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// Copyright: Matra-Datavision 1991
// File: PCollection_RootsIterator.gxx
// Created: Wed May 29 17:43:32 1991
// Author: Denis PASCAL
// <dp>
// Revised by: Mireille MERCIEN
// Sep,7 1992
#include <Standard_NoMoreObject.hxx>
#include <Standard_NoSuchObject.hxx>
//---------------------------------------------------------------------------
// Constructor
//---------------------------------------------------------------------------
PCollection_RootsIterator::PCollection_RootsIterator
(const Handle(PCollection_HDirectedGraph)& G):MyVertexIterator(G->GetVertices())
{
HasMore = False;
while ((MyVertexIterator.More()) && (!HasMore)) {
if (MyVertexIterator.Value()->IsRoot())
HasMore = True;
else
MyVertexIterator.Next();
}
}
//---------------------------------------------------------------------------
// More
//---------------------------------------------------------------------------
Boolean PCollection_RootsIterator::More () const
{
return HasMore;
}
//---------------------------------------------------------------------------
// Next
//---------------------------------------------------------------------------
void PCollection_RootsIterator::Next ()
{
if (!HasMore) Standard_NoMoreObject::Raise();
HasMore = False;
MyVertexIterator.Next();
while ((MyVertexIterator.More()) && (!HasMore)) {
if (MyVertexIterator.Value()->IsRoot())
HasMore = True;
else
MyVertexIterator.Next();
}
}
//---------------------------------------------------------------------------
// Value
//---------------------------------------------------------------------------
Handle(PCollection_Vertex) PCollection_RootsIterator::Value () const
{
if (!HasMore) Standard_NoSuchObject::Raise();
return MyVertexIterator.Value();
}
//---------------------------------------------------------------------------
// Clear
//---------------------------------------------------------------------------
void PCollection_RootsIterator::Clear ()
{
// Nullify sur les champs
HasMore = False;
}
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