Render lists using jinjava library

Question

Is it possible to render lists using jinjava library?

So far I could only render HashMaps. I'm using the following function to convert case classes to hashmaps.

  def toNestedJavaMap(caseClass: AnyRef): util.Map[String, Any] =
    (new java.util.HashMap[String, Any]() /: caseClass.getClass.getDeclaredFields) { (accumulator, field) =>
      field.setAccessible(true)
      val value = field.get(caseClass) match {
        case caseClassInstance: Product => toNestedJavaMap(caseClassInstance)
        case x => x
      }
      accumulator.put(field.getName, value)
      accumulator
    }

What should I pass as context in order to render things like {% for item in items %} ?

Answer 1

Not sure why I didn't try passing an implementation of the java Iterable interface...

This is the working version modified to take into account the conversion when having Stream alike scala types.

  def toNestedJavaMap(caseClass: AnyRef): util.Map[String, Any] =
    (new java.util.HashMap[String, Any]() /: caseClass.getClass.getDeclaredFields) { (accumulator, field) =>
      field.setAccessible(true)
      val value = field.get(caseClass) match {
        case listInstance: Stream[AnyRef] => listInstance.map(toNestedJavaMap).toList.asJava
        case caseClassInstance: Product => toNestedJavaMap(caseClassInstance)
        case x => x
      }
      accumulator.put(field.getName, value)
      accumulator
    }