On Wed, 2017-12-27 at 12:46 -0500, ajs6f wrote:
> The advice given seems very clear:
>
> > when adding such elements to a graph, you should create them once
> > and store the reference if you will need to refer to those elements
> > more than once during creation
>
> Use Resource myResource = model.createResource("some URI") and reuse
> myResource as often as needed.
I get some resources from a model. I suspect that in this case they
would be sometimes duplicate.
> What is the purpose of adding Jena resources to a Guava graph? It
> seems plausible that you are duplicating functionality found in Jena.
I need to check such things as whether there is a path from node A to
node B. Or I need to relationally compose two graphs.
Well, I've just discovered that Guava does not directly support such
operations. I need another graph library with support of more complex
operations.
> ajs6f
>
> > On Dec 27, 2017, at 12:41 PM, Victor Porton <[email protected]>
> > wrote:
> >
> > From https://github.com/google/guava/wiki/GraphsExplained :
> >
> > don't construct multiple elements that are equal to each other and
> > expect them to be interchangeable. In particular, when adding such
> > elements to a graph, you should create them once and store the
> > reference if you will need to refer to those elements more than
> > once
> > during creation (rather than passing new MyMutableNode(id) to each
> > add*() call).
> >
> > But I want a graph whose vertices are Resource from Jena. Because
> > one
> > resource may be met in a model multiple times, I expect that Jena
> > will
> > give me multiple instances of Resource with the same URL. What to
> > do?
> > How can I make a graph with Resource as vertices?
> >
> > Please help.
>
>
