org.eclipse.rdf4j.federated.write

Class ReadOnlyWriteStrategy

java.lang.Object

org.eclipse.rdf4j.federated.write.ReadOnlyWriteStrategy

All Implemented Interfaces:

WriteStrategy

public class ReadOnlyWriteStrategy
extends Object
implements WriteStrategy

Default WriteStrategy implementation for read only federations. In case a user attempts to perform a write operation a UnsupportedOperationException is thrown.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
static ReadOnlyWriteStrategy	INSTANCE

Method Summary

Modifier and Type	Method and Description
void	addStatement(Resource subj, IRI pred, Value obj, Resource... contexts) Add a statement
void	begin() Begin a transaction.
void	close() Close this write strategy (e.g.
void	commit() Commit a transaction.
void	initialize() Initialize the write strategy (e.g.
boolean	isInitialized() Returns true if this instance is initialized
void	removeStatement(Resource subj, IRI pred, Value obj, Resource... contexts) Remove a statement
void	rollback() Rollback a transaction.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ReadOnlyWriteStrategy INSTANCE

Method Detail

begin

public void begin()
           throws RepositoryException

Description copied from interface: WriteStrategy

Begin a transaction.

Specified by:

begin in interface WriteStrategy

Throws:

RepositoryException

commit

public void commit()
            throws RepositoryException

Description copied from interface: WriteStrategy

Commit a transaction.

Specified by:

commit in interface WriteStrategy

Throws:

RepositoryException

rollback

public void rollback()
              throws RepositoryException

Description copied from interface: WriteStrategy

Rollback a transaction.

Specified by:

rollback in interface WriteStrategy

Throws:

RepositoryException

addStatement

public void addStatement(Resource subj,
                         IRI pred,
                         Value obj,
                         Resource... contexts)

Description copied from interface: WriteStrategy

Add a statement

Specified by:

addStatement in interface WriteStrategy

removeStatement

public void removeStatement(Resource subj,
                            IRI pred,
                            Value obj,
                            Resource... contexts)
                     throws RepositoryException

Description copied from interface: WriteStrategy

Remove a statement

Specified by:

removeStatement in interface WriteStrategy

Throws:

RepositoryException

initialize

public void initialize()
                throws RepositoryException

Description copied from interface: WriteStrategy

Initialize the write strategy (e.g. open a shared RepositoryConnection.

Specified by:

initialize in interface WriteStrategy

Throws:

RepositoryException

close

public void close()
           throws RepositoryException

Description copied from interface: WriteStrategy

Close this write strategy (e.g. close a shared RepositoryException).

Specified by:

close in interface WriteStrategy

Throws:

RepositoryException

isInitialized

public boolean isInitialized()

Description copied from interface: WriteStrategy

Returns true if this instance is initialized

Specified by:

isInitialized in interface WriteStrategy

Returns:

flag indicating the initialization resources