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.runners.samza.util;
  
  import java.io.IOException;
  import org.apache.beam.model.pipeline.v1.RunnerApi;
  import org.apache.beam.runners.fnexecution.wire.WireCoders;
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.util.construction.RehydratedComponents;
  import org.apache.beam.sdk.util.construction.WindowingStrategyTranslation;
  import org.apache.beam.sdk.util.construction.graph.PipelineNode;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.beam.sdk.values.WindowingStrategy;
  
  /** Utils for window operations. */
  public class WindowUtils {
  
    /** Get {@link WindowingStrategy} of given collection id from {@link RunnerApi.Components}. */
    public static WindowingStrategy<?, BoundedWindow> getWindowStrategy(
        String collectionId, RunnerApi.Components components) {
      RehydratedComponents rehydratedComponents = RehydratedComponents.forComponents(components);
  
      RunnerApi.WindowingStrategy windowingStrategyProto =
          components.getWindowingStrategiesOrThrow(
              components.getPcollectionsOrThrow(collectionId).getWindowingStrategyId());
  
      WindowingStrategy<?, ?> windowingStrategy;
      try {
        windowingStrategy =
            WindowingStrategyTranslation.fromProto(windowingStrategyProto, rehydratedComponents);
      } catch (Exception e) {
        throw new IllegalStateException(
            String.format(
                "Unable to hydrate GroupByKey windowing strategy %s.", windowingStrategyProto),
            e);
      }
  
      @SuppressWarnings("unchecked")
      WindowingStrategy<?, BoundedWindow> ret =
          (WindowingStrategy<?, BoundedWindow>) windowingStrategy;
      return ret;
    }
  
    /**
     * Instantiate {@link WindowedValues.WindowedValueCoder} for given collection id from {@link
     * RunnerApi.Components}.
     */
    public static <T> WindowedValues.WindowedValueCoder<T> instantiateWindowedCoder(
        String collectionId, RunnerApi.Components components) {
      PipelineNode.PCollectionNode collectionNode =
          PipelineNode.pCollection(collectionId, components.getPcollectionsOrThrow(collectionId));
      try {
        return (WindowedValues.WindowedValueCoder<T>)
            WireCoders.<T>instantiateRunnerWireCoder(collectionNode, components);
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
  }
  