Package virtuoso.jena.driver

Class VirtDataset

java.lang.Object

org.apache.jena.graph.impl.GraphBase

virtuoso.jena.driver.VirtGraph

virtuoso.jena.driver.VirtDataset

All Implemented Interfaces:

org.apache.jena.graph.Graph, org.apache.jena.graph.impl.GraphWithPerform, org.apache.jena.query.Dataset, org.apache.jena.sparql.core.Transactional

public class VirtDataset
extends VirtGraph
implements org.apache.jena.query.Dataset

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	VirtDataset.VirtDataSetGraph

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

org.apache.jena.sparql.core.Transactional.Promote

Field Summary

Fields inherited from class virtuoso.jena.driver.VirtGraph

BATCH_SIZE, batchSize, CONCUR_DEFAULT, CONCUR_OPTIMISTIC, CONCUR_PESSIMISTIC, concurencyMode, connection, DEFAULT, graphName, insertBNodeAsVirtuosoIRI, insertStringLiteralAsSimple, isXA, m_prefixMapping, macroLib, MAX_CMD_SIZE, parent_dataset, password, prefetchSize, queryTimeout, readFromAllGraphs, resetBNodesDictAfterCall, resetBNodesDictAfterCommit, roundrobin, ruleSet, S_BATCH_INSERT, sparqlPrefix, tranHandler, url_hostlist, user, useReprepare, useSameAs

Fields inherited from class org.apache.jena.graph.impl.GraphBase

capabilities, closed, gem, pm, statisticsHandler, TOSTRING_TRIPLE_BASE, TOSTRING_TRIPLE_LIMIT

Fields inherited from interface org.apache.jena.graph.Graph

emptyGraph

Constructor Summary

Constructors

Modifier	Constructor	Description
	VirtDataset()
	VirtDataset(java.lang.String url_hostlist, java.lang.String user, java.lang.String password)
	VirtDataset(java.lang.String _graphName, javax.sql.ConnectionPoolDataSource _ds)
	VirtDataset(java.lang.String _graphName, javax.sql.DataSource _ds)
	VirtDataset(java.lang.String _graphName, javax.sql.XADataSource _ds)
	VirtDataset(javax.sql.ConnectionPoolDataSource _ds)
	VirtDataset(javax.sql.DataSource _ds)
	VirtDataset(javax.sql.XADataSource _ds)
protected	VirtDataset(VirtGraph g)

Method Summary

Modifier and Type	Method	Description
void	abort()	Abort a transaction - finish the transaction and undo any changes (if a "write" transaction)
protected void	addLink(VirtGraph obj)
VirtDataset	addNamedModel(java.lang.String name, org.apache.jena.rdf.model.Model model)	Set a named graph.
VirtDataset	addNamedModel(java.lang.String name, org.apache.jena.rdf.model.Model model, boolean checkExists)	Set a named graph.
org.apache.jena.sparql.core.DatasetGraph	asDatasetGraph()	Get the dataset in graph form
void	begin(org.apache.jena.query.ReadWrite readWrite)	Start either a READ or WRITE transaction
void	begin(org.apache.jena.query.TxnType txnType)
void	close()
void	commit()	Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)
boolean	containsNamedModel(java.lang.String name)	Does the dataset contain a model with the name supplied?
void	end()	Finish the transaction - if a write transaction and commit() has not been called, then abort
org.apache.jena.sparql.util.Context	getContext()
org.apache.jena.rdf.model.Model	getDefaultModel()	Get the default graph as a Jena Model
VirtIsolationLevel	getIsolationLevel()
org.apache.jena.shared.Lock	getLock()	Get the lock for this dataset
org.apache.jena.rdf.model.Model	getNamedModel(java.lang.String name)	Get a graph by name as a Jena Model
org.apache.jena.rdf.model.Model	getUnionModel()
boolean	isInTransaction()	Say whether a transaction is active
java.util.Iterator<java.lang.String>	listNames()	List the names
boolean	promote(org.apache.jena.sparql.core.Transactional.Promote promote)	Attempt to promote a transaction from "read" mode to "write" and the transaction.
protected void	removeLink(VirtGraph obj)
VirtDataset	removeNamedModel(java.lang.String name)	Remove a named graph.
VirtDataset	replaceNamedModel(java.lang.String name, org.apache.jena.rdf.model.Model model)	Change a named graph for another uisng the same name
VirtDataset	setDefaultModel(org.apache.jena.rdf.model.Model model)	Set the background graph.
void	setIsolationLevel(VirtIsolationLevel level)
boolean	supportsTransactionAbort()
boolean	supportsTransactions()
boolean	supportsXATransactions()
org.apache.jena.query.ReadWrite	transactionMode()	Return the current mode of the transaction - "read" or "write".
org.apache.jena.query.TxnType	transactionType()	Return the transaction type used in begin(TxnType).

