[Dune] How to store entities?

[Bernd Flemisch]

Dear Dune,

for some of our models, we store for each vertex all elements that share 
this vertex. We currently use a
std::vector<EntityPointer>
for this. I have a couple of questions concerning this:

1. Is this currently a good choice or are there better choices?

2. When would it be safe to store (smart) pointers to 
Entities/EntityPointers/EntitySeeds?

3. What should I use in the future when EntityPointer is gone?

4. How strong do the answers to the questions above depend on the grid 
manager that is used?

5. Will EntitySeed get a method that restores the Entity rather than the 
current method that restores the EntityPointer? When?

I guess that I could draw some conclusions from the "lifetime of 
objects" discussion, but this is very hard to follow for me.

Thank you. Kind regards
Bernd

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Bernd Flemisch                         phone: +49 711 685 69162
IWS, Universität Stuttgart             fax:   +49 711 685 60430
Pfaffenwaldring 61            email: bernd at iws.uni-stuttgart.de
D-70569 Stuttgart            url: www.hydrosys.uni-stuttgart.de
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