content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.beam.sdk.util.construction.graph;
  
  import com.google.auto.value.AutoValue;
  import org.apache.beam.model.pipeline.v1.RunnerApi;
  
  /**
   * Contains references to components relevant for runners during execution for timers. The
   * referenced PTransform specifies the timer specification while the PCollection specifies the
   * encoding representation.
   */
  @AutoValue
  public abstract class TimerReference {
  
    /** Create a timer reference. */
    public static TimerReference of(PipelineNode.PTransformNode transform, String localName) {
      return new AutoValue_TimerReference(transform, localName);
    }
  
    /** Create a timer reference from a TimerId proto and components. */
    public static TimerReference fromTimerId(
        RunnerApi.ExecutableStagePayload.TimerId timerId, RunnerApi.Components components) {
      String transformId = timerId.getTransformId();
      String localName = timerId.getLocalName();
      RunnerApi.PTransform transform = components.getTransformsOrThrow(transformId);
      return of(PipelineNode.pTransform(transformId, transform), localName);
    }
  
    /** The PTransform that uses this timer. */
    public abstract PipelineNode.PTransformNode transform();
    /** The local name the referencing PTransform uses to refer to this timer. */
    public abstract String localName();
  }
  