Methods inherited from class virtuoso.jena.driver.VirtGraph

add, appendSparqlPrefixes, bindBatchParams, clear, clear, createBNodesDict, createRuleSet, createStatement, delete, dropBNodesDict, getBatchSize, getConcurrencyMode, getConnection, getCount, getDataSource, getFetchSize, getGraphName, getGraphPassword, getGraphUrl, getGraphUser, getInsertBNodeAsVirtuosoIRI, getInsertStringLiteralAsSimple, getJdbcConcurrency, getMacroLib, getPrefixMapping, getQueryTimeout, getReadFromAllGraphs, getResetBNodesDictAfterCall, getResetBNodesDictAfterCommit, getRuleSet, getSameAs, getSparqlPrefix, getTransactionHandler, getXAResource, graphBaseContains, graphBaseContains, graphBaseFind, graphBaseFind, graphBaseSize, md_delete_Model, Node2Str, Node2Str_add, Object2Node, performAdd, performAdd, performAdd, performDelete, performDelete, prepareStatement, read, reifierSize, reifierTriples, remove, remove, removeRuleSet, setBatchSize, setConcurrencyMode, setFetchSize, setGraphName, setInsertBNodeAsVirtuosoIRI, setInsertStringLiteralAsSimple, setMacroLib, setQueryTimeout, setReadFromAllGraphs, setResetBNodesDictAfterCall, setResetBNodesDictAfterCommit, setRuleSet, setSameAs, setSparqlPrefix, startBatchAdd, stopBatchAdd

Methods inherited from class org.apache.jena.graph.impl.GraphBase

add, checkOpen, contains, contains, containsByFind, createPrefixMapping, createStatisticsHandler, delete, dependsOn, find, find, forTestingOnly_graphBaseFind, getCapabilities, getEventManager, getStatisticsHandler, graphBaseFind, isClosed, isEmpty, isIsomorphicWith, notifyAdd, notifyDelete, remove, size, toString, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jena.query.Dataset

isEmpty

Methods inherited from interface org.apache.jena.graph.Graph

find

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

begin, promote

Constructor Detail

VirtDataset

public VirtDataset()

VirtDataset

public VirtDataset(java.lang.String _graphName,
                   javax.sql.DataSource _ds)

VirtDataset

public VirtDataset(javax.sql.DataSource _ds)

VirtDataset

public VirtDataset(java.lang.String _graphName,
                   javax.sql.ConnectionPoolDataSource _ds)

VirtDataset

public VirtDataset(javax.sql.ConnectionPoolDataSource _ds)

VirtDataset

public VirtDataset(java.lang.String _graphName,
                   javax.sql.XADataSource _ds)

VirtDataset

public VirtDataset(javax.sql.XADataSource _ds)

VirtDataset

protected VirtDataset(VirtGraph g)

VirtDataset

public VirtDataset(java.lang.String url_hostlist,
                   java.lang.String user,
                   java.lang.String password)

Method Detail

getDefaultModel

public org.apache.jena.rdf.model.Model getDefaultModel()

Get the default graph as a Jena Model

Specified by:

getDefaultModel in interface org.apache.jena.query.Dataset

getUnionModel

public org.apache.jena.rdf.model.Model getUnionModel()

Specified by:

getUnionModel in interface org.apache.jena.query.Dataset

setDefaultModel

public VirtDataset setDefaultModel(org.apache.jena.rdf.model.Model model)

Set the background graph. Can be set to null for none.

Specified by:

setDefaultModel in interface org.apache.jena.query.Dataset

getNamedModel

public org.apache.jena.rdf.model.Model getNamedModel(java.lang.String name)

Get a graph by name as a Jena Model

Specified by:

getNamedModel in interface org.apache.jena.query.Dataset

containsNamedModel

public boolean containsNamedModel(java.lang.String name)

Does the dataset contain a model with the name supplied?

Specified by:

containsNamedModel in interface org.apache.jena.query.Dataset

addNamedModel

public VirtDataset addNamedModel(java.lang.String name,
                                 org.apache.jena.rdf.model.Model model,
                                 boolean checkExists)
                          throws org.apache.jena.query.LabelExistsException

Set a named graph.

Throws:

org.apache.jena.query.LabelExistsException

addNamedModel

public VirtDataset addNamedModel(java.lang.String name,
                                 org.apache.jena.rdf.model.Model model)
                          throws org.apache.jena.query.LabelExistsException

Set a named graph.

Specified by:

addNamedModel in interface org.apache.jena.query.Dataset

Throws:

org.apache.jena.query.LabelExistsException

removeNamedModel

public VirtDataset removeNamedModel(java.lang.String name)

Remove a named graph.

