public class ExtremumOperator<T extends java.lang.Comparable<T>> extends java.lang.Object implements IMultisetAggregationOperator<T,java.util.SortedMap<T,java.lang.Integer>,T>
Modifier and Type | Class and Description |
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static class |
ExtremumOperator.Extreme |
Modifier and Type | Method and Description |
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T |
aggregateStream(java.util.stream.Stream<T> stream)
Calculates the aggregate results from a given stream of values; all values are considered as inserted
|
java.util.SortedMap<T,java.lang.Integer> |
createNeutral() |
T |
getAggregate(java.util.SortedMap<T,java.lang.Integer> result) |
static <T extends java.lang.Comparable<T>> |
getMax() |
static <T extends java.lang.Comparable<T>> |
getMin() |
java.lang.String |
getName()
A name or identifier of the operator.
|
java.lang.String |
getShortDescription()
A textual description of the operator.
|
boolean |
isNeutral(java.util.SortedMap<T,java.lang.Integer> result) |
java.util.SortedMap<T,java.lang.Integer> |
update(java.util.SortedMap<T,java.lang.Integer> oldResult,
T updateValue,
boolean isInsertion) |
public static <T extends java.lang.Comparable<T>> ExtremumOperator<T> getMin()
public static <T extends java.lang.Comparable<T>> ExtremumOperator<T> getMax()
public java.lang.String getShortDescription()
IMultisetAggregationOperator
getShortDescription
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>
public java.lang.String getName()
IMultisetAggregationOperator
public java.util.SortedMap<T,java.lang.Integer> createNeutral()
createNeutral
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>
public boolean isNeutral(java.util.SortedMap<T,java.lang.Integer> result)
isNeutral
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>
public java.util.SortedMap<T,java.lang.Integer> update(java.util.SortedMap<T,java.lang.Integer> oldResult, T updateValue, boolean isInsertion)
update
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>
public T getAggregate(java.util.SortedMap<T,java.lang.Integer> result)
getAggregate
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>
public T aggregateStream(java.util.stream.Stream<T> stream)
IMultisetAggregationOperator
aggregateStream
in interface IMultisetAggregationOperator<T extends java.lang.Comparable<T>,java.util.SortedMap<T extends java.lang.Comparable<T>,java.lang.Integer>,T extends java.lang.Comparable<T>>