io.trino.operator.aggregation.histogram.HistogramStateSerializer Maven / Gradle / Ivy
/*
* 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 io.trino.operator.aggregation.histogram;
import io.trino.spi.block.Block;
import io.trino.spi.block.BlockBuilder;
import io.trino.spi.block.MapBlockBuilder;
import io.trino.spi.block.SqlMap;
import io.trino.spi.function.AccumulatorStateSerializer;
import io.trino.spi.function.TypeParameter;
import io.trino.spi.type.MapType;
import io.trino.spi.type.Type;
public class HistogramStateSerializer
implements AccumulatorStateSerializer
{
private final MapType serializedType;
public HistogramStateSerializer(@TypeParameter("map(T, BIGINT)") Type serializedType)
{
this.serializedType = (MapType) serializedType;
}
@Override
public Type getSerializedType()
{
return serializedType;
}
@Override
public void serialize(HistogramState state, BlockBuilder out)
{
state.writeAll((MapBlockBuilder) out);
}
@Override
public void deserialize(Block block, int index, HistogramState state)
{
SqlMap sqlMap = serializedType.getObject(block, index);
((SingleHistogramState) state).setTempSerializedState(sqlMap);
}
}