Scala xml : dependency between attributes

Question

Our application receives an XML message from another system. The XML is structured like this:

<params>
  <param name="FOO" value="BAR"/>
  ...
</params>

What is the best way, using Scala's native XML processing, to return the value BAR for the parameter which is FOO, so that:

val foo = "BAR"

Thanks

ars · Accepted Answer · 2016-05-16 11:45:41Z

1

I assume your xml is invalid with missing param closing tag, it should be, for example

var x = <params>
  <param name="FOO" value="BAR" />
  <param name="FOO2" value="BAR2" />
</params>

If you want to extract the only param FOO, I don't think you will find anything much better than

(x \ "param" find (n => (n \ "@name").toString == "FOO")).get \ "@value"

If you want to get all params, you can iterate over them:

x \ "param" foreach {n => println(n \ "@name" + " -> " + n \ "@value")}

answered May 16, 2016 at 11:39

ars

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