/*
* 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;
import com.facebook.presto.spi.type.UnscaledDecimal128Arithmetic;
import io.airlift.slice.Slice;
import io.airlift.slice.SliceInput;
import io.airlift.slice.SliceOutput;
import io.airlift.slice.Slices;
import static com.facebook.presto.spi.type.VarbinaryType.VARBINARY;
public class LongDecimalWithOverflowStateSerializer
implements AccumulatorStateSerializer<LongDecimalWithOverflowState>
{
@Override
public Type getSerializedType()
{
return VARBINARY;
}
@Override
public void serialize(LongDecimalWithOverflowState state, BlockBuilder out)
{
if (state.getLongDecimal() == null) {
out.appendNull();
}
else {
Slice slice = Slices.allocate(Long.BYTES + UnscaledDecimal128Arithmetic.UNSCALED_DECIMAL_128_SLICE_LENGTH);
SliceOutput output = slice.getOutput();
output.writeLong(state.getOverflow());
output.writeBytes(state.getLongDecimal());
VARBINARY.writeSlice(out, slice);
}
}
@Override
public void deserialize(Block block, int index, LongDecimalWithOverflowState state)
{
if (!block.isNull(index)) {
SliceInput slice = VARBINARY.getSlice(block, index).getInput();
state.setOverflow(slice.readLong());
state.setLongDecimal(Slices.copyOf(slice.readSlice(slice.available())));
}
}
}