Package org.apache.beam.sdk.transforms

Class Regex.Split

  • All Implemented Interfaces:
    java.io.Serializable, HasDisplayData
    Enclosing class:
    Regex
    public static class Regex.Split
extends PTransform<PCollection<java.lang.String>,​PCollection<java.lang.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:
    Serialized Form

    • Constructor Detail

      • Split

        public Split​(java.util.regex.Pattern pattern,
             boolean outputEmpty)

    • Method Detail

      • expand

        public PCollection<java.lang.String> expand​(PCollection<java.lang.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<java.lang.String>,​PCollection<java.lang.String>>