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A module that is everything required to understands Druid Segments

There is a newer version: 30.0.1

/*
 * 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.druid.segment.column;

import org.apache.druid.segment.data.GenericIndexed;

/**
 * Implementation of {@link ComplexColumn} to be used when complex column serialization is done by using
 * {@link GenericIndexed} by using default implementations of "writeToXXX" methods in
 * {@link org.apache.druid.segment.serde.ComplexColumnSerializer}
*/
public class GenericIndexedBasedComplexColumn implements ComplexColumn
{
  private final GenericIndexed index;
  private final String typeName;

  public GenericIndexedBasedComplexColumn(String typeName, GenericIndexed index)
  {
    this.index = index;
    this.typeName = typeName;
  }

  @Override
  public Class getClazz()
  {
    return index.getClazz();
  }

  @Override
  public String getTypeName()
  {
    return typeName;
  }

  @Override
  public Object getRowValue(int rowNum)
  {
    return index.get(rowNum);
  }

  @Override
  public int getLength()
  {
    return -1;
  }

  @Override
  public void close()
  {
  }
}