com.tribbloids.spookystuff.actions.ActionLike.scala Maven / Gradle / Ivy

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package com.tribbloids.spookystuff.actions

import com.tribbloids.spookystuff.entity.PageRow
import com.tribbloids.spookystuff.pages.PageLike
import com.tribbloids.spookystuff.session.Session

/**
 * Created by peng on 11/7/14.
 */
trait ActionLike extends Serializable {

  final def interpolate(pr: PageRow): Option[this.type] = {
    val option = this.doInterpolate(pr)
    option.foreach(action => action.injectFrom(this))
    option
  }

  def doInterpolate(pageRow: PageRow): Option[this.type] = Some(this)

  def injectFrom(same: ActionLike): Unit = {} //TODO: change to immutable pattern to avoid one Trace being used twice with different names

  final def injectTo(same: ActionLike): Unit = same.injectFrom(this)

  //used to determine if snapshot needs to be appended or if possible to be executed lazily
  final def hasOutput: Boolean = outputNames.nonEmpty

  def outputNames: Set[String]

  //the minimal equivalent action that can be put into backtrace
  def trunk: Option[this.type]

  def apply(session: Session): Seq[PageLike]
}