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/*-
 * Copyright (C) 2011, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This file was distributed by Oracle as part of a version of Oracle NoSQL
 * Database made available at:
 *
 * http://www.oracle.com/technetwork/database/database-technologies/nosqldb/downloads/index.html
 *
 * Please see the LICENSE file included in the top-level directory of the
 * appropriate version of Oracle NoSQL Database for a copy of the license and
 * additional information.
 */
package oracle.kv.impl.topo;

import com.sleepycat.persist.model.Entity;
import com.sleepycat.persist.model.PrimaryKey;
import oracle.kv.impl.metadata.Metadata.MetadataType;

/**
 * The Entity that leads to a Topology object. We need this indirection so that
 * Topology can be referenced from other objects like Plans.
 */
@Entity
public class TopologyHolder {

    @PrimaryKey
    private final String topologyKey = getKey();

    private Topology topology;

    @SuppressWarnings("unused")
    private TopologyHolder() {
    }

    public TopologyHolder(Topology topology) {
        this.topology = topology;
    }

    public static String getKey() {
        return MetadataType.TOPOLOGY.getKey();
    }

    public Topology getTopology() {
        return topology;
    }
}