XML and Case Class

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本文介绍如何使用XStream库进行Scala Case Class与XML之间的序列化和反序列化操作。通过具体示例展示了如何配置XStream来处理自定义类，并提供测试用例验证转换的正确性。

XML and Case Class

I compare the library scalaxb and XStream. It seems to me that XStream is more easy to use.

Here is first step to add the dependencies.
"com.thoughtworks.xstream" % "xstream" % "1.4.8",
"org.joda" % "joda-convert" % "1.7",

The Trait object to deal with the xstream base class.
package com.sillycat.jobsconsumer.utilities

import com.sillycat.jobsconsumer.models.Job
import com.thoughtworks.xstream.XStream
import com.thoughtworks.xstream.io.xml.DomDriver

trait IncludeXMLMapping {

var xStream : XStream = new XStream(new DomDriver())

xStream.alias("job", classOf[Job])

def toXML(obj:Any): String ={
xStream.toXML(obj)
}

def fromXML(xml:String):Any = {
xStream.fromXML(xml)
}

}

Here is the Test Class
package com.sillycat.jobsconsumer.models

import com.sillycat.jobsconsumer.utilities.{IncludeXMLMapping}
import org.scalatest.{BeforeAndAfter, Matchers, FunSpec}

class JobXMLSpec extends FunSpec with Matchers with BeforeAndAfter with IncludeXMLMapping {

describe("JobXMLMapping") {
describe("#xml2object"){
it("Convert xml string to object") {
val xml =
"""<job>
| <id>id1</id>
| <title>title1</title>
| <desc>desc1</desc>
| <industry>sales</industry>
|</job>""".stripMargin
val job1 = fromXML(xml).asInstanceOf[Job]
job1.title should be ("title1")
}
}
describe("#object2xml"){
it("Convert object to xml string") {
val job1 = Job("id1","title1","desc1","sales")
val expect =
"""<job>
| <id>id1</id>
| <title>title1</title>
| <desc>desc1</desc>
| <industry>sales</industry>
|</job>""".stripMargin
val xml = toXML(job1)
xml should be (expect)
}
}
}

}

Tip
Warning Message
[warn] Class java.time.Duration not found - continuing with a stub.
[warn] Class java.time.Duration not found - continuing with a stub.
[warn] two warnings found

Solution:
Adding package dependency fixes the problem.
"org.joda" % "joda-convert" % "1.7",

References:
http://x-stream.github.io/tutorial.html
http://alvinalexander.com/scala/serializing-deserializing-xml-scala-classes

xml to object
https://github.com/takezoe/solr-scala-client

case class mapper
https://github.com/takezoe/solr-scala-client/blob/master/src/main/scala/jp/sf/amateras/solr/scala/CaseClassMapper.scala