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A module that is everything required to understands Druid Segments

There is a newer version: 0.12.3

/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.query.aggregation;

import java.nio.ByteBuffer;

/**
 */
public class Aggregators
{
  public static Aggregator noopAggregator()
  {
    return new Aggregator()
    {
      @Override
      public void aggregate()
      {

      }

      @Override
      public void reset()
      {

      }

      @Override
      public Object get()
      {
        return null;
      }

      @Override
      public float getFloat()
      {
        return 0;
      }

      @Override
      public String getName()
      {
        return null;
      }

      @Override
      public void close()
      {

      }

      @Override
      public long getLong()
      {
        return 0;
      }
    };
  }

  public static BufferAggregator noopBufferAggregator()
  {
    return new BufferAggregator()
    {
      @Override
      public void init(ByteBuffer buf, int position)
      {

      }

      @Override
      public void aggregate(ByteBuffer buf, int position)
      {

      }

      @Override
      public Object get(ByteBuffer buf, int position)
      {
        return null;
      }

      @Override
      public float getFloat(ByteBuffer buf, int position)
      {
        return 0;
      }


      @Override
      public long getLong(ByteBuffer buf, int position)
      {
        return 0L;
      }

      @Override
      public void close()
      {

      }
    };
  }
}