Class SPARQLRepository

java.lang.Object

org.eclipse.rdf4j.repository.base.AbstractRepository

org.eclipse.rdf4j.repository.sparql.SPARQLRepository

All Implemented Interfaces:

HttpClientDependent, SessionManagerDependent, Repository

public class SPARQLRepository
extends AbstractRepository
implements HttpClientDependent, SessionManagerDependent

A proxy class to access any SPARQL 1.1 endpoint.

Author:

James Leigh

Field Summary

Fields inherited from class AbstractRepository

logger

Modifier and Type	Field	Description
protected final org.slf4j.Logger	logger

Constructor Summary

Constructors

Constructor	Description
SPARQLRepository(String endpointUrl)	Create a new SPARQLRepository using the supplied endpoint URL for queries and updates.
SPARQLRepository(String queryEndpointUrl, String updateEndpointUrl)	Create a new SPARQLRepository using the supplied query endpoint URL for queries, and the supplied update endpoint URL for updates.

Method Summary

Modifier and Type	Method	Description
protected SPARQLProtocolSession	createHTTPClient()	Deprecated. use createSPARQLProtocolSession() instead
protected SPARQLProtocolSession	createSPARQLProtocolSession()	Creates a new SPARQLProtocolSession object.
void	enableQuadMode(boolean flag)	Activate quad mode for this SPARQLRepository, i.e. for retrieval of statements also retrieve the graph.
Map<String,String>	getAdditionalHttpHeaders()	Get the additional HTTP headers which will be used
RepositoryConnection	getConnection()	Opens a connection to this repository that can be used for querying and updating the contents of the repository.
File	getDataDir()	Get the directory where data and logging for this repository is stored.
final RDF4JHttpClient	getHttpClient()	RDF4JHttpClient that has been assigned or has been used by this object.
HttpClientSessionManager	getHttpClientSessionManager()	HttpClientSessionManager that has been assigned or has been used by this object.
Boolean	getPassThroughEnabled()	Retrieve the passThroughEnabled setting to be used for any newly created RepositoryConnections.
ValueFactory	getValueFactory()	Gets a ValueFactory for this Repository.
protected void	initializeInternal()
boolean	isWritable()	Checks whether this repository is writable, i.e. if the data contained in this repository can be changed.
void	setAdditionalHttpHeaders(Map<String,String> additionalHttpHeaders)	Set additional HTTP headers to be included in every request to the server, which may be required for certain unusual server configurations.
void	setDataDir(File dataDir)	Set the directory where data and logging for this repository is stored.
void	setHttpClient(RDF4JHttpClient httpClient)	Assign an RDF4JHttpClient that this object should use.
void	setHttpClientSessionManager(HttpClientSessionManager client)	Assign an HttpClientSessionManager that this object should use.
void	setPassThroughEnabled(Boolean passThroughEnabled)	Set the passThroughEnabled configuration.
void	setUsernameAndPassword(String username, String password)	Set the username and password to use for authenticating with the remote repository.
protected void	shutDownInternal()
String	toString()

Methods inherited from class AbstractRepository

init, isInitialized, shutDown

Modifier and Type	Method	Description
final void	init()	Initializes this repository.
final boolean	isInitialized()	Indicates if the Repository has been initialized.
final void	shutDown()	Shuts the repository down, releasing any resources that it keeps hold of.

Methods inherited from class Object

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

Constructor Details

SPARQLRepository

public SPARQLRepository(String endpointUrl)

Create a new SPARQLRepository using the supplied endpoint URL for queries and updates.

Parameters:

endpointUrl - a SPARQL endpoint URL. May not be null.

SPARQLRepository

public SPARQLRepository(String queryEndpointUrl,
 String updateEndpointUrl)

Create a new SPARQLRepository using the supplied query endpoint URL for queries, and the supplied update endpoint URL for updates.

Parameters:

queryEndpointUrl - a SPARQL endpoint URL for queries. May not be null.

updateEndpointUrl - a SPARQL endpoint URL for updates. May not be null.

Throws:

IllegalArgumentException - if one of the supplied endpoint URLs is null.

Method Details

getHttpClientSessionManager

public HttpClientSessionManager getHttpClientSessionManager()

Description copied from interface: SessionManagerDependent

HttpClientSessionManager that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether HttpClientSessionManager was passed to or created by this object respectively.

Specified by:

getHttpClientSessionManager in interface SessionManagerDependent

Returns:

a HttpClientSessionManager instance or null

setHttpClientSessionManager

public void setHttpClientSessionManager(HttpClientSessionManager client)

Description copied from interface: SessionManagerDependent

Assign an HttpClientSessionManager that this object should use. The life cycle of the given HttpClientSessionManager is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setHttpClientSessionManager in interface SessionManagerDependent

Parameters:

client -

getHttpClient

public final RDF4JHttpClient getHttpClient()

Description copied from interface: HttpClientDependent

RDF4JHttpClient that has been assigned or has been used by this object. The life cycle might not be or might be tied to this object, depending on whether RDF4JHttpClient was passed to or created by this object respectively.

