org.openrdf.sail.memory
Class MemoryStoreConnection

java.lang.Object
  org.openrdf.sail.helpers.SailConnectionBase
      org.openrdf.sail.helpers.NotifyingSailConnectionBase
          org.openrdf.sail.memory.MemoryStoreConnection

All Implemented Interfaces:

InferencerConnection, NotifyingSailConnection, SailConnection

public class MemoryStoreConnection
extends NotifyingSailConnectionBase
implements InferencerConnection

Implementation of a Sail Connection for memory stores.

Author:

Arjohn Kampman, jeen

Nested Class Summary

protected class	MemoryStoreConnection.MemEvaluationStatistics Uses the MemoryStore's statement sizes to give cost estimates based on the size of the expected results.
protected class	MemoryStoreConnection.MemTripleSource Implementation of the TripleSource interface from the Sail Query Model

Field Summary

protected MemoryStore

store

Fields inherited from class org.openrdf.sail.helpers.SailConnectionBase

logger

Constructor Summary

protected

MemoryStoreConnection(MemoryStore store)

Method Summary

boolean	addInferredStatement(Resource subj, URI pred, Value obj, Resource... contexts) Adds an inferred statement to a specific context.
protected boolean	addStatementInternal(Resource subj, URI pred, Value obj, boolean explicit, Resource... contexts) Adds the specified statement to this MemoryStore.
protected void	addStatementInternal(Resource subj, URI pred, Value obj, Resource... contexts)
void	clearInferred(Resource... contexts) Removes all inferred statements from the specified/all contexts.
protected void	clearInternal(Resource... contexts)
protected void	clearNamespacesInternal()
protected void	closeInternal()
protected void	commitInternal()
protected CloseableIteration<? extends BindingSet,QueryEvaluationException>	evaluateInternal(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings, boolean includeInferred)
void	flushUpdates() Flushes any pending updates to be processed and the resulting changes to be reported to registered SailConnectionListeners.
protected CloseableIteration<? extends Resource,SailException>	getContextIDsInternal()
protected String	getNamespaceInternal(String prefix)
protected CloseableIteration<? extends Namespace,SailException>	getNamespacesInternal()
protected CloseableIteration<? extends Statement,SailException>	getStatementsInternal(Resource subj, URI pred, Value obj, boolean includeInferred, Resource... contexts)
boolean	removeInferredStatement(Resource subj, URI pred, Value obj, Resource... contexts) Removes an inferred statement from a specific context.
protected boolean	removeIteratorStatements(CloseableIteration<MemStatement,SailException> stIter, boolean explicit)
protected void	removeNamespaceInternal(String prefix)
protected boolean	removeStatementsInternal(Resource subj, URI pred, Value obj, boolean explicit, Resource... contexts) Removes the statements that match the specified pattern of subject, predicate, object and context.
protected void	removeStatementsInternal(Resource subj, URI pred, Value obj, Resource... contexts)
protected void	rollbackInternal()
protected void	setNamespaceInternal(String prefix, String name)
protected long	sizeInternal(Resource... contexts)
protected void	startTransactionInternal()

Methods inherited from class org.openrdf.sail.helpers.NotifyingSailConnectionBase

addConnectionListener, hasConnectionListeners, notifyStatementAdded, notifyStatementRemoved, removeConnectionListener

Methods inherited from class org.openrdf.sail.helpers.SailConnectionBase

addStatement, autoStartTransaction, clear, clearNamespaces, close, commit, evaluate, finalize, getContextIDs, getExclusiveConnectionLock, getNamespace, getNamespaces, getSharedConnectionLock, getStatements, getTransactionLock, isOpen, iterationClosed, registerIteration, removeNamespace, removeStatements, rollback, setNamespace, size, transactionActive, verifyIsOpen

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.openrdf.sail.NotifyingSailConnection

addConnectionListener, removeConnectionListener

Methods inherited from interface org.openrdf.sail.SailConnection

addStatement, clear, clearNamespaces, close, commit, evaluate, getContextIDs, getNamespace, getNamespaces, getStatements, isOpen, removeNamespace, removeStatements, rollback, setNamespace, size

Field Detail

store

protected final MemoryStore store

Constructor Detail

MemoryStoreConnection

protected MemoryStoreConnection(MemoryStore store)

Method Detail

evaluateInternal

protected CloseableIteration<? extends BindingSet,QueryEvaluationException> evaluateInternal(TupleExpr tupleExpr,
                                                                                             Dataset dataset,
                                                                                             BindingSet bindings,
                                                                                             boolean includeInferred)
                                                                                      throws SailException

Specified by:

evaluateInternal in class SailConnectionBase

Throws:

SailException

closeInternal

protected void closeInternal()
                      throws SailException

Specified by:

closeInternal in class SailConnectionBase

Throws:

SailException

getContextIDsInternal

protected CloseableIteration<? extends Resource,SailException> getContextIDsInternal()
                                                                              throws SailException

Specified by:

getContextIDsInternal in class SailConnectionBase

Throws:

