org.openrdf.repository.event.base
Class InterceptingRepositoryConnectionWrapper

java.lang.Object
  org.openrdf.repository.base.RepositoryConnectionBase
      org.openrdf.repository.base.RepositoryConnectionWrapper
          org.openrdf.repository.event.base.InterceptingRepositoryConnectionWrapper

All Implemented Interfaces:

DelegatingRepositoryConnection, InterceptingRepositoryConnection, RepositoryConnection

public class InterceptingRepositoryConnectionWrapper
extends RepositoryConnectionWrapper
implements InterceptingRepositoryConnection

Wrapper that notifies interceptors of events on RepositoryConnections before they happen. Any interceptor can block the operation by returning true from the relevant notification method. To do so will also cause the notification process to stop, i.e. no other interceptors will be notified. The order in which interceptors are notified is unspecified.

Author:

Herko ter Horst

See Also:

InterceptingRepositoryWrapper

Field Summary

Fields inherited from class org.openrdf.repository.base.RepositoryConnectionBase

logger

Constructor Summary

InterceptingRepositoryConnectionWrapper(Repository repository, RepositoryConnection connection)

Method Summary

void	addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor) Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on this connection.
void	addWithoutCommit(Resource subject, URI predicate, Value object, Resource... contexts)
void	clear(Resource... contexts) Removes all statements from a specific contexts in the repository.
void	clearNamespaces() Removes all namespace declarations from the repository.
void	close() Closes the connection, freeing resources.
void	commit() Commits all updates that have been performed as part of this connection sofar.
protected boolean	isDelegatingAdd() If true then each add method will call RepositoryConnectionWrapper.addWithoutCommit(Resource, URI, Value, Resource[]).
protected boolean	isDelegatingRemove() If true then each remove method will call RepositoryConnectionWrapper.removeWithoutCommit(Resource, URI, Value, Resource[]).
void	removeNamespace(String prefix) Removes a namespace declaration by removing the association between a prefix and a namespace name.
void	removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor) Removes a registered RepositoryConnectionInterceptor from this connection.
void	removeWithoutCommit(Resource subject, URI predicate, Value object, Resource... contexts)
void	rollback() Rolls back all updates that have been performed as part of this connection sofar.
void	setAutoCommit(boolean autoCommit) Enables or disables auto-commit mode for the connection.
void	setNamespace(String prefix, String name) Sets the prefix for a namespace.

Methods inherited from class org.openrdf.repository.base.RepositoryConnectionWrapper

add, add, add, add, add, add, add, add, exportStatements, exportStatements, getContextIDs, getDelegate, getNamespace, getNamespaces, getStatements, hasStatement, hasStatement, isAutoCommit, isDelegatingRead, isEmpty, isOpen, prepareBooleanQuery, prepareGraphQuery, prepareQuery, prepareTupleQuery, remove, remove, remove, remove, setDelegate, size

Methods inherited from class org.openrdf.repository.base.RepositoryConnectionBase

addInputStreamOrReader, addWithoutCommit, autoCommit, export, finalize, getRepository, prepareBooleanQuery, prepareGraphQuery, prepareQuery, prepareTupleQuery, removeWithoutCommit

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.repository.RepositoryConnection

add, add, add, add, add, add, add, add, export, exportStatements, getContextIDs, getNamespace, getNamespaces, getRepository, getStatements, hasStatement, hasStatement, isAutoCommit, isEmpty, isOpen, prepareBooleanQuery, prepareBooleanQuery, prepareGraphQuery, prepareGraphQuery, prepareQuery, prepareQuery, prepareTupleQuery, prepareTupleQuery, remove, remove, remove, remove, size

Constructor Detail

InterceptingRepositoryConnectionWrapper

public InterceptingRepositoryConnectionWrapper(Repository repository,
                                               RepositoryConnection connection)

Method Detail

addRepositoryConnectionInterceptor

public void addRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Registers a RepositoryConnectionInterceptor that will receive notifications of operations that are performed on this connection.

Specified by:

addRepositoryConnectionInterceptor in interface InterceptingRepositoryConnection

removeRepositoryConnectionInterceptor

public void removeRepositoryConnectionInterceptor(RepositoryConnectionInterceptor interceptor)

Removes a registered RepositoryConnectionInterceptor from this connection.

Specified by:

removeRepositoryConnectionInterceptor in interface InterceptingRepositoryConnection

isDelegatingAdd

protected boolean isDelegatingAdd()

Description copied from class: RepositoryConnectionWrapper

If true then each add method will call RepositoryConnectionWrapper.addWithoutCommit(Resource, URI, Value, Resource[]).

