org.apache.druid.query.movingaverage.MovingAverageHelper Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.druid.query.movingaverage;
import org.apache.druid.data.input.MapBasedRow;
import org.apache.druid.data.input.Row;
import org.apache.druid.query.dimension.DimensionSpec;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class MovingAverageHelper
{
/**
* @param dimensions A list of DimensionSpec in the specified in the query
* @param row The Row to be used for looking up dimension values
*
* @return A Map of dimension/value from the row
*/
public static Map getDimKeyFromRow(Collection dimensions, Row row)
{
Map key = new HashMap<>();
Map event = ((MapBasedRow) row).getEvent();
for (DimensionSpec dimension : dimensions) {
key.put(dimension.getOutputName(), event.get(dimension.getOutputName()));
}
return key;
}
}