Specified by:

removeNamedModel in interface org.apache.jena.query.Dataset

replaceNamedModel

public VirtDataset replaceNamedModel(java.lang.String name,
                                     org.apache.jena.rdf.model.Model model)

Change a named graph for another uisng the same name

Specified by:

replaceNamedModel in interface org.apache.jena.query.Dataset

listNames

public java.util.Iterator<java.lang.String> listNames()

List the names

Specified by:

listNames in interface org.apache.jena.query.Dataset

getLock

public org.apache.jena.shared.Lock getLock()

Get the lock for this dataset

Specified by:

getLock in interface org.apache.jena.query.Dataset

getContext

public org.apache.jena.sparql.util.Context getContext()

Specified by:

getContext in interface org.apache.jena.query.Dataset

supportsTransactions

public boolean supportsTransactions()

Specified by:

supportsTransactions in interface org.apache.jena.query.Dataset

supportsXATransactions

public boolean supportsXATransactions()

supportsTransactionAbort

public boolean supportsTransactionAbort()

Specified by:

supportsTransactionAbort in interface org.apache.jena.query.Dataset

begin

public void begin(org.apache.jena.query.TxnType txnType)

Specified by:

begin in interface org.apache.jena.sparql.core.Transactional

begin

public void begin(org.apache.jena.query.ReadWrite readWrite)

Start either a READ or WRITE transaction

Specified by:

begin in interface org.apache.jena.query.Dataset

Specified by:

begin in interface org.apache.jena.sparql.core.Transactional

promote

public boolean promote(org.apache.jena.sparql.core.Transactional.Promote promote)

Attempt to promote a transaction from "read" mode to "write" and the transaction. This method allows the form of promotion to be specified. The transaction must not have been started with READ, which is read-only.

An argument of READ_PROMOTE treats the promotion as if the transaction was started with READ_PROMOTE (any other writer commiting since the transaction started blocks promotion) and READ_COMMITTED_PROMOTE treats the promotion as if the transaction was started with READ_COMMITTED_PROMOTE (intemediate writer commits become visible).

Returns "true" if the transaction is in write mode after the call. The method always succeeds of the transaction is already "write".

This method returns true if a READ_PROMOTE or READ_COMMITTED_PROMOTE is promoted.

This method returns false if a READ_PROMOTE can't be promoted - the transaction is still valid and in "read" mode.

This method throws an exception if there is an attempt to promote a READ transaction.

Specified by:

promote in interface org.apache.jena.sparql.core.Transactional

commit

public void commit()

Commit a transaction - finish the transaction and make any changes permanent (if a "write" transaction)

Specified by:

commit in interface org.apache.jena.query.Dataset

Specified by:

commit in interface org.apache.jena.sparql.core.Transactional

abort

public void abort()

Abort a transaction - finish the transaction and undo any changes (if a "write" transaction)

Specified by:

abort in interface org.apache.jena.query.Dataset

Specified by:

abort in interface org.apache.jena.sparql.core.Transactional

isInTransaction

public boolean isInTransaction()

Say whether a transaction is active

Specified by:

isInTransaction in interface org.apache.jena.query.Dataset

Specified by:

isInTransaction in interface org.apache.jena.sparql.core.Transactional

setIsolationLevel

public void setIsolationLevel(VirtIsolationLevel level)

getIsolationLevel

public VirtIsolationLevel getIsolationLevel()

end

public void end()

Finish the transaction - if a write transaction and commit() has not been called, then abort

Specified by:

end in interface org.apache.jena.query.Dataset

Specified by:

end in interface org.apache.jena.sparql.core.Transactional

transactionMode

public org.apache.jena.query.ReadWrite transactionMode()

Return the current mode of the transaction - "read" or "write". If the caller is not in a transaction, this method returns null.

Specified by:

transactionMode in interface org.apache.jena.sparql.core.Transactional

transactionType

public org.apache.jena.query.TxnType transactionType()

Return the transaction type used in begin(TxnType). If the caller is not in a transaction, this method returns null.

Specified by:

transactionType in interface org.apache.jena.sparql.core.Transactional

close

public void close()

Specified by:

close in interface org.apache.jena.query.Dataset

Specified by:

close in interface org.apache.jena.graph.Graph

Overrides:

close in class VirtGraph

addLink

protected void addLink(VirtGraph obj)

removeLink

protected void removeLink(VirtGraph obj)

asDatasetGraph

public org.apache.jena.sparql.core.DatasetGraph asDatasetGraph()

Get the dataset in graph form

Specified by:

asDatasetGraph in interface org.apache.jena.query.Dataset