/*
* 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.operator.aggregation.KeyValuePairs;
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;
import com.facebook.presto.type.MapType;
public class KeyValuePairStateSerializer
implements AccumulatorStateSerializer<KeyValuePairsState>
{
private final MapType mapType;
public KeyValuePairStateSerializer(MapType mapType)
{
this.mapType = mapType;
}
@Override
public Type getSerializedType()
{
return mapType;
}
@Override
public void serialize(KeyValuePairsState state, BlockBuilder out)
{
if (state.get() == null) {
out.appendNull();
}
else {
state.get().serialize(out);
}
}
@Override
public void deserialize(Block block, int index, KeyValuePairsState state)
{
state.set(new KeyValuePairs(mapType.getObject(block, index), state.getKeyType(), state.getValueType()));
}
}