gistfile1.scala

// Best of both worlds - WebObjects + Scala

// valueForKeyPath operators
def parameters: NSArray[Parameter] = ...
def maxSortOrder = parameters.valueForKeyPath("sortOrder.@max").asInstanceOf[Int]

// Clone attributes of an EnterpriseObject (aka DB row with all non-relationship columns)
trait Cloning extends EOEnterpriseObject {
  type EOType <: EOEnterpriseObject

  def attributesWithoutNull = for (attributeKey <- attributeKeys toList; if valueForKey(attributeKey) != null) yield attributeKey

  def cloneEO: EOType = {
    val clone = ERXEOControlUtilities.createAndInsertObject(editingContext, entityName).asInstanceOf[EOType]
    val thisSnapshot = snapshot
    for (key <- attributesWithoutNull) clone.takeValueForKey(thisSnapshot.valueForKey(key), key)
    clone
  }
}