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.translation;
  
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  import org.apache.beam.runners.fnexecution.provisioning.JobInfo;
  import org.apache.beam.runners.samza.SamzaPipelineOptions;
  import org.apache.beam.runners.samza.runtime.OpMessage;
  import org.apache.beam.sdk.util.construction.graph.PipelineNode;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Iterables;
  import org.apache.samza.application.descriptors.StreamApplicationDescriptor;
  import org.apache.samza.operators.KV;
  import org.apache.samza.operators.MessageStream;
  import org.apache.samza.system.descriptors.InputDescriptor;
  
  /**
   * Helper that keeps the mapping from BEAM PCollection id to Samza {@link MessageStream}. It also
   * provides other context data such as input and output of a {@link
   * org.apache.beam.model.pipeline.v1.RunnerApi.PTransform}.
   */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class PortableTranslationContext extends TranslationContext {
    private final Map<String, MessageStream<?>> messageStreams = new HashMap<>();
    private final JobInfo jobInfo;
  
    private PipelineNode.PTransformNode currentTransform;
  
    public PortableTranslationContext(
        StreamApplicationDescriptor appDescriptor, SamzaPipelineOptions options, JobInfo jobInfo) {
      super(appDescriptor, Collections.emptyMap(), Collections.emptySet(), options);
      this.jobInfo = jobInfo;
    }
  
    public <T> List<MessageStream<OpMessage<T>>> getAllInputMessageStreams(
        PipelineNode.PTransformNode transform) {
      final Collection<String> inputStreamIds = transform.getTransform().getInputsMap().values();
      return inputStreamIds.stream().map(this::<T>getMessageStreamById).collect(Collectors.toList());
    }
  
    public <T> MessageStream<OpMessage<T>> getOneInputMessageStream(
        PipelineNode.PTransformNode transform) {
      String id = Iterables.getOnlyElement(transform.getTransform().getInputsMap().values());
      return getMessageStreamById(id);
    }
  
    @SuppressWarnings("unchecked")
    public <T> MessageStream<OpMessage<T>> getMessageStreamById(String id) {
      return (MessageStream<OpMessage<T>>) messageStreams.get(id);
    }
  
    public String getInputId(PipelineNode.PTransformNode transform) {
      return Iterables.getOnlyElement(transform.getTransform().getInputsMap().values());
    }
  
    public String getOutputId(PipelineNode.PTransformNode transform) {
      return Iterables.getOnlyElement(transform.getTransform().getOutputsMap().values());
    }
  
    public JobInfo getJobInfo() {
      return jobInfo;
    }
  
    public <T> void registerMessageStream(String id, MessageStream<OpMessage<T>> stream) {
      if (messageStreams.containsKey(id)) {
        throw new IllegalArgumentException("Stream already registered for id: " + id);
      }
      messageStreams.put(id, stream);
    }
  
    /** Register an input stream with certain config id. */
    public <T> void registerInputMessageStream(
        String id, InputDescriptor<KV<?, OpMessage<T>>, ?> inputDescriptor) {
      registerInputMessageStreams(id, Collections.singletonList(inputDescriptor));
    }
  
    public <T> void registerInputMessageStreams(
        String id, List<? extends InputDescriptor<KV<?, OpMessage<T>>, ?>> inputDescriptors) {
      registerInputMessageStreams(id, inputDescriptors, this::registerMessageStream);
    }
  
    public void setCurrentTransform(PipelineNode.PTransformNode currentTransform) {
      this.currentTransform = currentTransform;
    }
  
    @Override
    public void clearCurrentTransform() {
      this.currentTransform = null;
    }
  
    @Override
    public String getTransformFullName() {
      return currentTransform.getTransform().getUniqueName();
    }
  }
  