org.apache.beam.examples.cookbook

Class CombinePerKeyExamples.ConcatWords

java.lang.Object

org.apache.beam.examples.cookbook.CombinePerKeyExamples.ConcatWords

All Implemented Interfaces:

java.io.Serializable, org.apache.beam.sdk.transforms.ProcessFunction<java.lang.Iterable<java.lang.String>,java.lang.String>, org.apache.beam.sdk.transforms.SerializableFunction<java.lang.Iterable<java.lang.String>,java.lang.String>

Enclosing class:

CombinePerKeyExamples

public static class CombinePerKeyExamples.ConcatWords
extends java.lang.Object
implements org.apache.beam.sdk.transforms.SerializableFunction<java.lang.Iterable<java.lang.String>,java.lang.String>

A 'combine function' used with the Combine.perKey transform. Builds a comma-separated string of all input items. So, it will build a string containing all the different Shakespeare plays in which the given input word has appeared.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConcatWords()

Method Summary

Modifier and Type	Method and Description
java.lang.String	apply(java.lang.Iterable<java.lang.String> input)

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcatWords

public ConcatWords()

Method Detail

apply

public java.lang.String apply(java.lang.Iterable<java.lang.String> input)

Specified by:

apply in interface org.apache.beam.sdk.transforms.ProcessFunction<java.lang.Iterable<java.lang.String>,java.lang.String>

Specified by:

apply in interface org.apache.beam.sdk.transforms.SerializableFunction<java.lang.Iterable<java.lang.String>,java.lang.String>