org.openrdf.rio

Interface RDFHandler

All Known Subinterfaces:

RDFWriter

All Known Implementing Classes:

BufferedGroupingRDFHandler, ContextStatementCollector, RDFHandlerBase, RDFHandlerWrapper, RDFWriterBase, StatementCollector

public interface RDFHandler

An interface defining methods related to RDF data handling. RDFHandler is both used as a "consumer" and as a "producer" interface. As such it can be used both as an interface for receiving RDF data, for example by listening to the results of an RDF parser, and as an interface for reporting RDF data, for example to an object that serializes RDF data to an RDF/XML document.

Method Summary

Methods

Modifier and Type	Method and Description
void	endRDF() Signals the end of the RDF data.
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.

Method Detail

startRDF

void startRDF()
              throws RDFHandlerException

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

Throws:

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

endRDF

void endRDF()
            throws RDFHandlerException

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

Throws:

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

handleNamespace

void handleNamespace(String prefix,
                   String uri)
                     throws RDFHandlerException

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.

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

void handleStatement(Statement st)
                     throws RDFHandlerException

Handles a statement.

Parameters:

st - The statement.

Throws:

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

handleComment

void handleComment(String comment)
                   throws RDFHandlerException

Handles a comment.

Parameters:

comment - The comment.

Throws:

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