所以我有这个XMl
<a>blah</a>
我想将其改为
<a>someValueIDoNotKnowAtCompileTime</a>
目前,我正在关注this SO question。但是,这只会将值更改为“2”
我想要的是完全相同的东西,但是能够定义值(以便它可以在运行时更改 - 我正在从文件中读取值!)
我尝试将值传递给重写的方法,但这不起作用 - 在任何地方编译错误(显然)
如何使用动态值更改静态xml?
添加代码
var splitString = someString.split("/t") //where someString is a line from a file
val action = splitString(0)
val ref = splitString(1)
xmlMap.get(action) match { //maps the "action" string to some XML
case Some(entry) => {
val xmlToSend = insertRefIntoXml(ref,entry)
//for the different XML, i want to put the string "ref" in an appropriate place
}
...
答案 0 :(得分:3)
例如:
scala> val x = <foo>Hi</foo>
x: scala.xml.Elem = <foo>Hi</foo>
scala> x match { case <foo>{what}</foo> => <foo>{System.nanoTime}</foo> }
res1: scala.xml.Elem = <foo>213370280150006</foo>
使用链接示例进行更新:
import scala.xml._
import System.{ nanoTime => now }
object Test extends App {
val InputXml : Node =
<root>
<subnode> <version>1</version> </subnode>
<contents> <version>1</version> </contents>
</root>
def substitution = now // whatever you like
def updateVersion(node: Node): Node = node match {
case <root>{ ch @ _* }</root> => <root>{ ch.map(updateVersion )}</root>
case <subnode>{ ch @ _* }</subnode> => <subnode>{ ch.map(updateVersion ) }</subnode>
case <version>{ contents }</version> => <version>{ substitution }</version>
case other @ _ => other
}
val res = updateVersion(InputXml)
val pp = new PrettyPrinter(width = 2, step = 1)
Console println (pp format res)
}