/*
* 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 com.facebook.presto.operator.aggregation.state;
import com.facebook.presto.array.ObjectBigArray;
import com.facebook.presto.spi.function.AccumulatorStateFactory;
import io.airlift.stats.QuantileDigest;
import java.util.List;
import static io.airlift.slice.SizeOf.SIZE_OF_DOUBLE;
import static java.util.Objects.requireNonNull;
public class DigestAndPercentileArrayStateFactory
implements AccumulatorStateFactory<DigestAndPercentileArrayState>
{
@Override
public DigestAndPercentileArrayState createSingleState()
{
return new SingleDigestAndPercentileArrayState();
}
@Override
public Class<? extends DigestAndPercentileArrayState> getSingleStateClass()
{
return SingleDigestAndPercentileArrayState.class;
}
@Override
public DigestAndPercentileArrayState createGroupedState()
{
return new GroupedDigestAndPercentileArrayState();
}
@Override
public Class<? extends DigestAndPercentileArrayState> getGroupedStateClass()
{
return GroupedDigestAndPercentileArrayState.class;
}
public static class GroupedDigestAndPercentileArrayState
extends AbstractGroupedAccumulatorState
implements DigestAndPercentileArrayState
{
private final ObjectBigArray<QuantileDigest> digests = new ObjectBigArray<>();
private final ObjectBigArray<List<Double>> percentilesArray = new ObjectBigArray<>();
private long size;
@Override
public void ensureCapacity(long size)
{
digests.ensureCapacity(size);
percentilesArray.ensureCapacity(size);
}
@Override
public QuantileDigest getDigest()
{
return digests.get(getGroupId());
}
@Override
public void setDigest(QuantileDigest digest)
{
digests.set(getGroupId(), requireNonNull(digest, "digest is null"));
}
@Override
public List<Double> getPercentiles()
{
return percentilesArray.get(getGroupId());
}
@Override
public void setPercentiles(List<Double> percentiles)
{
percentilesArray.set(getGroupId(), requireNonNull(percentiles, "percentiles is null"));
}
@Override
public void addMemoryUsage(int value)
{
size += value;
}
@Override
public long getEstimatedSize()
{
return size + digests.sizeOf() + percentilesArray.sizeOf();
}
}
public static class SingleDigestAndPercentileArrayState
implements DigestAndPercentileArrayState
{
private QuantileDigest digest;
private List<Double> percentiles;
@Override
public QuantileDigest getDigest()
{
return digest;
}
@Override
public void setDigest(QuantileDigest digest)
{
this.digest = requireNonNull(digest, "digest is null");
}
@Override
public List<Double> getPercentiles()
{
return percentiles;
}
@Override
public void setPercentiles(List<Double> percentiles)
{
this.percentiles = requireNonNull(percentiles, "percentiles is null");
}
@Override
public void addMemoryUsage(int value)
{
// noop
}
@Override
public long getEstimatedSize()
{
if (digest == null) {
return SIZE_OF_DOUBLE;
}
return digest.estimatedInMemorySizeInBytes() + SIZE_OF_DOUBLE;
}
}
}