org.grouplens.lenskit.data.text

Class Fields

java.lang.Object

org.grouplens.lenskit.data.text.Fields

public final class Fields
extends Object

Method Summary

Modifier and Type	Method and Description
static Field	ignored() A field that is ignored.
static Field	ignored(boolean optional) A field that is ignored and may be optional.
static Field	item() The item ID field.
static Field	likeCount() A plus count field.
static List<Field>	list(Field... fields) Create a list of fields.
static Field	rating() The rating field.
static Field	timestamp() A required timestamp field.
static Field	timestamp(boolean required) A timestamp field.
static Field	user() The user ID field.

Methods inherited from class java.lang.Object

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

Method Detail

user

public static Field user()

The user ID field.

Returns:

A field definition for the user ID.

item

public static Field item()

The item ID field.

Returns:

A field definition for the item ID.

timestamp

public static Field timestamp()

A required timestamp field.

Returns:

A field definition for a required timestamp field.

rating

public static Field rating()

The rating field.

Returns:

A field definition for a rating field.

ignored

public static Field ignored()

A field that is ignored.

Returns:

A field definition for a field to ignore.

ignored

public static Field ignored(boolean optional)

A field that is ignored and may be optional.

Parameters:

optional - true if the field is optional (it may or may not appear).

Returns:

A field definition for a field to ignore.

list

public static List<Field> list(Field... fields)

Create a list of fields. This helper is structured to aid in type inference.

Parameters:

fields - The fields to put in the list.

Returns:

The field list.

timestamp

public static Field timestamp(boolean required)

A timestamp field.

Parameters:

required - true if the timestamp is required, false if it is optional.

Returns:

A field definition for a required timestamp field.

likeCount

public static Field likeCount()

A plus count field.

Returns:

A field definition for a required plus count field.