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;
  
  import java.util.Map;
  import org.apache.beam.sdk.runners.PTransformOverrideFactory;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PValue;
  import org.apache.beam.sdk.values.TupleTag;
  
  /**
   * A {@link PTransformOverrideFactory} which consumes from a {@link PValue} and produces a {@link
   * PValue}. {@link #mapOutputs(Map, PValue)} is implemented.
   */
  public abstract class SingleInputOutputOverrideFactory<
          InputT extends PValue,
          OutputT extends PValue,
          TransformT extends PTransform<InputT, OutputT>>
      implements PTransformOverrideFactory<InputT, OutputT, TransformT> {
    @Override
    public final Map<PCollection<?>, ReplacementOutput> mapOutputs(
        Map<TupleTag<?>, PCollection<?>> outputs, OutputT newOutput) {
      return ReplacementOutputs.singleton(outputs, newOutput);
    }
  }
  