Error when casting Float to Double and vice versa

[WouterSpekkink]

I noticed that it is no longer possible to cast a Float to a Double or vice versa. For example, if I import coordinates as floats in Gephi, and then try to lay them out with the Geo-Layout plugin, I get the error report as shown in the attachment.

I believe this was not an issue in the previous version of Gephi.

[eduramiba]

Thanks for the report, I think it used to store primitives instead of wrappers. Now the good way is to check that the column is a type of Number and do something like ((Number) object).doubleValue();

[WouterSpekkink]

So is this something we should deal with on the plugin side? I have the same problem with the event graph layout, for which a pull request is running. If there is something I should change there, I could probably do another commit this evening.

[eduramiba]

Sure, ideally you should check that the plugin works with any number type column. Something that might also work is casting to primitive double instead of wrapper.

[WouterSpekkink]

Okay, I think I fixed it for the event-graph-layout, following your suggestion. I just tested it by running Gephi with the plugin, and this time importing something as a float didn't cause an error. I'm not sure if my solution is very pretty, but it would work for the Geo-Layout as well. I use the following code. n refers to a node, as I am using a for-loop to iterate through all nodes in the graph. The ord variable is the double I want the plugin to work with, and order is the Column in which this variable is stored.

ord = ((Number) n.getAttribute(order)).doubleValue();

Works very well. I didn't know the trick with enclosing the entire expression in parentheses yet.

[mbastian]

Thanks folks. The line may not be very pretty but it's perfectly correct and efficient way to do it.

I just checked and the GeoLayout is also doing it this way so I'll close the issue as this must be resolved there as well.