Overrides:

isDelegatingAdd in class RepositoryConnectionWrapper

Returns:

false

isDelegatingRemove

protected boolean isDelegatingRemove()

Description copied from class: RepositoryConnectionWrapper

If true then each remove method will call RepositoryConnectionWrapper.removeWithoutCommit(Resource, URI, Value, Resource[]).

Overrides:

isDelegatingRemove in class RepositoryConnectionWrapper

Returns:

false

addWithoutCommit

public void addWithoutCommit(Resource subject,
                             URI predicate,
                             Value object,
                             Resource... contexts)
                      throws RepositoryException

Overrides:

addWithoutCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException

clear

public void clear(Resource... contexts)
           throws RepositoryException

Description copied from interface: RepositoryConnection

Removes all statements from a specific contexts in the repository.

Specified by:

clear in interface RepositoryConnection

Overrides:

clear in class RepositoryConnectionWrapper

Parameters:

contexts - The context(s) to remove the data from. Note that this parameter is a vararg and as such is optional. If no contexts are supplied the method operates on the entire repository.

Throws:

RepositoryException - If the statements could not be removed from the repository, for example because the repository is not writable.

close

public void close()
           throws RepositoryException

Description copied from interface: RepositoryConnection

Closes the connection, freeing resources. If the connection is not in autoCommit mode, all non-committed operations will be lost.

Specified by:

close in interface RepositoryConnection

Overrides:

close in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the connection could not be closed.

commit

public void commit()
            throws RepositoryException

Description copied from interface: RepositoryConnection

Commits all updates that have been performed as part of this connection sofar.

Specified by:

commit in interface RepositoryConnection

Overrides:

commit in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the connection could not be committed.

removeWithoutCommit

public void removeWithoutCommit(Resource subject,
                                URI predicate,
                                Value object,
                                Resource... contexts)
                         throws RepositoryException

Overrides:

removeWithoutCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException

removeNamespace

public void removeNamespace(String prefix)
                     throws RepositoryException

Description copied from interface: RepositoryConnection

Removes a namespace declaration by removing the association between a prefix and a namespace name.

Specified by:

removeNamespace in interface RepositoryConnection

Overrides:

removeNamespace in class RepositoryConnectionWrapper

Parameters:

prefix - The namespace prefix of which the assocation with a namespace name is to be removed.

Throws:

RepositoryException - If the namespace prefix could not be removed.

clearNamespaces

public void clearNamespaces()
                     throws RepositoryException

Description copied from interface: RepositoryConnection

Removes all namespace declarations from the repository.

Specified by:

clearNamespaces in interface RepositoryConnection

Overrides:

clearNamespaces in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the namespace declarations could not be removed.

rollback

public void rollback()
              throws RepositoryException

Description copied from interface: RepositoryConnection

Rolls back all updates that have been performed as part of this connection sofar.

Specified by:

rollback in interface RepositoryConnection

Overrides:

rollback in class RepositoryConnectionWrapper

Throws:

RepositoryException - If the connection could not be rolled back.

setAutoCommit

public void setAutoCommit(boolean autoCommit)
                   throws RepositoryException

Description copied from interface: RepositoryConnection

Enables or disables auto-commit mode for the connection. If a connection is in auto-commit mode, then all updates will be executed and committed as individual transactions. Otherwise, the updates are grouped into transactions that are terminated by a call to either RepositoryConnection.commit() or RepositoryConnection.rollback(). By default, new connections are in auto-commit mode.

NOTE: If this connection is switched to auto-commit mode during a transaction, the transaction is committed.

Specified by:

setAutoCommit in interface RepositoryConnection

Overrides:

setAutoCommit in class RepositoryConnectionWrapper

Throws:

RepositoryException - In case the mode switch failed, for example because a currently active transaction failed to commit.

See Also:

RepositoryConnection.commit()

setNamespace

public void setNamespace(String prefix,
                         String name)
                  throws RepositoryException

Description copied from interface: RepositoryConnection

Sets the prefix for a namespace.

Specified by:

setNamespace in interface RepositoryConnection

Overrides:

setNamespace in class RepositoryConnectionWrapper

Parameters:

prefix - The new prefix.

name - The namespace name that the prefix maps to.

Throws:

RepositoryException - If the namespace could not be set in the repository, for example because the repository is not writable.