/*
* 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.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.function.AccumulatorStateSerializer;
import com.facebook.presto.spi.type.Type;
public class BlockStateSerializer
implements AccumulatorStateSerializer<BlockState>
{
private final Type type;
public BlockStateSerializer(Type type)
{
this.type = type;
}
@Override
public Type getSerializedType()
{
return type;
}
@Override
public void serialize(BlockState state, BlockBuilder out)
{
if (state.getBlock() == null) {
out.appendNull();
}
else {
type.writeObject(out, state.getBlock());
}
}
@Override
public void deserialize(Block block, int index, BlockState state)
{
state.setBlock((Block) type.getObject(block, index));
}
}