/*
 * Copyright (C) 2023 Google LLC
 *
 * Licensed 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 com.google.cloud.teleport.v2.templates.bigtablechangestreamstogcs;

import com.google.cloud.bigtable.data.v2.models.ChangeStreamMutation;
import java.util.List;
import org.apache.beam.sdk.transforms.SimpleFunction;

/**
 * Class used as a {@link org.apache.beam.sdk.transforms.PTransform} to get valid {@link
 * com.google.cloud.teleport.bigtable.ChangelogEntry} objects based on the parameters provided by
 * the pipeline.
 */
public class BigtableChangeStreamMutationToChangelogEntryFn
    extends SimpleFunction<
        ChangeStreamMutation, List<com.google.cloud.teleport.bigtable.ChangelogEntry>> {

  private final BigtableUtils bigtableUtils;

  public BigtableChangeStreamMutationToChangelogEntryFn(BigtableUtils bigtableUtils) {
    this.bigtableUtils = bigtableUtils;
  }

  @Override
  public List<com.google.cloud.teleport.bigtable.ChangelogEntry> apply(
      ChangeStreamMutation mutation) {
    return this.bigtableUtils.getValidEntries(mutation);
  }
}
