io.prestosql.parquet.writer.MapColumnWriter 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.prestosql.parquet.writer;
import com.google.common.collect.ImmutableList;
import io.prestosql.parquet.writer.repdef.DefLevelIterable;
import io.prestosql.parquet.writer.repdef.DefLevelIterables;
import io.prestosql.parquet.writer.repdef.RepLevelIterable;
import io.prestosql.parquet.writer.repdef.RepLevelIterables;
import io.prestosql.spi.block.ColumnarMap;
import org.openjdk.jol.info.ClassLayout;
import java.io.IOException;
import java.util.List;
import static java.util.Objects.requireNonNull;
public class MapColumnWriter
implements ColumnWriter
{
private static final int INSTANCE_SIZE = ClassLayout.parseClass(MapColumnWriter.class).instanceSize();
private final ColumnWriter keyWriter;
private final ColumnWriter valueWriter;
private final int maxDefinitionLevel;
private final int maxRepetitionLevel;
public MapColumnWriter(ColumnWriter keyWriter, ColumnWriter valueWriter, int maxDefinitionLevel, int maxRepetitionLevel)
{
this.keyWriter = requireNonNull(keyWriter, "keyWriter is null");
this.valueWriter = requireNonNull(valueWriter, "valueWriter is null");
this.maxDefinitionLevel = maxDefinitionLevel;
this.maxRepetitionLevel = maxRepetitionLevel;
}
@Override
public void writeBlock(ColumnChunk columnChunk)
throws IOException
{
ColumnarMap columnarMap = ColumnarMap.toColumnarMap(columnChunk.getBlock());
ImmutableList defLevelIterables = ImmutableList.builder()
.addAll(columnChunk.getDefLevelIterables())
.add(DefLevelIterables.of(columnarMap, maxDefinitionLevel)).build();
ImmutableList repLevelIterables = ImmutableList.builder()
.addAll(columnChunk.getRepLevelIterables())
.add(RepLevelIterables.of(columnarMap, maxRepetitionLevel)).build();
keyWriter.writeBlock(new ColumnChunk(columnarMap.getKeysBlock(), defLevelIterables, repLevelIterables));
valueWriter.writeBlock(new ColumnChunk(columnarMap.getValuesBlock(), defLevelIterables, repLevelIterables));
}
@Override
public void close()
{
keyWriter.close();
valueWriter.close();
}
@Override
public List getBuffer()
throws IOException
{
return ImmutableList.builder().addAll(keyWriter.getBuffer()).addAll(valueWriter.getBuffer()).build();
}
@Override
public long getBufferedBytes()
{
return keyWriter.getBufferedBytes() + valueWriter.getBufferedBytes();
}
@Override
public long getRetainedBytes()
{
return INSTANCE_SIZE + keyWriter.getRetainedBytes() + valueWriter.getRetainedBytes();
}
@Override
public void reset()
{
keyWriter.reset();
valueWriter.reset();
}
}
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