org.apache.druid.query.movingaverage.averagers.ConstantAverager Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
* "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 org.apache.druid.query.movingaverage.averagers;
import org.apache.druid.query.aggregation.AggregatorFactory;
import java.util.Map;
/**
* The constant averager.Created soley for incremental development and wiring things up.
*/
public class ConstantAverager implements Averager
{
private String name;
private float retval;
/**
* @param n
* @param name
* @param retval
*/
public ConstantAverager(int n, String name, float retval)
{
this.name = name;
this.retval = retval;
}
/* (non-Javadoc)
* @see Averager#getResult()
*/
@Override
public Float getResult()
{
return retval;
}
/* (non-Javadoc)
* @see Averager#getName()
*/
@Override
public String getName()
{
return name;
}
/* (non-Javadoc)
* @see Averager#addElement(java.util.Map, java.util.Map)
*/
@Override
public void addElement(Map e, Map a)
{
// since we return a constant, no need to read from the event
}
/* (non-Javadoc)
* @see Averager#skip()
*/
@Override
public void skip()
{
}
}