Module org.apache.jena.rdfpatch

Package org.apache.jena.rdfpatch.system

Class DatasetGraphChanges

java.lang.Object

org.apache.jena.sparql.core.DatasetGraphWrapper

org.apache.jena.rdfpatch.system.DatasetGraphChanges

All Implemented Interfaces:

org.apache.jena.atlas.lib.Closeable, org.apache.jena.atlas.lib.Sync, DatasetGraph, Transactional

public class DatasetGraphChanges
extends DatasetGraphWrapper

Connect a DatasetGraph with RDFChanges. All operations on the DatasetGraph that cause changes have the change sent to the RDFChanges.

Optionally, a sync handler can be given that is called on sync() or begin. This class is stateless so updating the wrapped dataset is possible via the sync handler.

Synchronization can also be performed externally on the wrapped dataset.

Use DatasetGraphRealChanges to get a dataset that logs only changes that have a real effect - that makes the changes log reversible (play delete for each add) to undo a sequence of changes.

See Also:

• DatasetGraphRealChanges
• RDFChanges

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.jena.sparql.core.Transactional

Transactional.Promote

Constructor Summary

Constructors

Constructor	Description
DatasetGraphChanges(DatasetGraph dsg, RDFChanges monitor)	Create a DatasetGraphChanges which does not have any sync handlers
DatasetGraphChanges(DatasetGraph dsg, RDFChanges changesMonitor, Runnable syncHandler, Consumer<ReadWrite> txnSyncHandler)	Create a DatasetGraphChanges which calls different patch log synchronization handlers on sync() and begin().

Method Summary

Modifier and Type	Method	Description
void	abort()
void	add(Node g, Node s, Node p, Node o)
void	add(Quad quad)
void	addGraph(Node graphName, Graph data)
void	begin()
void	begin(ReadWrite readWrite)
void	begin(TxnType txnType)
void	commit()
void	delete(Node g, Node s, Node p, Node o)
void	delete(Quad quad)
void	deleteAny(Node g, Node s, Node p, Node o)
Graph	getDefaultGraph()
Graph	getGraph(Node graphNode)
RDFChanges	getMonitor()
boolean	promote()
boolean	promote(Transactional.Promote type)
void	removeGraph(Node graphName)
void	sync()

Methods inherited from class org.apache.jena.sparql.core.DatasetGraphWrapper

clear, close, contains, contains, containsGraph, end, find, find, find, findNG, getBase, getBaseForQuery, getContext, getLock, getUnionGraph, getWrapped, isEmpty, isInTransaction, listGraphNodes, prefixes, setDefaultGraph, size, supportsTransactionAbort, supportsTransactions, toString, transactionMode, transactionType, unwrap

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.jena.sparql.core.DatasetGraph

addAll, stream, stream

Methods inherited from interface org.apache.jena.sparql.core.Transactional

calc, calculate, calculateRead, calculateWrite, exec, execute, executeRead, executeWrite

Constructor Details

DatasetGraphChanges

public DatasetGraphChanges(DatasetGraph dsg,
 RDFChanges monitor)

Create a DatasetGraphChanges which does not have any sync handlers

DatasetGraphChanges

public DatasetGraphChanges(DatasetGraph dsg,
 RDFChanges changesMonitor,
 Runnable syncHandler,
 Consumer<ReadWrite> txnSyncHandler)

Create a DatasetGraphChanges which calls different patch log synchronization handlers on sync() and begin(). syncHandler defaults (with null) to "no action". Transactional usage preferred.

Method Details

getMonitor

public RDFChanges getMonitor()

sync

public void sync()

Specified by:

sync in interface org.apache.jena.atlas.lib.Sync

Overrides:

sync in class DatasetGraphWrapper

add

public void add(Quad quad)

Specified by:

add in interface DatasetGraph

Overrides:

add in class DatasetGraphWrapper

delete

public void delete(Quad quad)

Specified by:

delete in interface DatasetGraph

Overrides:

delete in class DatasetGraphWrapper

add

public void add(Node g,
 Node s,
 Node p,
 Node o)

Specified by:

add in interface DatasetGraph

Overrides:

add in class DatasetGraphWrapper

delete

public void delete(Node g,
 Node s,
 Node p,
 Node o)

Specified by:

delete in interface DatasetGraph

Overrides:

delete in class DatasetGraphWrapper

getDefaultGraph

public Graph getDefaultGraph()

Specified by:

getDefaultGraph in interface DatasetGraph

Overrides:

getDefaultGraph in class DatasetGraphWrapper

getGraph

public Graph getGraph(Node graphNode)

Specified by:

getGraph in interface DatasetGraph

Overrides:

getGraph in class DatasetGraphWrapper

addGraph

public void addGraph(Node graphName,
 Graph data)

Specified by:

addGraph in interface DatasetGraph

Overrides:

addGraph in class DatasetGraphWrapper

removeGraph

public void removeGraph(Node graphName)

Specified by:

removeGraph in interface DatasetGraph

Overrides:

removeGraph in class DatasetGraphWrapper

deleteAny

public void deleteAny(Node g,
 Node s,
 Node p,
 Node o)

Specified by:

deleteAny in interface DatasetGraph

Overrides:

deleteAny in class DatasetGraphWrapper

begin

public void begin()

Specified by:

begin in interface Transactional

Overrides:

begin in class DatasetGraphWrapper

begin

public void begin(TxnType txnType)

Specified by:

begin in interface Transactional

Overrides:

begin in class DatasetGraphWrapper

begin

public void begin(ReadWrite readWrite)

Specified by:

begin in interface Transactional

Overrides:

begin in class DatasetGraphWrapper

promote

public boolean promote()

Specified by:

promote in interface Transactional

Overrides:

promote in class DatasetGraphWrapper

promote

public boolean promote(Transactional.Promote type)

Specified by:

promote in interface Transactional

Overrides:

promote in class DatasetGraphWrapper

commit

public void commit()

Specified by:

commit in interface Transactional

Overrides:

commit in class DatasetGraphWrapper

abort

public void abort()

Specified by:

abort in interface Transactional

Overrides:

abort in class DatasetGraphWrapper