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// Copyright: Matra-Datavision 1991
// File: PCollection_HDirectedGraph.gxx
// Created: Wed May 29 17:06:01 1991
// Author: Denis PASCAL
// <dp>
// Revised: Mireille MERCIEN
#include <Standard_NoSuchObject.hxx>
#include <Standard_NoMoreObject.hxx>
//----------------------------------------------------------------------
PCollection_HDirectedGraph::PCollection_HDirectedGraph ()
{
MyVertices = new PCollection_SetOfVertex;
MyEdges = new PCollection_SetOfEdge;
}
//--------------------------------------------------------------------
Integer PCollection_HDirectedGraph::NumberOfVertices () const
{
return MyVertices->Extent();
}
//--------------------------------------------------------------------
Integer PCollection_HDirectedGraph::NumberOfEdges () const
{
return MyEdges->Extent();
}
//--------------------------------------------------------------------
Integer PCollection_HDirectedGraph::NumberOfLeaves () const
{
Integer nb = 0;
PCollection_SetIteratorOfSetOfVertex It (MyVertices);
while (It.More()) {
Handle(PCollection_Vertex) V = It.Value();
if (V->IsLeaf()) nb++;
It.Next();
}
return nb;
}
//--------------------------------------------------------------------
Integer PCollection_HDirectedGraph::NumberOfRoots () const
{
Integer nb = 0;
PCollection_SetIteratorOfSetOfVertex It(MyVertices);
while (It.More()) {
Handle(PCollection_Vertex) V = It.Value();
if (V->IsRoot()) nb++;
It.Next();
}
return nb;
}
//--------------------------------------------------------------------
Boolean PCollection_HDirectedGraph::IsEmpty () const
{
return (MyVertices->Extent() == 0);
}
//--------------------------------------------------------------------
void PCollection_HDirectedGraph::Clear ()
{
MyVertices = new PCollection_SetOfVertex;
MyEdges = new PCollection_SetOfEdge;
}
//--------------------------------------------------------------------
Boolean PCollection_HDirectedGraph::IsMember
(const Handle(PCollection_Vertex)& V) const
{
return MyVertices->Contains(V);
}
//--------------------------------------------------------------------
Boolean PCollection_HDirectedGraph::IsMember
(const Handle(PCollection_Edge)& E) const
{
return MyEdges->Contains(E);
}
//--------------------------------------------------------------------
Handle(PCollection_Vertex) PCollection_HDirectedGraph::Add
(const Item& val)
{
Handle(PCollection_Vertex) V = new PCollection_Vertex (val,this);
MyVertices->Add(V);
return V;
}
//--------------------------------------------------------------------
void PCollection_HDirectedGraph::Remove (const Handle(PCollection_Vertex)& V)
{
if (IsMember(V)) {
PCollection_BackEdgesIterator ItBack(V);
while (ItBack.More()) {
Handle(PCollection_Edge) BE = ItBack.Value();
if (BE->Source() != V) BE->Source()->RemoveFrontEdge(BE);
MyEdges->Remove(BE);
ItBack.Next();
}
PCollection_FrontEdgesIterator ItFront(V);
while (ItFront.More()) {
Handle(PCollection_Edge) FE = ItFront.Value();
if (FE->Destination() != V) FE->Destination()->RemoveBackEdge(FE);
if (MyEdges->Contains(FE)) MyEdges->Remove(FE);
ItFront.Next();
}
MyVertices->Remove(V);
// V->Nullify(); // test Handle nul sur Vertex retire
}
else {
NoSuchObject::Raise();
}
}
//--------------------------------------------------------------------
Handle(PCollection_Edge) PCollection_HDirectedGraph::Add
(const Handle(PCollection_Vertex)& source,
const Handle(PCollection_Vertex)& destination,
const Attribute& A)
{
if (IsMember(source) && IsMember(destination)) {
Handle(PCollection_Edge) E = new PCollection_Edge (source,destination,A);
source->AddFrontEdge (E);
destination->AddBackEdge(E);
MyEdges->Add (E);
return E;
}
else {
NoSuchObject::Raise();
}
}
//--------------------------------------------------------------------
void PCollection_HDirectedGraph::Remove (const Handle(PCollection_Edge)& E)
{
if (IsMember(E)) {
(E->Source())->RemoveFrontEdge(E);
(E->Destination())->RemoveBackEdge(E);
MyEdges->Remove(E);
// E->Nullify(); // test Handle nul sur Edge retire
}
else {
NoSuchObject::Raise();
}
}
//--------------------------------------------------------------------
Handle(PCollection_SetOfVertex) PCollection_HDirectedGraph::GetVertices() const
{
return MyVertices;
}
//--------------------------------------------------------------------
Handle(PCollection_SetOfEdge) PCollection_HDirectedGraph::GetEdges() const
{
return MyEdges;
}
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