org.apache.hadoop.hive.ql.io.parquet.convert.DataWritableRecordConverter Maven / Gradle / Ivy

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/**
 * 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 org.apache.hadoop.hive.ql.io.parquet.convert;

import org.apache.hadoop.hive.ql.io.parquet.read.DataWritableReadSupport;
import org.apache.hadoop.io.ArrayWritable;
import parquet.io.api.GroupConverter;
import parquet.io.api.RecordMaterializer;
import parquet.schema.GroupType;
import parquet.schema.MessageTypeParser;

import java.util.Map;

/**
 *
 * A MapWritableReadSupport, encapsulates the tuples
 *
 */
public class DataWritableRecordConverter extends RecordMaterializer {

  private final HiveStructConverter root;

  public DataWritableRecordConverter(final GroupType requestedSchema, final Map metadata) {
    this.root = new HiveStructConverter(requestedSchema,
      MessageTypeParser.parseMessageType(metadata.get(DataWritableReadSupport.HIVE_TABLE_AS_PARQUET_SCHEMA)), metadata);
  }

  @Override
  public ArrayWritable getCurrentRecord() {
    return root.getCurrentArray();
  }

  @Override
  public GroupConverter getRootConverter() {
    return root;
  }
}