org.camunda.dmn.standalone.StandaloneEngine.scala Maven / Gradle / Ivy

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package org.camunda.dmn.standalone

import org.camunda.dmn.DmnEngine
import org.camunda.dmn.DmnEngine._
import java.io.InputStream

object StandaloneEngine {

  def fileSystemRepository(directory: String): StandaloneEngine = {
    val engine = new DmnEngine
    val repository = new FileSystemRepository(engine, directory)

    new StandaloneEngine(engine, repository)
  }

}

class StandaloneEngine(engine: DmnEngine, repository: DecisionRepository) {

  repository.init

  def evalDecisionById(
      id: String,
      variables: Map[String, Any]): Either[Failure, EvalResult] = {
    repository
      .getDecisionById(id)
      .map(d =>
        engine.eval(d.parsedDmn, id, variables).left.map {
          case EvalFailure(failure, _) => failure
      })
      .getOrElse(Left(Failure(s"No decision found with id '$id'")))
  }

  def evalDecisionByName(
      name: String,
      variables: Map[String, Any]): Either[Failure, EvalResult] = {
    repository
      .getDecisionByName(name)
      .map(d =>
        engine.evalByName(d.parsedDmn, name, variables).left.map {
          case EvalFailure(failure, _) => failure
      })
      .getOrElse(Left(Failure(s"No decision found with name '$name'")))
  }

  def getDecisions: List[DeployedDecision] = repository.getDecisions

  def insertDecisions(
      stream: InputStream,
      resource: String): Either[Failure, List[DeployedDecision]] =
    repository.insertDecisions(stream, resource)

  def removeResource(
      resource: String): Either[Failure, List[DeployedDecision]] =
    repository.removeResource(resource)

}