/**
* <p>Adds static source (<b>SDEF</b>). Static sources are the result of a consolidation function applied
* to *any* other source that has been defined previously.</p>
*
* @param name source name.
* @param defName Name of the datasource to calculate the value from.
* @param consolFun Consolidation function to use for value calculation
*/
public void addDatasource(String name, String defName, AggregateFunction.Type aggregateFunction)
{
sources.Add(new DatatSDef(name, defName, aggregateFunction));
}
public long getTimeStamp(AggregateFunction.Type aggregateFunction)
{
switch (aggregateFunction)
{
case AggregateFunction.Type.AVERAGE:
return LastTimeStamp;
case AggregateFunction.Type.FIRST:
return FirstTimeStamp;
case AggregateFunction.Type.LAST:
return LastTimeStamp;
case AggregateFunction.Type.MAX:
return MaxTimeStamp;
case AggregateFunction.Type.MIN:
return MinTimeStamp;
case AggregateFunction.Type.TOTAL:
return LastTimeStamp;
}
throw new ArgumentException("Unknown aggregate function: " + aggregateFunction);
}
/**
* Creates a new (static) virtual datasouce. The value of the datasource is constant. This value is
* evaluated by applying the given consolidation function to another virtual datasource.
*
* @param name Source name
* @param defName Other source name
* @param consolFun Consolidation function to be applied to other datasource.
*/
public void datasource(String name, String defName, AggregateFunction.Type function)
{
sources.Add(new SDef(name, defName, function));
}
/**
* Returns single aggregated value for the give consolidation function
*
* @param aggregateFunction Aggregate function: MIN, MAX, FIRST, LAST, AVERAGE, TOTAL. These constanst
* are conveniently defined in the {@link rrd4n.Common.AggregateFunction ConsolFun} interface.
*
* @return Aggregated value
*
* @throws ArgumentException Thrown if unsupported consolidation function is supplied
*/
public double getAggregate(AggregateFunction.Type aggregateFunction)
{
switch (aggregateFunction)
{
case AggregateFunction.Type.AVERAGE:
return average;
case AggregateFunction.Type.FIRST:
return first;
case AggregateFunction.Type.LAST:
return last;
case AggregateFunction.Type.MAX:
return max;
case AggregateFunction.Type.MIN:
return min;
case AggregateFunction.Type.TOTAL:
return total;
}
throw new ArgumentException("Unknown aggregate function: " + aggregateFunction);
}
public DatatSDef(String name, String defName, AggregateFunction.Type aggregateFunction)
: base(name)
{
DefName = defName;
AggregateFunction = aggregateFunction;
}
