org.grouplens.lenskit.data.source

Class TextDataSource

java.lang.Object

org.grouplens.lenskit.data.source.AbstractDataSource

org.grouplens.lenskit.data.source.TextDataSource

All Implemented Interfaces:

DataSource

public class TextDataSource
extends AbstractDataSource

Data source backed by a CSV file. Use CSVDataSourceBuilder to configure and build one of these, or the csvfile command in an eval script.

Since:

2.2

See Also:

CSVDataSourceBuilder

Field Summary

Fields inherited from class org.grouplens.lenskit.data.source.AbstractDataSource

logger

Method Summary

Modifier and Type	Method and Description
EventDAO	getEventDAO() Get an event DAO for this data source.
File	getFile()
EventFormat	getFormat()
ItemDAO	getItemDAO() Default item DAO implementation.
ItemNameDAO	getItemNameDAO() Get the item name DAO.
String	getName() Get the data source name.
PreferenceDomain	getPreferenceDomain() Get the preference domain of this data source.
long	lastModified()
String	toString()

Methods inherited from class org.grouplens.lenskit.data.source.AbstractDataSource

configure, getItemEventDAO, getUserDAO, getUserEventDAO

Methods inherited from class java.lang.Object

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

Method Detail

getName

public String getName()

Description copied from interface: DataSource

Get the data source name.

Returns:

The data sources's name.

getFile

public File getFile()

getFormat

public EventFormat getFormat()

getPreferenceDomain

public PreferenceDomain getPreferenceDomain()

Description copied from interface: DataSource

Get the preference domain of this data source.

Returns:

The data source preference domain.

lastModified

public long lastModified()

getEventDAO

public EventDAO getEventDAO()

Description copied from interface: DataSource

Get an event DAO for this data source.

Returns:

A DAO factory backed by this data source.

getItemDAO

public ItemDAO getItemDAO()

Description copied from class: AbstractDataSource

Default item DAO implementation. If the event DAO implements ItemDAO, it is returned directly; otherwise, a new PrefetchingItemDAO is created.

Specified by:

getItemDAO in interface DataSource

Overrides:

getItemDAO in class AbstractDataSource

Returns:

The user-event DAO.

getItemNameDAO

public ItemNameDAO getItemNameDAO()

Description copied from class: AbstractDataSource

Get the item name DAO. The default implementation first checks if the event DAO implements this interface, then the item DAO.

Specified by:

getItemNameDAO in interface DataSource

Overrides:

getItemNameDAO in class AbstractDataSource

Returns:

The item name DAO, or null if none is defined.

toString

public String toString()

Overrides:

toString in class Object