Which XML serialization library for Scala?

Question

I'm looking for xml serialization library for scala. For json serialization I use lift-json, and would like my xml serialization library to be similar, that means:

automatic serialization of case classes (without any format definition)
smart serialization of scala types: collections, options etc.
ability to define formats for other datatypes to adjust a way they are serialized
deserialization not based on implicits but rather on class name (sometimes I have only class/class name of type which must be deserialized)

Do you know if such library exists?

score 5 · Answer 1 · edited Mar 22 '12 at 15:59

One great alternative is to use the pure Java library XStream.

This works with case classes out of the box, with some tweaking - I'm using the class XStreamConversions from mixedbits-webframework -, it also works with List, Tuple, Symbol, ListBuffer and ArrayBuffer. So it's not perfect, but you can surely fine tune it for your specific needs.
Here is a small example.

    import com.thoughtworks.xstream.XStream
    import com.thoughtworks.xstream.io.xml.StaxDriver
    import net.mixedbits.tools.XStreamConversions

    case class Bar(a:String)
    case class Foo(a:String,b:Int,bar:Seq[Bar])

    object XStreamDemo {
      def main(args: Array[String]) {
            val xstream = XStreamConversions(new XStream(new StaxDriver()))
            xstream.alias("foo", classOf[Foo])
            xstream.alias("bar", classOf[Bar])
            val f0 = Foo("foo", 1, List(Bar("bar1"),Bar("bar2")))

            val xml = xstream.toXML(f0)
            println(xml)

            val f1 = xstream.fromXML(xml)
            println(f1)
            println(f1 == f0)
      }
    }

This produces the following output:

    <?xml version="1.0" ?><foo><a>foo</a><b>1</b><bar class="list"><bar><a>bar1</a></bar><bar><a>bar2</a></bar></bar></foo>
    Foo(foo,1,List(Bar(bar1), Bar(bar2)))
    true

For Java 1.6 / Scala 2.9 the dependencies are the xstream.jar file and the mentioned XStreamConversions class.

Bad thing about this method is lack of handling of `Option[]` — expert, May 19 '13 at 03:50

score 4 · Answer 2 · answered Feb 11 '11 at 09:32

4

Try scalaxb

answered Feb 11 '11 at 09:32

Vasil Remeniuk

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Scalaxb coverts xsd files to scala classes. But I have scala classes and would like to serialize them. – Wojciech Durczyński Feb 11 '11 at 11:37

Which XML serialization library for Scala?

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