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.extensions.sql.meta.provider.test;
  
  import static java.util.stream.Collectors.toList;
  import static org.apache.beam.sdk.schemas.Schema.toSchema;
  import static org.apache.beam.sdk.values.Row.toRow;
  
  import java.util.List;
  import java.util.stream.Stream;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.schemas.Schema.FieldType;
  import org.apache.beam.sdk.values.Row;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.Lists;
  
  /** Utility functions for mock classes. */
  @SuppressWarnings({"keyfor", "nullness"}) // TODO(https://github.com/apache/beam/issues/20497)
  public class TestTableUtils {
  
    /**
     * Create a RowsBuilder with the specified row type info.
     *
     * <p>For example:
     *
     * <pre>{@code
     * TestUtils.RowsBuilder.of(
     *   Types.INTEGER, "order_id",
     *   Types.INTEGER, "sum_site_id",
     *   Types.VARCHAR, "buyer"
     * )
     * }</pre>
     *
     * @param args pairs of column type and column names.
     */
    public static Schema buildBeamSqlSchema(Object... args) {
      return Stream.iterate(0, i -> i + 2)
          .limit(args.length / 2)
          .map(i -> toRecordField(args, i))
          .collect(toSchema());
    }
  
    public static Schema buildBeamSqlNullableSchema(Object... args) {
      return Stream.iterate(0, i -> i + 3)
          .limit(args.length / 3)
          .map(i -> toNullableRecordField(args, i))
          .collect(toSchema());
    }
  
    // TODO: support nested.
    public static Schema.Field toRecordField(Object[] args, int i) {
      return Schema.Field.of((String) args[i + 1], (FieldType) args[i]);
    }
  
    public static Schema.Field toNullableRecordField(Object[] args, int i) {
      if ((boolean) args[i + 2]) {
        return Schema.Field.nullable((String) args[i + 1], (FieldType) args[i]);
      }
      return Schema.Field.of((String) args[i + 1], (FieldType) args[i]);
    }
  
    /**
     * Convenient way to build a {@code BeamSqlRow}s.
     *
     * <p>e.g.
     *
     * <pre>{@code
     * buildRows(
     *     schema,
     *     1, 1, 1, // the first row
     *     2, 2, 2, // the second row
     *     ...
     * )
     * }</pre>
     */
    public static List<Row> buildRows(Schema type, List<?> rowsValues) {
      return Lists.partition(rowsValues, type.getFieldCount()).stream()
          .map(values -> values.stream().collect(toRow(type)))
          .collect(toList());
    }
  }
  