|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectnet.sf.jagg.Aggregator
net.sf.jagg.AvgAggregator
public class AvgAggregator
This class represents the "avg" aggregator over numeric values.
Field Summary |
---|
Fields inherited from class net.sf.jagg.Aggregator |
---|
PROP_SELF |
Constructor Summary | |
---|---|
AvgAggregator(java.lang.String property)
Constructs an AvgAggregator that operates on the specified
property. |
Method Summary | |
---|---|
void |
init()
Initialize the sum and count to zero. |
void |
iterate(java.lang.Object value)
If not null, add the property to the sum and count it. |
void |
merge(Aggregator agg)
Merge the given Aggregator into this one by adding counts
and sums. |
AvgAggregator |
replicate()
Returns an uninitialized copy of this Aggregator object,
with the same property(ies) to analyze. |
java.lang.Double |
terminate()
Return the average by dividing the sum by the count. |
DoubleDouble |
terminateDoubleDouble()
Return the result as a DoubleDouble . |
Methods inherited from class net.sf.jagg.Aggregator |
---|
equals, getAggregator, getAggregator, getProperty, getValueFromProperty, hashCode, isInUse, setInUse, setProperty, toString |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public AvgAggregator(java.lang.String property)
AvgAggregator
that operates on the specified
property.
property
- Average this property's values.Method Detail |
---|
public AvgAggregator replicate()
Aggregator
object,
with the same property(ies) to analyze.
replicate
in class Aggregator
Aggregator
object.public void init()
init
in class Aggregator
public void iterate(java.lang.Object value)
iterate
in class Aggregator
value
- The value to aggregate.Aggregator.getValueFromProperty(java.lang.Object, java.lang.String)
public void merge(Aggregator agg)
Aggregator
into this one by adding counts
and sums.
merge
in class Aggregator
agg
- The Aggregator
to merge into this one.public java.lang.Double terminate()
terminate
in class Aggregator
Double
, or NaN
if no
values have been accumulated.public DoubleDouble terminateDoubleDouble()
DoubleDouble
. This is used mainly
when other Aggregators
that use this result must maintain a
high precision.
terminateDoubleDouble
in class Aggregator
Double
, or NaN
if no
values have been accumulated.DoubleDouble
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |