org.apache.flink.api.java.summarize.aggregation

类 TupleSummaryAggregator<R extends org.apache.flink.api.java.tuple.Tuple>

java.lang.Object

org.apache.flink.api.java.summarize.aggregation.TupleSummaryAggregator<R>

所有已实现的接口:

Serializable, Aggregator<org.apache.flink.api.java.tuple.Tuple,R>

@Internal
public class TupleSummaryAggregator<R extends org.apache.flink.api.java.tuple.Tuple>
extends Object
implements Aggregator<org.apache.flink.api.java.tuple.Tuple,R>

Aggregate tuples using an array of aggregators, one for each "column" or position within the Tuple.

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
TupleSummaryAggregator(Aggregator[] columnAggregators)

方法概要

限定符和类型	方法和说明
void	aggregate(org.apache.flink.api.java.tuple.Tuple value) Add a value to the current aggregation.
void	combine(Aggregator<org.apache.flink.api.java.tuple.Tuple,R> other) Combine two aggregations of the same type.
R	result() Provide the final result of the aggregation.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

TupleSummaryAggregator

public TupleSummaryAggregator(Aggregator[] columnAggregators)

方法详细资料

aggregate

public void aggregate(org.apache.flink.api.java.tuple.Tuple value)

从接口复制的说明: Aggregator

Add a value to the current aggregation.

指定者:

aggregate 在接口中 Aggregator<org.apache.flink.api.java.tuple.Tuple,R extends org.apache.flink.api.java.tuple.Tuple>

combine

public void combine(Aggregator<org.apache.flink.api.java.tuple.Tuple,R> other)

从接口复制的说明: Aggregator

Combine two aggregations of the same type.

(Implementations will need to do an unchecked cast).

指定者:

combine 在接口中 Aggregator<org.apache.flink.api.java.tuple.Tuple,R extends org.apache.flink.api.java.tuple.Tuple>

result

public R result()

从接口复制的说明: Aggregator

Provide the final result of the aggregation.

指定者:

result 在接口中 Aggregator<org.apache.flink.api.java.tuple.Tuple,R extends org.apache.flink.api.java.tuple.Tuple>