org.grouplens.lenskit.data.source

Class AbstractDataSource

java.lang.Object

org.grouplens.lenskit.data.source.AbstractDataSource

All Implemented Interfaces:

DataSource

Direct Known Subclasses:

GenericDataSource, TextDataSource

public abstract class AbstractDataSource
extends Object
implements DataSource

Base class to help implement data sources. This class automatically wraps the event DAO in a prefetching DAO to produce the specialized DAO classes, if it does not already implement those classes. It also produces a LensKit configuration with the appropriate bindings for the configured data source.

Since:

2.2

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor and Description
AbstractDataSource()

Method Summary

Modifier and Type	Method and Description
void	configure(LenskitConfiguration config) Configure LensKit to use this data set.
ItemDAO	getItemDAO() Default item DAO implementation.
ItemEventDAO	getItemEventDAO() Default item-event DAO implementation.
ItemNameDAO	getItemNameDAO() Get the item name DAO.
UserDAO	getUserDAO() Default user DAO implementation.
UserEventDAO	getUserEventDAO() Default user-event DAO implementation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.grouplens.lenskit.data.source.DataSource

getEventDAO, getName, getPreferenceDomain, lastModified

Field Detail

logger

protected final org.slf4j.Logger logger

Constructor Detail

AbstractDataSource

public AbstractDataSource()

Method Detail

getUserEventDAO

public UserEventDAO getUserEventDAO()

Default user-event DAO implementation. If the event DAO implements UserEventDAO, it is returned directly; otherwise, a new PrefetchingUserEventDAO is created.

Specified by:

getUserEventDAO in interface DataSource

Returns:

The user-event DAO.

getItemEventDAO

public ItemEventDAO getItemEventDAO()

Default item-event DAO implementation. If the event DAO implements ItemEventDAO, it is returned directly; otherwise, a new PrefetchingItemEventDAO is created.

Specified by:

getItemEventDAO in interface DataSource

Returns:

The item-event DAO.

getItemDAO

public ItemDAO getItemDAO()

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

Returns:

The user-event DAO.

getUserDAO

public UserDAO getUserDAO()

Default user DAO implementation. If the event DAO implements UserDAO, it is returned directly; otherwise, a new PrefetchingUserDAO is created.

Specified by:

getUserDAO in interface DataSource

Returns:

The user-event DAO.

getItemNameDAO

public ItemNameDAO getItemNameDAO()

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

Returns:

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

configure

public void configure(LenskitConfiguration config)

Description copied from interface: DataSource

Configure LensKit to use this data set.

Specified by:

configure in interface DataSource

Parameters:

config - A LensKit configuration. Bindings for this data source's data will be added to this configuration.