Package org.apache.beam.sdk.io.csv

Class CsvIOParse<T>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<java.lang.String>,CsvIOParseResult<T>>

org.apache.beam.sdk.io.csv.CsvIOParse<T>

All Implemented Interfaces:

java.io.Serializable, org.apache.beam.sdk.transforms.display.HasDisplayData

public abstract class CsvIOParse<T>
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<java.lang.String>,CsvIOParseResult<T>>

PTransform for Parsing CSV Record Strings into Schema-mapped target types. CsvIOParse is not instantiated directly but via CsvIO.parse(java.lang.Class<T>, org.apache.commons.csv.CSVFormat) or CsvIO.parseRows(org.apache.beam.sdk.schemas.Schema, org.apache.commons.csv.CSVFormat).

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor	Description
CsvIOParse()

Method Summary

Modifier and Type	Method	Description
CsvIOParseResult<T>	expand(org.apache.beam.sdk.values.PCollection<java.lang.String> input)
<OutputT extends @NonNull java.lang.Object> CsvIOParse<T>	withCustomRecordParsing(java.lang.String fieldName, org.apache.beam.sdk.transforms.SerializableFunction<java.lang.String,OutputT> customRecordParsingFn)	Configures custom cell parsing.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

CsvIOParse

public CsvIOParse()

Method Detail

withCustomRecordParsing

public <OutputT extends @NonNull java.lang.Object> CsvIOParse<T> withCustomRecordParsing(java.lang.String fieldName,
                                                                                         org.apache.beam.sdk.transforms.SerializableFunction<java.lang.String,OutputT> customRecordParsingFn)

Configures custom cell parsing.

Example

 CsvIO.parse().withCustomRecordParsing("listOfInts", cell-> {

  List<Integer> result = new ArrayList<>();
  for (String stringValue: Splitter.on(";").split(cell)) {
    result.add(Integer.parseInt(stringValue));
  }

 });
 

expand

public CsvIOParseResult<T> expand(org.apache.beam.sdk.values.PCollection<java.lang.String> input)

Specified by:

expand in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<java.lang.String>,CsvIOParseResult<T>>