/*
* 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.jdbc.internal.type.type;
import com.facebook.presto.jdbc.internal.type.ConnectorSession;
import com.facebook.presto.jdbc.internal.type.block.Block;
import com.facebook.presto.jdbc.internal.type.block.BlockBuilder;
import com.facebook.presto.jdbc.internal.type.block.BlockBuilderStatus;
import com.facebook.presto.jdbc.internal.type.block.VariableWidthBlockBuilder;
import com.facebook.presto.jdbc.internal.jackson.annotation.JsonCreator;
import com.facebook.presto.jdbc.internal.airlift.slice.Slice;
// Layout is <size>:<hll>, where
// size: is a short describing the length of the hll bytes
// hll: is the serialized hll
public class HyperLogLogType
extends AbstractVariableWidthType
{
public static final HyperLogLogType HYPER_LOG_LOG = new HyperLogLogType();
@JsonCreator
public HyperLogLogType()
{
super(StandardTypes.HYPER_LOG_LOG, Slice.class);
}
@Override
public void appendTo(Block block, int position, BlockBuilder blockBuilder)
{
if (block.isNull(position)) {
blockBuilder.appendNull();
}
else {
block.writeBytesTo(position, 0, block.getLength(position), blockBuilder);
blockBuilder.closeEntry();
}
}
@Override
public Slice getSlice(Block block, int position)
{
return block.getSlice(position, 0, block.getLength(position));
}
@Override
public void writeSlice(BlockBuilder blockBuilder, Slice value)
{
writeSlice(blockBuilder, value, 0, value.length());
}
@Override
public void writeSlice(BlockBuilder blockBuilder, Slice value, int offset, int length)
{
blockBuilder.writeBytes(value, offset, length).closeEntry();
}
@Override
public Object getObjectValue(ConnectorSession session, Block block, int position)
{
if (block.isNull(position)) {
return null;
}
return new SqlVarbinary(block.getSlice(position, 0, block.getLength(position)).getBytes());
}
@Override
public BlockBuilder createBlockBuilder(BlockBuilderStatus blockBuilderStatus)
{
return new VariableWidthBlockBuilder(blockBuilderStatus);
}
}