[GraphHopper] question on GraphHopperStorage.EdgeIterable.setFlags

[Renaud De Landtsheer]

Hi Peter,

I was reading the source code of GraphHopperStorage.EdgeIterable
https://github.com/graphhopper/graphhopper/blob/master/core/src/main/java/com/graphhopper/storage/GraphHopperStorage.java

I'v seen a fragment of code I do not understand,
and I wonder if it has some hidden consequences on my understanding on 
the storages of GraphHopper.

It is the method "EdgeIterable.setFlags". In this method, the flags of 
the edges are indeed set,
but the edge is also written again on the storage through a call to 
writeEdge.

   @Override
         public final EdgeIteratorState setFlags( long fl )
         {
             int nep = edges.getInt(getLinkPosInEdgeArea(baseNode, node, 
edgePointer));
             int neop = edges.getInt(getLinkPosInEdgeArea(node, 
baseNode, edgePointer));
             writeEdge(getEdge(), baseNode, node, nep, neop);
             GraphHopperStorage.this.setFlags(edgePointer, baseNode, 
node, fl);
             return this;
         }

Can you help me?
thank you very much.

-- 
*Renaud De Landtsheer, Ir, Phd*
Senior R&D Expert
CETIC
Rue des Frères Wright, 29/3
B-6041 Charleroi
Phone: +32 71 490 754


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