Property[Double] and Property[DateTime] for Vocabulary Class

[Banduk]

Hi guys,

I am interested in extend the Vocabulary class to accept Property[Double] and Property[DateTime]

I extended and implemented the following functions:

    def propDoub( suffix : String ) = Property[Double]( prefix + suffix )

  def propTime( suffix : String ) = Property[DateTime]( prefix + suffix )

However, when trying to use them I receive the following message:
  

  java.lang.IllegalArgumentException: Cannot convert 30.0 of class java.lang.Double to Node

How to extend it correctly??

Thank you

[Hrvoje Šimić]

Note that method Property.apply has this signature:

apply[T]( uri: String )( implicit nc: NodeToValueConverter[T] )

so it requires a (implicit or explicit) node-to-value converter
object. So you can import NodeConverter.asDouble and .asDateTime
methods, or use them explicitly.

[Mauricio Banduk]

Right, it worked!

Now, If I create a propInt or a propDouble, how to get this type after??
I mean, if I receive a property without its object and subject, is there a way to know its type?

I tryed something like

if (prop.isInstanceOf[Property[Int]]){...}

else if (prop.isInstanceOf[Property[BigDecimal]]){..}

...

But, of course it did not work.

Thank you

2012/3/20 Hrvoje Šimić <hrvoj...@gmail.com>

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Maurício Banduk

[Mauricio Banduk]

Well, I can try to test its converter, right?

is it the best way?

2012/3/22 Mauricio Banduk <ban...@gmail.com>

--

Maurício Banduk

[Hrvoje Šimić]

I guess you could do that, although it's not a part of the API, so
future versions could possibly break your code.

[Mauricio Banduk]

Ok that's what I'm doing. 

BTW are you planning to have something that covers this functionallity on future versions?

Thank you again

2012/3/22 Hrvoje Šimić <hrvoj...@gmail.com>

--

Maurício Banduk

[Hrvoje Šimić]

No plans for this at the moment. I guess you could make special
subclasses of Property for each range type, but I haven't really
looked at the problem. It seems to me that a RDF library shouldn't
provide a parallel ontology with its objects, that should be
integrated with actual statements.