org.grouplens.lenskit.data.text

Interface Field

public interface Field

Identifiers for fields in a delimited/columnar database.

Since:

2.2

Method Summary

Modifier and Type	Method and Description
void	apply(String token, EventBuilder builder) Apply the field's value to the builder.
Set<Class<? extends EventBuilder>>	getExpectedBuilderTypes() Get the set of event builder types that this field can apply to.
boolean	isOptional() Query whether this field is optional.

Method Detail

isOptional

boolean isOptional()

Query whether this field is optional.

Returns:

true if the field is optional.

apply

void apply(String token,
           EventBuilder builder)

Apply the field's value to the builder.

Parameters:

token - The field value (or null if this is a nonexistent optional field).

builder - The builder into which to set the value.

getExpectedBuilderTypes

Set<Class<? extends EventBuilder>> getExpectedBuilderTypes()

Get the set of event builder types that this field can apply to.

Returns:

A set of classes representing event builder types to which this field can apply.”