Re: [jgrapht-users] getVertex(Object o)

[Claudio M. <cla...@gm...>]

thank you john, i ended up extending the Graph with the encapsulation:
good solution.

On Tue, Apr 7, 2009 at 11:14 PM, John V. Sichi <js...@gm...> wrote:
> Your mission, should you choose to accept it, is to get Sun (IBM?) to change
> java.util.Set to allow you to "look up" an object already in the set.  Good
> luck.  JGraphT strives to follow the patterns set by java.util.
>
> For cases like this, I usually take the approach you mention of maintaining
> my own HashMap outside of the graph (in an encapsulating class).  If someone
> wanted to contributed something like a generic "KeyedGraph", that would be
> fine, but I think we should leave the existing interfaces alone.
>
> JVS
>
> Claudio Martella wrote:
>>
>> Hello to the list members.
>>
>> I write for a topic that looks kind of hot in here: the
>> Graph.getVertex() method.
>> I'm using a SimpleDirectedWeightedGraph ecl  to represent words with
>> my own WordNode class and their relationships (with a
>> DefaultWeightedEdge). Each graph vertex (a word for me) has a payload
>> for some statistics (i.e. the number of occurences in the
>> document/corpus).
>>
>> While parsing the document ( or while the application is running ) i
>> want to get access to the node to read its data. I've overidden the
>> .equals() for my WordNode class, so that it actually checks the
>> WordNode.getWord() - String, so the idea is to do a
>> graph.getVertex(new WordNode("whatever")).getOccurences()   without
>> the need to hold all the vertexes in another datastructure (like a
>> HashMap), or without surfing the expensive graph.vertexSet().
>> AFAIK, this is not possible in jgrapht. I don't actually want the
>> getVertex() to work for reference-equality, but for my value-equality
>> through the equals() "interface".
>>
>> Any suggestions?
>>
>> TIA
>>
>> Claudio Martella
>>
>
>



-- 
    Claudio Martella
    cla...@gm...