/*
* Druid - a distributed column store.
* Copyright (C) 2012, 2013 Metamarkets Group Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package io.druid.segment.serde;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import io.druid.segment.column.ColumnBuilder;
import io.druid.segment.column.ColumnConfig;
import io.druid.segment.column.ValueType;
import io.druid.segment.data.CompressedLongsIndexedSupplier;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.WritableByteChannel;
/**
*/
public class LongGenericColumnPartSerde implements ColumnPartSerde
{
@JsonCreator
public static LongGenericColumnPartSerde createDeserializer(
@JsonProperty("byteOrder") ByteOrder byteOrder
)
{
return new LongGenericColumnPartSerde(null, byteOrder);
}
private final CompressedLongsIndexedSupplier compressedLongs;
private final ByteOrder byteOrder;
public LongGenericColumnPartSerde(CompressedLongsIndexedSupplier compressedLongs, ByteOrder byteOrder)
{
this.compressedLongs = compressedLongs;
this.byteOrder = byteOrder;
}
@JsonProperty
public ByteOrder getByteOrder()
{
return byteOrder;
}
@Override
public long numBytes()
{
return compressedLongs.getSerializedSize();
}
@Override
public void write(WritableByteChannel channel) throws IOException
{
compressedLongs.writeToChannel(channel);
}
@Override
public ColumnPartSerde read(ByteBuffer buffer, ColumnBuilder builder, ColumnConfig columnConfig)
{
final CompressedLongsIndexedSupplier column = CompressedLongsIndexedSupplier.fromByteBuffer(buffer, byteOrder);
builder.setType(ValueType.LONG)
.setHasMultipleValues(false)
.setGenericColumn(new LongGenericColumnSupplier(column));
return new LongGenericColumnPartSerde(column, byteOrder);
}
}