io.trino.hive.formats.compression.ValueCompressor Maven / Gradle / Ivy
/*
* 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 io.trino.hive.formats.compression;
import io.airlift.compress.hadoop.HadoopStreams;
import io.airlift.slice.DynamicSliceOutput;
import io.airlift.slice.Slice;
import java.io.IOException;
import java.io.OutputStream;
import static java.util.Objects.requireNonNull;
public final class ValueCompressor
{
private final HadoopStreams hadoopStreams;
private final DynamicSliceOutput buffer;
ValueCompressor(HadoopStreams hadoopStreams)
{
this.hadoopStreams = requireNonNull(hadoopStreams, "hadoopStreams is null");
this.buffer = new DynamicSliceOutput(1024);
}
public Slice compress(Slice slice)
throws IOException
{
buffer.reset();
try (OutputStream compressionStream = hadoopStreams.createOutputStream(buffer)) {
slice.getInput().transferTo(compressionStream);
}
return buffer.slice();
}
}