graph.plantuml

@startuml


class Vertex {
    -int id
    -Object info
    -String color
}

abstract class Edge {
    -int id
    -String color
    -Vertex [2] ends
    -double value
    +Vertex[] getEnds()
}

class DirectedEdge extends Edge {
    -int source
    +Vertex getSource()
    +Vertex getSink()

}

Interface Graph {
    +int nbOfVertices()
    +int nbOfEdges()
    +void addVertex(Vertex)
    +void addEdge(Edge)
    +Boolean isConnected(Vertex, Vertex)
    +Boolean isConnected()
    +Edge[] getEdge(Vertex, Vertex)
    +Edge[] getEdges()
    +Vertex[] getVertices()
    +Edge[] getNeighborEdges(Vertex)
}


class TestGraph {

}

Vertex o-left-|{ TestGraph
DirectedEdge o-right-|{ TestGraph


@enduml