io.trino.operator.aggregation.state.BlockPositionStateSerializer 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.state;
import io.trino.spi.block.Block;
import io.trino.spi.block.BlockBuilder;
import io.trino.spi.function.AccumulatorStateSerializer;
import io.trino.spi.type.Type;
public class BlockPositionStateSerializer
implements AccumulatorStateSerializer
{
private final Type type;
public BlockPositionStateSerializer(Type type)
{
this.type = type;
}
@Override
public Type getSerializedType()
{
return type;
}
@Override
public void serialize(BlockPositionState state, BlockBuilder out)
{
if (state.getBlock() == null) {
out.appendNull();
}
else {
type.appendTo(state.getBlock(), state.getPosition(), out);
}
}
@Override
public void deserialize(Block block, int index, BlockPositionState state)
{
// Use the original serialized block as the underlying block for the state to save object creation overhead
state.setPosition(index);
state.setBlock(block);
}
}