org.tribuo.data.columnar.extractors

Class DoubleExtractor

java.lang.Object

org.tribuo.data.columnar.extractors.SimpleFieldExtractor<Double>

org.tribuo.data.columnar.extractors.DoubleExtractor

All Implemented Interfaces:

com.oracle.labs.mlrg.olcut.config.Configurable, com.oracle.labs.mlrg.olcut.provenance.Provenancable<com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance>, FieldExtractor<Double>

public class DoubleExtractor
extends SimpleFieldExtractor<Double>

Extracts the field value and converts it to a double.

Returns an empty optional if the value failed to parse.

Field Summary

Fields inherited from class org.tribuo.data.columnar.extractors.SimpleFieldExtractor

fieldName, metadataName

Constructor Summary

Constructors

Constructor and Description
DoubleExtractor(String fieldName) Extracts a double value from the supplied field name.
DoubleExtractor(String fieldName, String metadataName) Extracts a double value from the supplied field name.

Method Summary

Modifier and Type	Method and Description
protected Optional<Double>	extractField(String value) Extracts the field value, or returns Optional.empty() if it failed to parse.
com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance	getProvenance()
Class<Double>	getValueType() Gets the class of the value produced by this extractor.

Methods inherited from class org.tribuo.data.columnar.extractors.SimpleFieldExtractor

extract, getFieldName, getMetadataName, postConfig, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleExtractor

public DoubleExtractor(String fieldName)

Extracts a double value from the supplied field name. Writes the metadata out using the field name as the key.

Parameters:

fieldName - The field name to inspect.

DoubleExtractor

public DoubleExtractor(String fieldName,
                       String metadataName)

Extracts a double value from the supplied field name. Writes the metadata out using the metadataName as the key.

Parameters:

fieldName - The field name to inspect.

metadataName - The metadata name to emit.

Method Detail

getValueType

public Class<Double> getValueType()

Description copied from interface: FieldExtractor

Gets the class of the value produced by this extractor.

Returns:

The class of the value.

extractField

protected Optional<Double> extractField(String value)

Description copied from class: SimpleFieldExtractor

Extracts the field value, or returns Optional.empty() if it failed to parse.

Specified by:

extractField in class SimpleFieldExtractor<Double>

Parameters:

value - The field value to read.

Returns:

The extracted value.

getProvenance

public com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance getProvenance()