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.bigtable;
  
  import com.google.auto.service.AutoService;
  import org.apache.beam.sdk.annotations.Internal;
  import org.apache.beam.sdk.extensions.sql.meta.BeamSqlTable;
  import org.apache.beam.sdk.extensions.sql.meta.Table;
  import org.apache.beam.sdk.extensions.sql.meta.provider.InMemoryMetaTableProvider;
  import org.apache.beam.sdk.extensions.sql.meta.provider.TableProvider;
  
  /**
   * {@link TableProvider} for {@link BigtableTable}.
   *
   * <p>A sample of BigTable table is:
   *
   * <pre>{@code
   *   CREATE EXTERNAL TABLE beamTable(
   *     key VARCHAR NOT NULL,
   *     familyTest ROW<
   *       boolColumn BOOLEAN NOT NULL,
   *       longColumnWithTsAndLabels ROW<
   *         val BIGINT NOT NULL,
   *         timestampMicros BIGINT NOT NULL,
   *         labels VARCHAR
   *       > NOT NULL,
   *       stringArrayColumn ARRAY<VARCHAR> NOT NULL,
   *       doubleColumn DOUBLE NOT NULL,
   *       binaryColumn BINARY NOT NULL
   *     > NOT NULL
   *   )
   *   TYPE 'bigtable'
   *   LOCATION 'googleapis.com/bigtable/projects/<project_id>/instances/<instance_id>/tables/<table_name>'
   * </pre>
   *
   * <p>Flat-schema table is also supported. It requires an additional property "columnsMapping" which
   * describes which familyColumn describes which value in the form "familyName:columnQualifier":
   *
   * <pre>{@code
   *   CREATE EXTERNAL TABLE beamTable(
   *     key VARCHAR NOT NULL,
   *     boolColumn BOOLEAN NOT NULL,
   *     longColumn BIGINT NOT NULL,
   *     stringColumn VARCHAR NOT NULL,
   *     doubleColumn DOUBLE NOT NULL,
   *     binaryColumn BINARY NOT NULL
   *   )
   *   TYPE 'bigtable'
   *   LOCATION 'googleapis.com/bigtable/projects/<project_id>/instances/<instance_id>/tables/<table_name>'
   *   TBLPROPERTIES '{
   *     "columnsMapping": "f:boolColumn,f:longColumn,f:stringColumn,f2:doubleColumn,f2:binaryColumn"
   *   }'
   * </pre>
   */
  @Internal
  @AutoService(TableProvider.class)
  public class BigtableTableProvider extends InMemoryMetaTableProvider {
  
    @Override
    public String getTableType() {
      return "bigtable";
    }
  
    @Override
    public BeamSqlTable buildBeamSqlTable(Table table) {
      return new BigtableTable(table);
    }
  }
  