Java tutorial
/* * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.protocol.bgp.linkstate.impl.tlvs; import io.netty.buffer.ByteBuf; import org.opendaylight.protocol.bgp.linkstate.spi.LinkstateTlvParser; import org.opendaylight.protocol.util.ByteArray; import org.opendaylight.protocol.util.ByteBufWriteUtil; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.OspfInterfaceIdentifier; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.isis.lan.identifier.IsIsRouterIdentifier; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.isis.lan.identifier.IsIsRouterIdentifierBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.CRouterIdentifier; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.IsisNodeCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.IsisNodeCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.IsisPseudonodeCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.IsisPseudonodeCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.OspfNodeCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.OspfNodeCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.OspfPseudonodeCase; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.OspfPseudonodeCaseBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.isis.node._case.IsisNode; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.isis.node._case.IsisNodeBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.isis.pseudonode._case.IsisPseudonode; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.isis.pseudonode._case.IsisPseudonodeBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.ospf.node._case.OspfNodeBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.ospf.pseudonode._case.OspfPseudonode; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.linkstate.rev150210.node.identifier.c.router.identifier.ospf.pseudonode._case.OspfPseudonodeBuilder; import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.network.concepts.rev131125.IsoSystemIdentifier; import org.opendaylight.yangtools.yang.common.QName; public final class RouterIdTlvParser implements LinkstateTlvParser<CRouterIdentifier>, LinkstateTlvParser.LinkstateTlvSerializer<CRouterIdentifier> { private static final int OSPF_PSEUDONODE_ROUTER_ID_LENGTH = 8; private static final int OSPF_ROUTER_ID_LENGTH = 4; private static final int ISO_SYSTEM_ID_LENGTH = 6; private static final int PSN_LENGTH = 1; private static final int IGP_ROUTER_ID = 515; @Override public void serializeTlvBody(final CRouterIdentifier tlv, final ByteBuf body) { if (tlv instanceof IsisNodeCase) { final IsisNode isis = ((IsisNodeCase) tlv).getIsisNode(); body.writeBytes(isis.getIsoSystemId().getValue()); } else if (tlv instanceof IsisPseudonodeCase) { final IsisPseudonode isis = ((IsisPseudonodeCase) tlv).getIsisPseudonode(); body.writeBytes(isis.getIsIsRouterIdentifier().getIsoSystemId().getValue()); ByteBufWriteUtil.writeUnsignedByte(isis.getPsn(), body); } else if (tlv instanceof OspfNodeCase) { ByteBufWriteUtil.writeUnsignedInt(((OspfNodeCase) tlv).getOspfNode().getOspfRouterId(), body); } else if (tlv instanceof OspfPseudonodeCase) { final OspfPseudonode node = ((OspfPseudonodeCase) tlv).getOspfPseudonode(); ByteBufWriteUtil.writeUnsignedInt(node.getOspfRouterId(), body); ByteBufWriteUtil.writeUnsignedInt(node.getLanInterface().getValue(), body); } } @Override public CRouterIdentifier parseTlvBody(final ByteBuf value) { if (value.readableBytes() == ISO_SYSTEM_ID_LENGTH || (value.readableBytes() == ISO_SYSTEM_ID_LENGTH + PSN_LENGTH && value.getByte(ISO_SYSTEM_ID_LENGTH) == 0)) { return new IsisNodeCaseBuilder().setIsisNode(new IsisNodeBuilder() .setIsoSystemId(new IsoSystemIdentifier(ByteArray.readBytes(value, ISO_SYSTEM_ID_LENGTH))) .build()).build(); } if (value.readableBytes() == ISO_SYSTEM_ID_LENGTH + PSN_LENGTH) { final IsIsRouterIdentifier iri = new IsIsRouterIdentifierBuilder() .setIsoSystemId(new IsoSystemIdentifier(ByteArray.readBytes(value, ISO_SYSTEM_ID_LENGTH))) .build(); return new IsisPseudonodeCaseBuilder().setIsisPseudonode(new IsisPseudonodeBuilder() .setIsIsRouterIdentifier(iri).setPsn((short) value.readByte()).build()).build(); } if (value.readableBytes() == OSPF_ROUTER_ID_LENGTH) { return new OspfNodeCaseBuilder() .setOspfNode(new OspfNodeBuilder().setOspfRouterId(value.readUnsignedInt()).build()).build(); } if (value.readableBytes() == OSPF_PSEUDONODE_ROUTER_ID_LENGTH) { return new OspfPseudonodeCaseBuilder() .setOspfPseudonode(new OspfPseudonodeBuilder().setOspfRouterId(value.readUnsignedInt()) .setLanInterface(new OspfInterfaceIdentifier(value.readUnsignedInt())).build()) .build(); } return null; } @Override public int getType() { return IGP_ROUTER_ID; } @Override public QName getTlvQName() { return CRouterIdentifier.QNAME; } }