/*
 * 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.direct;

import org.apache.beam.runners.core.KeyedWorkItem;
import org.apache.beam.runners.core.SplittableParDoViaKeyedWorkItems.GBKIntoKeyedWorkItems;
import org.apache.beam.runners.core.construction.PTransformReplacements;
import org.apache.beam.runners.core.construction.SingleInputOutputOverrideFactory;
import org.apache.beam.sdk.runners.AppliedPTransform;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollection;

/** Provides an implementation of {@link GBKIntoKeyedWorkItems} for the Direct Runner. */
class DirectGBKIntoKeyedWorkItemsOverrideFactory<KeyT, InputT>
    extends SingleInputOutputOverrideFactory<
        PCollection<KV<KeyT, InputT>>,
        PCollection<KeyedWorkItem<KeyT, InputT>>,
        GBKIntoKeyedWorkItems<KeyT, InputT>> {
  @Override
  public PTransformReplacement<
          PCollection<KV<KeyT, InputT>>, PCollection<KeyedWorkItem<KeyT, InputT>>>
      getReplacementTransform(
          AppliedPTransform<
                  PCollection<KV<KeyT, InputT>>,
                  PCollection<KeyedWorkItem<KeyT, InputT>>,
                  GBKIntoKeyedWorkItems<KeyT, InputT>>
              transform) {
    return PTransformReplacement.of(
        PTransformReplacements.getSingletonMainInput(transform),
        new DirectGroupByKey.DirectGroupByKeyOnly<>());
  }
}
