org.datavec.api.records.reader.impl.jackson

Class FieldSelection

java.lang.Object

org.datavec.api.records.reader.impl.jackson.FieldSelection

public class FieldSelection
extends java.lang.Object

FieldSelection is used in conjunction with the JacksonRecordReader (and the subclasses). The are a few motivations here:
- Formats such as XML, JSON and YAML can contain arbitrarily nested components, and we need to flatten them somehow
- These formats can vary in terms of order (for example, JSON is unordered), so we need to define the exact order of outputs for the record reader
- In any given JSON/XML/YAML file, there might not be a particular value present (but: we still want it to be represented in the output)
- In any given JSON/XML/YAML file, we might want to totally ignore certain fields

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FieldSelection.Builder

Field Summary

Fields

Modifier and Type	Field and Description
static Writable	DEFAULT_MISSING_VALUE

Method Summary

Modifier and Type	Method and Description
java.util.List<java.lang.String[]>	getFieldPaths()
int	getNumFields()
java.util.List<Writable>	getValueIfMissing()

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MISSING_VALUE

public static final Writable DEFAULT_MISSING_VALUE

Method Detail

getFieldPaths

public java.util.List<java.lang.String[]> getFieldPaths()

getValueIfMissing

public java.util.List<Writable> getValueIfMissing()

getNumFields

public int getNumFields()