// Copyright: 	Matra-Datavision 1991
// File:	PCollection_BackEdgesIterator.gxx
// Created:	Wed May 29 17:42:21 1991
// Author:	Denis PASCAL
//		<dp>
// Revised by:  Mireille MERCIEN
//              Sep,7 1992

#include <Standard_NoMoreObject.hxx>
#include <Standard_NoSuchObject.hxx>

//---------------------------------------------------------------------------
// Constructor
//---------------------------------------------------------------------------
PCollection_BackEdgesIterator::PCollection_BackEdgesIterator
     (const Handle(PCollection_Vertex)& V):MyEdgeIterator(V->GetBackEdges()) 
{
  HasMore = MyEdgeIterator.More();
}

//---------------------------------------------------------------------------
// More
//---------------------------------------------------------------------------
Boolean PCollection_BackEdgesIterator::More () const 
{
  return HasMore;
}

//---------------------------------------------------------------------------
// Next
//---------------------------------------------------------------------------
void PCollection_BackEdgesIterator::Next () 
{
  if (!HasMore) Standard_NoMoreObject::Raise();
  MyEdgeIterator.Next();
  HasMore = MyEdgeIterator.More();
}

//---------------------------------------------------------------------------
// Value
//---------------------------------------------------------------------------
Handle(PCollection_Edge) PCollection_BackEdgesIterator::Value () const 
{
  if (HasMore) {
    return MyEdgeIterator.Value();
  }
  else {
    NoSuchObject::Raise();
  }
}

//---------------------------------------------------------------------------
// Clear
//---------------------------------------------------------------------------
void PCollection_BackEdgesIterator::Clear () 
{
  HasMore = False;
}