I want to pass a scala file containing a case class so my application compiles this case class during run time and start using it.
The main reason why I am doing this is because I want to avoid rebuilding my code every time the case class changes. So would be better to pass it as a parameter (in case you are wondered, the operations with this case class are generic so it is not required any rework in the transformations)
I was using the post and this other as references. So far my application looks like this:
import scala.io.Source import scala.reflect.runtime.universe import scala.tools.reflect._
object TestCompile {
def main(args: Array[String]): Unit = {
val path = "C:\\myWorkspace\\entity\\TestClass.scala"
val tb = universe.runtimeMirror(getClass.getClassLoader).mkToolBox()
val src = Source.fromFile(path).mkString.stripMargin
val clazz = tb.compile(tb.parse(src))().asInstanceOf[Class[_]]
}
}
The file TestClass.scala is like this:
case class TestClass(
val value : String,
val timeStamp : Long,
val rowKey : String,
val columnFamily : String
)
But I am getting an exception in
val clazz = tb.compile(tb.parse(src))().asInstanceOf[Class[_]]
Exception:
Exception in thread "main" scala.tools.reflect.ToolBoxError: reflective compilation has failed: cannot initialize the compiler due to java.lang.VerifyError: scala/tools/reflect/ToolBoxFactory$ToolBoxImpl$ToolBoxGlobal at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$api$.liftedTree1$1(ToolBoxFactory.scala:344) at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$api$.compiler$lzycompute(ToolBoxFactory.scala:330) at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$api$.compiler(ToolBoxFactory.scala:329) at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$.liftedTree2$1(ToolBoxFactory.scala:356) at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$.apply(ToolBoxFactory.scala:354) at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl.parse(ToolBoxFactory.scala:413) at TestCompile$.main(App.scala:17) at TestCompile.main(App.scala) Caused by: java.lang.VerifyError: scala/tools/reflect/ToolBoxFactory$ToolBoxImpl$ToolBoxGlobal at scala.tools.reflect.ToolBoxFactory$ToolBoxImpl$withCompilerApi$api$.liftedTree1$1(ToolBoxFactory.scala:334)
Below is the dependency I am using, however I tried with other versions always getting the same error:
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-reflect</artifactId>
<version>2.11.6</version>
</dependency>
What am I doing wrong?
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