Package org.apache.beam.sdk.transforms

Class Regex.Split

java.lang.Object
org.apache.beam.sdk.transforms.PTransform<PCollection<String>,PCollection<String>>
org.apache.beam.sdk.transforms.Regex.Split
All Implemented Interfaces:
Serializable, HasDisplayData
Enclosing class:
Regex
public static class Regex.Split extends PTransform<PCollection<String>,PCollection<String>>
Regex.Split<String> takes a PCollection<String> and returns a PCollection<String> with the input string split into individual items in a list. Each item is then output as a separate string.

This transform runs a Regex as part of a splint the entire input line. The split gives back an array of items. Each item is output as a separate item in the PCollection<String>.

Depending on the Regex, a split can be an empty or "" string. You can pass in a parameter if you want empty strings or not.

Example of use: 


 PCollection<String> words = ...;
 PCollection<String> values =
     words.apply(Regex.split("\W*"));
See Also:

  • Constructor Details

    • Split

      public Split(Pattern pattern, boolean outputEmpty)

  • Method Details

    • expand

      public PCollection<String> expand(PCollection<String> in)
      Description copied from class: PTransform
      Override this method to specify how this PTransform should be expanded on the given InputT.

      NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

      Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

      Specified by:
      expand in class PTransform<PCollection<String>,PCollection<String>>