org.apache.flink.api.java.record.operators

Class ReduceOperator.Builder

java.lang.Object

org.apache.flink.api.java.record.operators.ReduceOperator.Builder

Enclosing class:

ReduceOperator

public static class ReduceOperator.Builder
extends Object

Builder pattern, straight from Joshua Bloch's Effective Java (2nd Edition).

Method Summary

Modifier and Type	Method and Description
ReduceOperator	build() Creates and returns a ReduceOperator from using the values given to the builder.
ReduceOperator.Builder	input(org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>... inputs) Sets one or several inputs (union).
ReduceOperator.Builder	input(org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record> input) Sets the input.
ReduceOperator.Builder	inputs(List<org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>> inputs) Sets the inputs.
ReduceOperator.Builder	keyField(Class<? extends org.apache.flink.types.Key<?>> keyClass, int keyColumn) Adds additional key field.
ReduceOperator.Builder	name(String name) Sets the name of this operator.
ReduceOperator.Builder	secondaryOrder(org.apache.flink.api.common.operators.Ordering order) Sets the order of the elements within a group.
ReduceOperator.Builder	setBroadcastVariable(String name, org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record> input) Binds the result produced by a plan rooted at root to a variable used by the UDF wrapped in this operator.
ReduceOperator.Builder	setBroadcastVariables(Map<String,org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>> inputs) Binds multiple broadcast variables.

Methods inherited from class java.lang.Object

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

Method Detail

keyField

public ReduceOperator.Builder keyField(Class<? extends org.apache.flink.types.Key<?>> keyClass,
                                       int keyColumn)

Adds additional key field.

Parameters:

keyClass - The class of the key data type.

keyColumn - The position of the key.

secondaryOrder

public ReduceOperator.Builder secondaryOrder(org.apache.flink.api.common.operators.Ordering order)

Sets the order of the elements within a group.

Parameters:

order - The order for the elements in a group.

input

public ReduceOperator.Builder input(org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record> input)

Sets the input.

Parameters:

input - The input.

input

public ReduceOperator.Builder input(org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>... inputs)

Sets one or several inputs (union).

Parameters:

inputs -

inputs

public ReduceOperator.Builder inputs(List<org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>> inputs)

Sets the inputs.

Parameters:

inputs -

setBroadcastVariable

public ReduceOperator.Builder setBroadcastVariable(String name,
                                                   org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record> input)

Binds the result produced by a plan rooted at root to a variable used by the UDF wrapped in this operator.

setBroadcastVariables

public ReduceOperator.Builder setBroadcastVariables(Map<String,org.apache.flink.api.common.operators.Operator<org.apache.flink.types.Record>> inputs)

Binds multiple broadcast variables.

name

public ReduceOperator.Builder name(String name)

Sets the name of this operator.

Parameters:

name -

build

public ReduceOperator build()

Creates and returns a ReduceOperator from using the values given to the builder.

Returns:

The created operator