/*
* 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.hive;
import com.facebook.presto.spi.BucketFunction;
import com.facebook.presto.spi.Page;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import java.util.List;
import java.util.stream.Collectors;
import static com.google.common.base.MoreObjects.toStringHelper;
import static java.util.Objects.requireNonNull;
public class HiveBucketFunction
implements BucketFunction
{
private final int bucketCount;
private final List<TypeInfo> typeInfos;
public HiveBucketFunction(int bucketCount, List<HiveType> hiveTypes)
{
this.bucketCount = bucketCount;
this.typeInfos = requireNonNull(hiveTypes, "hiveTypes is null").stream()
.map(HiveType::getTypeInfo)
.collect(Collectors.toList());
}
@Override
public int getBucket(Page page, int position)
{
return HiveBucketing.getHiveBucket(typeInfos, page, position, bucketCount);
}
@Override
public String toString()
{
return toStringHelper(this)
.add("bucketCount", bucketCount)
.add("typeInfos", typeInfos)
.toString();
}
}