db_graph_edge.h

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/*
 * Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
 * Copyright Contributors to the OpenSDN project
 */
 
#ifndef __DB_DB_GRAPH_EDGE_H__
#define __DB_DB_GRAPH_EDGE_H__
 
#include "base/util.h"
 
#include "db/db_entry.h"
#include "db/db_graph_base.h"
 
class DBGraph;
class DBGraphVertex;
 
class DBGraphEdge : public DBEntry {
public:
    typedef DBGraphBase::vertex_descriptor Vertex;
    typedef DBGraphBase::edge_descriptor Edge;
 
    DBGraphEdge();
 
    void SetEdge(Edge edge);
 
    Edge edge_id() const {
        assert(!IsDeleted());
        // Don't access the edge id after deleting from graph
        return edge_id_;
    }
 
    DBGraphVertex *source(DBGraph *graph);
    const DBGraphVertex *source(DBGraph *graph) const;
 
    DBGraphVertex *target(DBGraph *graph);
    const DBGraphVertex *target(DBGraph *graph) const;
 
    virtual const std::string &name() const = 0;
private:
    Edge edge_id_;
 
    DISALLOW_COPY_AND_ASSIGN(DBGraphEdge);
};
 
#endif