Package org.apache.beam.sdk.transforms

Class Regex.FindAll

java.lang.Object
org.apache.beam.sdk.transforms.PTransform<PCollection<String>,PCollection<List<String>>>
org.apache.beam.sdk.transforms.Regex.FindAll
All Implemented Interfaces:
Serializable, HasDisplayData
Enclosing class:
Regex
public static class Regex.FindAll extends PTransform<PCollection<String>,PCollection<List<String>>>
Regex.Find<String> takes a PCollection<String> and returns a PCollection<List<String>> representing the value extracted from the Regex groups of the input PCollection to the number of times that element occurs in the input.

This transform runs a Regex on the entire input line. If a portion of the line does not match the Regex, the line will not be output. If it does match a portion of the line, the groups in the Regex will be used. The output will be the Regex groups.

Example of use: 


 PCollection<String> words = ...;
 PCollection<List<String>> values =
     words.apply(Regex.findAll("myregex (mygroup)"));
See Also:

  • Constructor Details

    • FindAll

      public FindAll(Pattern pattern)

  • Method Details

    • expand

      public PCollection<List<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<List<String>>>