parquet-hive/parquet-hive-storage-handler/src/main/java/org/apache/hadoop/hive/ql/io/parquet/convert/HiveGroupConverter.java

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

import org.apache.hadoop.io.Writable;

import org.apache.parquet.io.api.Converter;
import org.apache.parquet.io.api.GroupConverter;
import org.apache.parquet.schema.Type;
import org.apache.parquet.schema.Type.Repetition;

public abstract class HiveGroupConverter extends GroupConverter {

  protected static Converter getConverterFromDescription(final Type type, final int index,
      final HiveGroupConverter parent) {
    if (type == null) {
      return null;
    }
    if (type.isPrimitive()) {
      return ETypeConverter.getNewConverter(type.asPrimitiveType().getPrimitiveTypeName().javaType,
          index, parent);
    } else {
      if (type.asGroupType().getRepetition() == Repetition.REPEATED) {
        return new ArrayWritableGroupConverter(type.asGroupType(), parent, index);
      } else {
        return new DataWritableGroupConverter(type.asGroupType(), parent, index);
      }
    }
  }

  protected abstract void set(int index, Writable value);

  protected abstract void add(int index, Writable value);

}