io.druid.query.aggregation.datasketches.theta.EmptySketchBufferAggregator Maven / Gradle / Ivy

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Druid Aggregators based on datasketches lib http://datasketches.github.io/

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.datasketches.theta;

import io.druid.query.aggregation.BufferAggregator;
import io.druid.query.monomorphicprocessing.RuntimeShapeInspector;

import java.nio.ByteBuffer;

public final class EmptySketchBufferAggregator implements BufferAggregator
{
  private static final EmptySketchBufferAggregator INSTANCE = new EmptySketchBufferAggregator();

  public static EmptySketchBufferAggregator instance()
  {
    return INSTANCE;
  }

  private EmptySketchBufferAggregator()
  {
  }

  @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 SketchHolder.EMPTY;
  }

  @Override
  public float getFloat(ByteBuffer buf, int position)
  {
    throw new UnsupportedOperationException("Not implemented");
  }

  @Override
  public long getLong(ByteBuffer buf, int position)
  {
    throw new UnsupportedOperationException("Not implemented");
  }

  @Override
  public void close()
  {
  }

  @Override
  public void inspectRuntimeShape(RuntimeShapeInspector inspector)
  {
    // nothing to inspect
  }
}