org.dftproject.genesis.core.data
Class DataManager

java.lang.Object
  org.dftproject.genesis.core.data.DataManager

public class DataManager
extends java.lang.Object

The DataManager class controls the data.

Field Summary

static java.lang.String

DATA_STORE The name of the default data store.

Method Summary

void	addDataListener(IDataListener listener) Add a data listener
void	close() Closes the database.
protected java.sql.Connection	getConnection() Returns a JDBC connection to the database.
DataConnection	getDataConnection() Returns a data connection to the database.
DataConnection	getDataConnection(java.sql.Connection conn) Returns a data connection wrapped around the given JDBC connection
static DataManager	getDefault() Returns the singleton DataManager instance.
DataView	getView() Returns the primary data view.
void	notifyDeleteListeners(DataResourceNode graph, DataResourceNode subject, DataResourceNode predicate, INode object) Notifies data listeners of a deletion.
void	notifyInsertListeners(DataResourceNode graph, DataResourceNode subject, DataResourceNode predicate, INode object) Notifies data listeners of an insertion.
void	removeDataListener(IDataListener listener) Remove a data listener.
java.lang.String	usePrefix(java.lang.String uri) Returns the given URI using a namespace prefix if available.

Methods inherited from class java.lang.Object

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

Field Detail

DATA_STORE

public static final java.lang.String DATA_STORE

The name of the default data store.

See Also:

Constant Field Values

Method Detail

getDefault

public static DataManager getDefault()

Returns the singleton DataManager instance.

Returns:

the singleton instance

getView

public DataView getView()

Returns the primary data view.

Returns:

the primary data view

close

public void close()

Closes the database.

usePrefix

public java.lang.String usePrefix(java.lang.String uri)

Returns the given URI using a namespace prefix if available.

Parameters:

uri - the URI

Returns:

the prefixed URI, or the original URI if no prefix is available

getConnection

protected java.sql.Connection getConnection()

Returns a JDBC connection to the database.

Returns:

a JDBC connection, or null on failure

getDataConnection

public DataConnection getDataConnection()

Returns a data connection to the database.

Returns:

a data connection, or null on failure

getDataConnection

public DataConnection getDataConnection(java.sql.Connection conn)

Returns a data connection wrapped around the given JDBC connection

Parameters:

conn - a JDBC connection

Returns:

a data connection

addDataListener

public void addDataListener(IDataListener listener)

Add a data listener

Parameters:

listener - the listener

removeDataListener

public void removeDataListener(IDataListener listener)

Remove a data listener.

Parameters:

listener - the listener

notifyInsertListeners

public void notifyInsertListeners(DataResourceNode graph,
                                  DataResourceNode subject,
                                  DataResourceNode predicate,
                                  INode object)

Notifies data listeners of an insertion.

Parameters:

graph - the graph

subject - the subject

predicate - the predicate

object - the object

notifyDeleteListeners

public void notifyDeleteListeners(DataResourceNode graph,
                                  DataResourceNode subject,
                                  DataResourceNode predicate,
                                  INode object)

Notifies data listeners of a deletion.

Parameters:

graph - the graph

subject - the subject

predicate - the predicate

object - the object