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.hcatalog;
  
  import com.google.auto.value.AutoValue;
  import java.util.Map;
  import org.apache.beam.sdk.extensions.sql.meta.BaseBeamTable;
  import org.apache.beam.sdk.io.hcatalog.HCatToRow;
  import org.apache.beam.sdk.io.hcatalog.HCatalogIO;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.values.PBegin;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.POutput;
  import org.apache.beam.sdk.values.Row;
  
  /**
   * Beam SQL table that wraps {@link HCatalogIO}.
   *
   * <p>Reads {@code HCatRecords} and converts them to {@link Row Rows}.
   */
  @AutoValue
  public abstract class HCatalogTable extends BaseBeamTable {
  
    public abstract Schema schema();
  
    public abstract Map<String, String> config();
  
    public abstract String database();
  
    public abstract String table();
  
    @Override
    public PCollection<Row> buildIOReader(PBegin begin) {
      return begin.apply(
          "HCatalog-Read-" + database() + "-" + table(),
          HCatToRow.fromSpec(
              HCatalogIO.read()
                  .withConfigProperties(config())
                  .withDatabase(database())
                  .withTable(table())));
    }
  
    @Override
    public POutput buildIOWriter(PCollection<Row> input) {
      throw new UnsupportedOperationException("Writing to HCatalog is not supported in Beam SQL");
    }
  
    @Override
    public PCollection.IsBounded isBounded() {
      return PCollection.IsBounded.BOUNDED;
    }
  
    @Override
    public Schema getSchema() {
      return schema();
    }
  
    static Builder builder() {
      return new AutoValue_HCatalogTable.Builder();
    }
  
    @AutoValue.Builder
    abstract static class Builder {
  
      abstract Builder setSchema(Schema schema);
  
      abstract Builder setConfig(Map<String, String> config);
  
      abstract Builder setDatabase(String database);
  
      abstract Builder setTable(String table);
  
      abstract HCatalogTable build();
    }
  }
  