Package org.eclipse.rdf4j.rio.helpers

Class RDFHandlerWrapper

java.lang.Object

org.eclipse.rdf4j.rio.helpers.RDFHandlerWrapper

All Implemented Interfaces:

RDFHandler

Direct Known Subclasses:

BufferedGroupingRDFHandler, TimeLimitRDFHandler

public class RDFHandlerWrapper
extends Object
implements RDFHandler

Convenience base class for RDF handlers that wrap one or more other RDF handler. This class provides default methods that forward method calls to the wrapped RDF handler(s).

Author:

Arjohn Kampman, Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
RDFHandlerWrapper(ModelFactory modelFactory, RDFHandler... rdfHandlers)	Creates a new RDFHandlerWrapper that wraps the supplied RDF handler(s).
RDFHandlerWrapper(RDFHandler... rdfHandlers)	Creates a new RDFHandlerWrapper that wraps the supplied RDF handler(s).

Method Summary

Modifier and Type	Method	Description
void	endRDF()	Signals the end of the RDF data.
ModelFactory	getModelFactory()
void	handleComment(String comment)	Handles a comment.
void	handleNamespace(String prefix, String uri)	Handles a namespace declaration/definition.
void	handleStatement(Statement st)	Handles a statement.
void	startRDF()	Signals the start of the RDF data.

Methods inherited from class java.lang.Object

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

Constructor Detail

RDFHandlerWrapper

public RDFHandlerWrapper(RDFHandler... rdfHandlers)

Creates a new RDFHandlerWrapper that wraps the supplied RDF handler(s). If more than one RDFHandler is supplied for wrapping, the RDFHandlerWrapper forwards every method call to each of the supplied handler, in the order in which the handlers are supplied.

Parameters:

rdfHandlers - One or more wrapped RDF handlers for this RDFHandlerWrapper, must not be null.

RDFHandlerWrapper

public RDFHandlerWrapper(ModelFactory modelFactory,
                         RDFHandler... rdfHandlers)

Creates a new RDFHandlerWrapper that wraps the supplied RDF handler(s). If more than one RDFHandler is supplied for wrapping, the RDFHandlerWrapper forwards every method call to each of the supplied handlers, in the order in which the handlers are supplied.

Parameters:

modelFactory - a ModelFactory that can be used for creating new empty Models by the handler.

rdfHandlers - One or more wrapped RDF handlers for this RDFHandlerWrapper, must not be null.

Method Detail

startRDF

public void startRDF()
              throws RDFHandlerException

Description copied from interface: RDFHandler

Signals the start of the RDF data. This method is called before any data is reported.

Specified by:

startRDF in interface RDFHandler

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

endRDF

public void endRDF()
            throws RDFHandlerException

Description copied from interface: RDFHandler

Signals the end of the RDF data. This method is called when all data has been reported.

Specified by:

endRDF in interface RDFHandler

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

handleNamespace

public void handleNamespace(String prefix,
                            String uri)
                     throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a namespace declaration/definition. A namespace declaration associates a (short) prefix string with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix, are represented as empty strings.

Specified by:

handleNamespace in interface RDFHandler

Parameters:

prefix - The prefix for the namespace, or an empty string in case of a default namespace.

uri - The URI that the prefix maps to.

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

handleStatement

public void handleStatement(Statement st)
                     throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a statement.

Specified by:

handleStatement in interface RDFHandler

Parameters:

st - The statement.

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

handleComment

public void handleComment(String comment)
                   throws RDFHandlerException

Description copied from interface: RDFHandler

Handles a comment.

Specified by:

handleComment in interface RDFHandler

Parameters:

comment - The comment.

Throws:

RDFHandlerException - If the RDF handler has encountered an unrecoverable error.

getModelFactory

public ModelFactory getModelFactory()