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package atom.kie

import javax.jcr.query.Query.JCR_SQL2

import atom.app.{Kie, RichActivity}
import atom.content.Jcr
import atom.kie.SetGroupControllerTask.{BUNDLE, GROUP, QUERY, TEMPLATE}
import atom.view.{JcrGroupController, ResourceBundleFilter, ViewGroup}
import org.kie.api.runtime.process.{WorkItem, WorkItemManager}
import org.kie.internal.runtime.StatefulKnowledgeSession

import scala.collection.JavaConversions.collectionAsScalaIterable

/**
 * Set Controller Task Work Item Handler with KIE session.
 *
 * @param ksession текущая сессия KIE
 * @author Alex Voloshyn
 * @version 1.1 3/10/15
 */
class SetGroupControllerTask(ksession: StatefulKnowledgeSession)
  extends AbstractControllerTask(ksession)
  with Kie with Jcr with RichActivity {
  override val session: StatefulKnowledgeSession = ksession

  override def executeWorkItem(workItem: WorkItem,
                               manager: WorkItemManager): Unit = {
    implicit val item = workItem
    implicit val activity = getActivity
    val view: ViewGroup = findViewById(get(GROUP))
    val template = inflate(get(TEMPLATE))
    val queryManager = activity.getJcrSession.getWorkspace.getQueryManager
    val query = queryManager.createQuery(get(QUERY), JCR_SQL2).execute()
    option(BUNDLE) match {
      case value: Some[String] =>
        view.setGroupController(JcrGroupController(template, query,
          Some(ResourceBundleFilter(value.get, locale, loader))))
      case None => view.setGroupController(JcrGroupController(template, query))
    }
    view.getChildren foreach (view =>
      applyEventListeners(activity, view, workItem.getParameters))
    complete(manager)
  }
}

object SetGroupControllerTask {
  /**
   * Имя переменной идентификатора группы представлений.
   */
  val GROUP = "group"
  /**
   * Путь к шаблону представления для результатов выполнения зароса.
   */
  val TEMPLATE = "template"
  /**
   * SQL запрос к данным хранилища.
   */
  val QUERY = "query"
  /**
   * Название пакета статических ресурсов.
   */
  val BUNDLE = "bundle"
}