/*
 * Copyright (c) 2015 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.rib.impl;

import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.bgp.rib.rib.loc.rib.tables.routes.Ipv4RoutesCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.DestinationIpv4;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.prefixes.destination.ipv4.Ipv4Prefixes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.routes.Ipv4Routes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev150305.ipv4.routes.ipv4.routes.Ipv4Route;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev130925.rib.tables.Routes;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.ChoiceNode;
import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;

/**
 * Class supporting IPv4 unicast RIBs.
 */
final class IPv4RIBSupport extends AbstractIPRIBSupport {
    private final static QName PREFIX_QNAME = QName.cachedReference(QName.create(Ipv4Route.QNAME, "prefix"));
    private static final IPv4RIBSupport SINGLETON = new IPv4RIBSupport();
    private final ChoiceNode emptyRoutes = Builders.choiceBuilder()
            .withNodeIdentifier(new NodeIdentifier(Routes.QNAME))
            .addChild(Builders.containerBuilder()
                .withNodeIdentifier(new NodeIdentifier(Ipv4Routes.QNAME))
                .withChild(ImmutableNodes.mapNodeBuilder(Ipv4Route.QNAME).build()).build()).build();
    private final NodeIdentifier destination = new NodeIdentifier(DestinationIpv4.QNAME);
    private final NodeIdentifier route = new NodeIdentifier(Ipv4Route.QNAME);
    private final NodeIdentifier nlriRoutesList = new NodeIdentifier(Ipv4Prefixes.QNAME);
    private final NodeIdentifier routeKeyKeaf = new NodeIdentifier(PREFIX_QNAME);

    private IPv4RIBSupport() {
        super(Ipv4RoutesCase.class, Ipv4Routes.class, Ipv4Route.class);
    }

    static IPv4RIBSupport getInstance() {
        return SINGLETON;
    }

    @Override
    public ChoiceNode emptyRoutes() {
        return this.emptyRoutes;
    }

    @Override
    protected NodeIdentifier destinationContainerIdentifier() {
        return this.destination;
    }

    @Override
    protected NodeIdentifier routeIdentifier() {
        return this.route;
    }

    @Override
    protected NodeIdentifier routeKeyLeafIdentifier() {
        return routeKeyKeaf;
    }

    @Override
    protected NodeIdentifier nlriRoutesListIdentifier() {
        return this.nlriRoutesList;
    }

    @Override
    protected QName keyLeafQName() {
        return PREFIX_QNAME;
    }

    @Override
    protected QName routeQName() {
        return Ipv4Route.QNAME;
    }
}