/// <summary> A lazy build of edge container for specified vertex.
///
/// </summary>
/// <param name="vertex">a vertex in this graph.
///
/// </param>
/// <returns> EdgeContainer
/// </returns>
private UndirectedEdgeContainer getEdgeContainer(System.Object vertex)
{
Enclosing_Instance.assertVertexExist(vertex);
UndirectedEdgeContainer ec = (UndirectedEdgeContainer)Enclosing_Instance.m_vertexMap[vertex];
if (ec == null)
{
ec = new UndirectedEdgeContainer(Enclosing_Instance.m_edgeListFactory, vertex);
Enclosing_Instance.m_vertexMap[vertex] = ec;
}
return(ec);
}
/// <summary> A lazy build of edge container for specified vertex.
///
/// </summary>
/// <param name="vertex">a vertex in this graph.
///
/// </param>
/// <returns> EdgeContainer
/// </returns>
private UndirectedEdgeContainer getEdgeContainer(System.Object vertex)
{
Enclosing_Instance.assertVertexExist(vertex);
UndirectedEdgeContainer ec = (UndirectedEdgeContainer) Enclosing_Instance.m_vertexMap[vertex];
if (ec == null)
{
ec = new UndirectedEdgeContainer(Enclosing_Instance.m_edgeListFactory, vertex);
Enclosing_Instance.m_vertexMap[vertex] = ec;
}
return ec;
}
