET = 2;
  37         private static final int INTERFACE_ID_NUMBER_OFFSET = ROUTER_ID_NUMBER_OFFSET + ROUTER_ID_NUMBER_LENGTH;
  38
  39         private static final int CONTENT_LENGTH = INTERFACE_ID_NUMBER_OFFSET + INTERFACE_ID_NUMBER_LENGTH;
  40
  41         @Override
  42         public Subobject parseSubobject(final ByteBuf buffer, final boolean loose) throws PCEPDeserializerException {
  43                 Preconditions.checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
  44                 if (buffer.readableBytes() != CONTENT_LENGTH) {
  45                         throw new PCEPDeserializerException("Wrong length of array of bytes. Passed: " + buffer.readableBytes() + "; Expected: "
  46                                         + CONTENT_LENGTH + ".");
  47                 }
  48                 final SubobjectBuilder builder = new SubobjectBuilder();
  49                 builder.setLoose(loose);
  50                 final UnnumberedBuilder ubuilder = new UnnumberedBuilder();
  51                 buffer.readerIndex(buffer.readerIndex() + ROUTER_ID_NUMBER_OFFSET);
  52                 ubuilder.setRouterId(buffer.readUnsignedInt());
  53                 ubuilder.setInterfaceId(buffer.readUnsignedInt());
  54                 builder.setSubobjectType(new UnnumberedCaseBuilder().setUnnumbered(ubuilder.build()).build());
  55                 return builder.build();
  56         }
  57
  58         @Override
  59         public byte[] serializeSubobject(final Subobject subobject) {
  60                 if (!(subobject.getSubobjectType() instanceof UnnumberedCase)) {
  61                         throw new IllegalArgumentException("Unknown ExplicitRouteSubobject instance. Passed " + subobject.getSubobjectType().getClass()
  62                                         + ". Needed UnnumberedCase.");
  63                 }
  64                 byte[] retBytes;
  65                 retBytes = new byte[CONTENT_LENGTH];
  66                 final UnnumberedSubobject specObj = ((UnnumberedCase) subobject.getSubobjectType()).getUnnumbered();
  67                 ByteArray.copyWhole(ByteArray.longToBytes(specObj.getRouterId(), ROUTER_ID_NUMBER_LENGTH), retBytes, ROUTER_ID_NUMBER_OFFSET);
  68                 System.arraycopy(ByteArray.longToBytes(specObj.getInterfaceId(), INTERFACE_ID_NUMBER_LENGTH), 0, retBytes,
  69                                 INTERFACE_ID_NUMBER_OFFSET, INTERFACE_ID_NUMBER_LENGTH);
  70                 return EROSubobjectUtil.formatSubobject(TYPE, subobject.isLoose(), retBytes);
  71         }
  72 }