SailException

getStatementsInternal

protected CloseableIteration<? extends Statement,SailException> getStatementsInternal(Resource subj,
                                                                                      URI pred,
                                                                                      Value obj,
                                                                                      boolean includeInferred,
                                                                                      Resource... contexts)
                                                                               throws SailException

Specified by:

getStatementsInternal in class SailConnectionBase

Throws:

SailException

sizeInternal

protected long sizeInternal(Resource... contexts)
                     throws SailException

Specified by:

sizeInternal in class SailConnectionBase

Throws:

SailException

getNamespacesInternal

protected CloseableIteration<? extends Namespace,SailException> getNamespacesInternal()
                                                                               throws SailException

Specified by:

getNamespacesInternal in class SailConnectionBase

Throws:

SailException

getNamespaceInternal

protected String getNamespaceInternal(String prefix)
                               throws SailException

Specified by:

getNamespaceInternal in class SailConnectionBase

Throws:

SailException

startTransactionInternal

protected void startTransactionInternal()
                                 throws SailException

Specified by:

startTransactionInternal in class SailConnectionBase

Throws:

SailException

commitInternal

protected void commitInternal()
                       throws SailException

Specified by:

commitInternal in class SailConnectionBase

Throws:

SailException

rollbackInternal

protected void rollbackInternal()
                         throws SailException

Specified by:

rollbackInternal in class SailConnectionBase

Throws:

SailException

addStatementInternal

protected void addStatementInternal(Resource subj,
                                    URI pred,
                                    Value obj,
                                    Resource... contexts)
                             throws SailException

Specified by:

addStatementInternal in class SailConnectionBase

Throws:

SailException

addInferredStatement

public boolean addInferredStatement(Resource subj,
                                    URI pred,
                                    Value obj,
                                    Resource... contexts)
                             throws SailException

Description copied from interface: InferencerConnection

Adds an inferred statement to a specific context.

Specified by:

addInferredStatement in interface InferencerConnection

Parameters:

subj - The subject of the statement to add.

pred - The predicate of the statement to add.

obj - The object of the statement to add.

contexts - The context(s) to add the statement to. 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:

SailException - If the statement could not be added.

addStatementInternal

protected boolean addStatementInternal(Resource subj,
                                       URI pred,
                                       Value obj,
                                       boolean explicit,
                                       Resource... contexts)
                                throws SailException

Adds the specified statement to this MemoryStore.

Throws:

SailException

removeStatementsInternal

protected void removeStatementsInternal(Resource subj,
                                        URI pred,
                                        Value obj,
                                        Resource... contexts)
                                 throws SailException

Specified by:

removeStatementsInternal in class SailConnectionBase

Throws:

SailException

removeInferredStatement

public boolean removeInferredStatement(Resource subj,
                                       URI pred,
                                       Value obj,
                                       Resource... contexts)
                                throws SailException

Description copied from interface: InferencerConnection

Removes an inferred statement from a specific context.

Specified by:

removeInferredStatement in interface InferencerConnection

Parameters:

subj - The subject of the statement that should be removed.

pred - The predicate of the statement that should be removed.

obj - The object of the statement that should be removed.

contexts - The context(s) from which to remove the statements. 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:

SailException - If the statement could not be removed.

clearInternal

protected void clearInternal(Resource... contexts)
                      throws SailException

Specified by:

clearInternal in class SailConnectionBase

Throws:

SailException

clearInferred

public void clearInferred(Resource... contexts)
                   throws SailException

Description copied from interface: InferencerConnection

Removes all inferred statements from the specified/all contexts. If no contexts are specified the method operates on the entire repository.

Specified by:

clearInferred in interface InferencerConnection

Parameters:

contexts - The context(s) from which to remove the statements. 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:

SailException - If the statements could not be removed.

flushUpdates

public void flushUpdates()

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

removeStatementsInternal

protected boolean removeStatementsInternal(Resource subj,
                                           URI pred,
                                           Value obj,
                                           boolean explicit,
                                           Resource... contexts)
                                    throws SailException

Removes the statements that match the specified pattern of subject, predicate, object and context.

Parameters:

subj - The subject for the pattern, or null for a wildcard.

pred - The predicate for the pattern, or null for a wildcard.

obj - The object for the pattern, or null for a wildcard.

explicit - Flag indicating whether explicit or inferred statements should be removed; true removes explicit statements that match the pattern, false removes inferred statements that match the pattern.

Throws:

SailException

removeIteratorStatements

protected boolean removeIteratorStatements(CloseableIteration<MemStatement,SailException> stIter,
                                           boolean explicit)
                                    throws SailException

Throws:

SailException

setNamespaceInternal

protected void setNamespaceInternal(String prefix,
                                    String name)
                             throws SailException

Specified by:

setNamespaceInternal in class SailConnectionBase

Throws:

SailException

removeNamespaceInternal

protected void removeNamespaceInternal(String prefix)
                                throws SailException

Specified by:

removeNamespaceInternal in class SailConnectionBase

Throws:

SailException

clearNamespacesInternal

protected void clearNamespacesInternal()
                                throws SailException

Specified by:

clearNamespacesInternal in class SailConnectionBase

Throws:

SailException