io.druid.query.groupby.epinephelinae.column.LongGroupByColumnSelectorStrategy Maven / Gradle / Ivy
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* Licensed to Metamarkets Group Inc. (Metamarkets) under one
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* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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
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*/
package io.druid.query.groupby.epinephelinae.column;
import com.google.common.primitives.Longs;
import io.druid.segment.ColumnValueSelector;
import java.nio.ByteBuffer;
import java.util.Map;
public class LongGroupByColumnSelectorStrategy implements GroupByColumnSelectorStrategy
{
@Override
public int getGroupingKeySize()
{
return Longs.BYTES;
}
@Override
public void processValueFromGroupingKey(
GroupByColumnSelectorPlus selectorPlus, ByteBuffer key, Map resultMap
)
{
final long val = key.getLong(selectorPlus.getKeyBufferPosition());
resultMap.put(selectorPlus.getOutputName(), val);
}
@Override
public void initColumnValues(ColumnValueSelector selector, int columnIndex, Object[] valuess)
{
valuess[columnIndex] = selector.getLong();
}
@Override
public Object getOnlyValue(ColumnValueSelector selector)
{
return selector.getLong();
}
@Override
public void writeToKeyBuffer(int keyBufferPosition, Object obj, ByteBuffer keyBuffer)
{
keyBuffer.putLong(keyBufferPosition, (Long) obj);
}
@Override
public void initGroupingKeyColumnValue(
int keyBufferPosition, int columnIndex, Object rowObj, ByteBuffer keyBuffer, int[] stack
)
{
keyBuffer.putLong(keyBufferPosition, (Long) rowObj);
stack[columnIndex] = 1;
}
@Override
public boolean checkRowIndexAndAddValueToGroupingKey(
int keyBufferPosition, Object rowObj, int rowValIdx, ByteBuffer keyBuffer
)
{
// rows from a long column always have a single value, multi-value is not currently supported
// this method handles row values after the first in a multivalued row, so just return false
return false;
}
}