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.coders;
  
  import java.util.Map;
  import java.util.Objects;
  import java.util.UUID;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.schemas.SchemaCoder;
  import org.apache.beam.sdk.transforms.SerializableFunctions;
  import org.apache.beam.sdk.values.Row;
  import org.apache.beam.sdk.values.TypeDescriptors;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.annotations.VisibleForTesting;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /** A sub-class of SchemaCoder that can only encode {@link Row} instances. */
  public class RowCoder extends SchemaCoder<Row> {
    public static RowCoder of(Schema schema) {
      return new RowCoder(schema);
    }
  
    /** Override encoding positions for the given schema. */
    public static void overrideEncodingPositions(UUID uuid, Map<String, Integer> encodingPositions) {
      RowCoderGenerator.overrideEncodingPositions(uuid, encodingPositions);
    }
  
    @VisibleForTesting
    static void clearGeneratedRowCoders() {
      RowCoderGenerator.clearRowCoderCache();
    }
  
    private RowCoder(Schema schema) {
      super(
          schema,
          TypeDescriptors.rows(),
          SerializableFunctions.identity(),
          SerializableFunctions.identity());
    }
  
    @Override
    public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      RowCoder rowCoder = (RowCoder) o;
      return schema.equals(rowCoder.schema);
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(schema);
    }
  }
  