Specified by:

getHttpClient in interface HttpClientDependent

Returns:

an RDF4JHttpClient instance or null

setHttpClient

public void setHttpClient(RDF4JHttpClient httpClient)

Description copied from interface: HttpClientDependent

Assign an RDF4JHttpClient that this object should use. The life cycle of the given RDF4JHttpClient is independent of this object. Closing or shutting down this object does not have any impact on the given client. Callers must ensure that the given client is properly closed elsewhere.

Specified by:

setHttpClient in interface HttpClientDependent

Parameters:

httpClient -

createSPARQLProtocolSession

protected SPARQLProtocolSession createSPARQLProtocolSession()

Creates a new SPARQLProtocolSession object. The life-cycle of this is per-connection.

Returns:

a SPARQLProtocolSession object.

createHTTPClient

@Deprecated
protected SPARQLProtocolSession createHTTPClient()

Deprecated.

use createSPARQLProtocolSession() instead

getConnection

public RepositoryConnection getConnection()
                                   throws RepositoryException

Description copied from interface: Repository

Opens a connection to this repository that can be used for querying and updating the contents of the repository. Created connections need to be closed to make sure that any resources they keep hold of are released. The best way to do this is to use a try-with-resources block, as follows:

try (RepositoryConnection conn = repository.getConnection()) {
        // perform operations on the connection
}

Note that RepositoryConnection is not guaranteed to be thread-safe! The recommended pattern for repository access in a multi-threaded application is to share the Repository object between threads, but have each thread create and use its own RepositoryConnections.

Specified by:

getConnection in interface Repository

Returns:

A connection that allows operations on this repository.

Throws:

RepositoryException - If something went wrong during the creation of the Connection.

getDataDir

public File getDataDir()

Description copied from interface: Repository

Get the directory where data and logging for this repository is stored.

Specified by:

getDataDir in interface Repository

Returns:

the directory where data for this repository is stored.

getValueFactory

public ValueFactory getValueFactory()

Description copied from interface: Repository

Gets a ValueFactory for this Repository.

Specified by:

getValueFactory in interface Repository

Returns:

A repository-specific ValueFactory.

initializeInternal

protected void initializeInternal()
                           throws RepositoryException

Specified by:

initializeInternal in class AbstractRepository

Throws:

RepositoryException

isWritable

public boolean isWritable()
                   throws RepositoryException

Description copied from interface: Repository

Checks whether this repository is writable, i.e. if the data contained in this repository can be changed. The writability of the repository is determined by the writability of the Sail that this repository operates on.

Specified by:

isWritable in interface Repository

Throws:

RepositoryException

setDataDir

public void setDataDir(File dataDir)

Description copied from interface: Repository

Set the directory where data and logging for this repository is stored.

Specified by:

setDataDir in interface Repository

Parameters:

dataDir - the directory where data for this repository is stored

setUsernameAndPassword

public void setUsernameAndPassword(String username,
 String password)

Set the username and password to use for authenticating with the remote repository.

Parameters:

username - the username. Setting this to null will disable authentication.

password - the password. Setting this to null will disable authentication.

shutDownInternal

protected void shutDownInternal()
                         throws RepositoryException

Specified by:

shutDownInternal in class AbstractRepository

Throws:

RepositoryException

toString

public String toString()

Overrides:

toString in class Object

getAdditionalHttpHeaders

public Map<String,String> getAdditionalHttpHeaders()

Get the additional HTTP headers which will be used

Returns:

a read-only view of the additional HTTP headers which will be included in every request to the server.

setAdditionalHttpHeaders

public void setAdditionalHttpHeaders(Map<String,String> additionalHttpHeaders)

Set additional HTTP headers to be included in every request to the server, which may be required for certain unusual server configurations. This will only take effect on connections subsequently returned by getConnection().

Parameters:

additionalHttpHeaders - a map containing pairs of header names and values. May be null

enableQuadMode

public void enableQuadMode(boolean flag)

Activate quad mode for this SPARQLRepository, i.e. for retrieval of statements also retrieve the graph.

Note: the setting is only applied in newly created SPARQLConnections as the setting is an immutable configuration of a connection instance.

Parameters:

flag - flag to enable or disable the quad mode

See Also:

• SPARQLConnection.getStatements(org.eclipse.rdf4j.model.Resource, org.eclipse.rdf4j.model.URI, org.eclipse.rdf4j.model.Value, boolean, org.eclipse.rdf4j.model.Resource...)

getPassThroughEnabled

public Boolean getPassThroughEnabled()

Retrieve the passThroughEnabled setting to be used for any newly created RepositoryConnections.

Returns:

the passThroughEnabled setting. May be null if not explicitly configured.

See Also:

• SPARQLProtocolSession.isPassThroughEnabled()

setPassThroughEnabled

public void setPassThroughEnabled(Boolean passThroughEnabled)

Set the passThroughEnabled configuration. Changing this will influence behavior of any new RepositoryConnections, but not of existing ones.

Parameters:

passThroughEnabled - the passThroughEnabled to set

See Also:

• invalid reference

  SPARQLProtocolSession#setPassThroughEnabled()