Package org.eclipse.rdf4j.sail.inferencer.fc

Class AbstractForwardChainingInferencerConnection

java.lang.Object

org.eclipse.rdf4j.sail.helpers.SailConnectionWrapper

org.eclipse.rdf4j.sail.helpers.NotifyingSailConnectionWrapper

org.eclipse.rdf4j.sail.inferencer.InferencerConnectionWrapper

org.eclipse.rdf4j.sail.inferencer.fc.AbstractForwardChainingInferencerConnection

All Implemented Interfaces:

AutoCloseable, FederatedServiceResolverClient, ThreadSafetyAware, InferencerConnection, NotifyingSailConnection, SailConnection, SailConnectionListener

public abstract class AbstractForwardChainingInferencerConnection
extends InferencerConnectionWrapper
implements SailConnectionListener

Field Summary

Fields

Modifier and Type	Field	Description
protected int	totalInferred

Constructor Summary

Constructors

Constructor	Description
AbstractForwardChainingInferencerConnection(Sail sail, InferencerConnection con)

Method Summary

Modifier and Type	Method	Description
protected abstract void	addAxiomStatements()	Adds all basic set of axiom statements from which the complete set can be inferred to the underlying Sail.
protected abstract int	applyRules(Model iteration)	Returns the number of newly inferred statements.
void	begin()	Begins a transaction requiring SailConnection.commit() or SailConnection.rollback() to be called to close the transaction.
void	begin(IsolationLevel level)	Begins a transaction with the specified IsolationLevel level, requiring SailConnection.commit() or SailConnection.rollback() to be called to close the transaction.
protected abstract Model	createModel()
protected void	doInferencing()
void	flushUpdates()	Flushes any pending updates to be processed and the resulting changes to be reported to registered SailConnectionListeners.
protected boolean	hasNewStatements()
protected boolean	needsFullRecomputation()	Indicates if a full recomputation of the deductive closure is needed.
protected Model	prepareIteration()
void	rollback()	Rolls back the transaction, discarding any uncommitted changes that have been made in this SailConnection.
void	statementAdded(Statement st)	Notifies the listener that a statement has been added in a transaction that it has registered itself with.
void	statementRemoved(Statement st)	Notifies the listener that a statement has been removed in a transaction that it has registered itself with.

Methods inherited from class org.eclipse.rdf4j.sail.inferencer.InferencerConnectionWrapper

addInferredStatement, clearInferred, commit, evaluate, flush, getContextIDs, getStatements, getWrappedConnection, hasStatement, prepare, removeInferredStatement, size

Methods inherited from class org.eclipse.rdf4j.sail.helpers.NotifyingSailConnectionWrapper

addConnectionListener, removeConnectionListener

Methods inherited from class org.eclipse.rdf4j.sail.helpers.SailConnectionWrapper

addStatement, addStatement, clear, clearNamespaces, close, endUpdate, explain, getNamespace, getNamespaces, isActive, isOpen, pendingRemovals, prepareQuery, removeNamespace, removeStatement, removeStatements, setFederatedServiceResolver, setNamespace, setTransactionSettings, size, startUpdate, supportsConcurrentReads

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.sail.NotifyingSailConnection

addConnectionListener, removeConnectionListener

Methods inherited from interface org.eclipse.rdf4j.sail.SailConnection

addStatement, addStatement, clear, clearNamespaces, close, endUpdate, explain, getNamespace, getNamespaces, isActive, isOpen, pendingRemovals, prepareQuery, removeNamespace, removeStatement, removeStatements, setNamespace, setTransactionSettings, startUpdate

Field Detail

totalInferred

protected int totalInferred

Constructor Detail

AbstractForwardChainingInferencerConnection

public AbstractForwardChainingInferencerConnection(Sail sail,
                                                   InferencerConnection con)

Method Detail

statementAdded

public void statementAdded(Statement st)

Description copied from interface: SailConnectionListener

Notifies the listener that a statement has been added in a transaction that it has registered itself with.

Specified by:

statementAdded in interface SailConnectionListener

Parameters:

st - The statement that was added.

createModel

protected abstract Model createModel()

statementRemoved

public void statementRemoved(Statement st)

Description copied from interface: SailConnectionListener

Notifies the listener that a statement has been removed in a transaction that it has registered itself with.

Specified by:

statementRemoved in interface SailConnectionListener

Parameters:

st - The statement that was removed.

flushUpdates

public void flushUpdates()
                  throws SailException

Description copied from interface: InferencerConnection

Flushes any pending updates to be processed and the resulting changes to be reported to registered SailConnectionListeners.

Specified by:

flushUpdates in interface InferencerConnection

Overrides:

flushUpdates in class InferencerConnectionWrapper

Throws:

SailException - If the updates could not be processed.

begin

public void begin()
           throws SailException

Description copied from interface: SailConnection

Begins a transaction requiring SailConnection.commit() or SailConnection.rollback() to be called to close the transaction. The transaction will use the default IsolationLevel level for the SAIL, as returned by Sail.getDefaultIsolationLevel().

Specified by:

begin in interface SailConnection

Overrides:

begin in class SailConnectionWrapper

Throws:

SailException - If the connection could not start a transaction or if a transaction is already active on this connection.

begin

public void begin(IsolationLevel level)
           throws SailException

Description copied from interface: SailConnection

Begins a transaction with the specified IsolationLevel level, requiring SailConnection.commit() or SailConnection.rollback() to be called to close the transaction.

Specified by:

begin in interface SailConnection

Overrides:

begin in class SailConnectionWrapper

Parameters:

level - the transaction isolation level on which this transaction operates.

Throws:

UnknownSailTransactionStateException - If the IsolationLevel is not supported by this implementation

SailException - If the connection could not start a transaction, if the supplied transaction isolation level is not supported, or if a transaction is already active on this connection.

rollback

public void rollback()
              throws SailException

Description copied from interface: SailConnection

Rolls back the transaction, discarding any uncommitted changes that have been made in this SailConnection.

Specified by:

rollback in interface SailConnection

Overrides:

rollback in class SailConnectionWrapper

Throws:

UnknownSailTransactionStateException - If the transaction state can not be determined (this can happen for instance when communication between client and server fails or times-out). It does not indicate a problem with the integrity of the store.

SailException - If the SailConnection could not be rolled back.

addAxiomStatements

protected abstract void addAxiomStatements()
                                    throws SailException

Adds all basic set of axiom statements from which the complete set can be inferred to the underlying Sail.

Throws:

SailException

doInferencing

protected void doInferencing()
                      throws SailException

Throws:

SailException

applyRules

protected abstract int applyRules(Model iteration)
                           throws SailException

Returns the number of newly inferred statements.

Throws:

SailException

prepareIteration

protected Model prepareIteration()

hasNewStatements

protected boolean hasNewStatements()

needsFullRecomputation

protected boolean needsFullRecomputation()

Indicates if a full recomputation of the deductive closure is needed.