org.openrdf.sesame.query
Class VarBindingRdfWriter

java.lang.Object
  org.openrdf.sesame.query.VarBindingRdfWriter

All Implemented Interfaces:

TableQueryResultListener

public class VarBindingRdfWriter

extends Object

implements TableQueryResultListener

A TableQueryResultListener that converts query results into an RDF document containing variable bindings. This format is based on the work done by Andy Seaborne. See http://www.w3.org/2003/03/rdfqr-tests/recording-query-results.html for a description of the results format.

Version:

$Revision: 1.9.4.2 $

Author:

Arjohn Kampman

Constructor Summary

VarBindingRdfWriter(OutputStream out)
Creates a new VarBindingRdfWriter.

VarBindingRdfWriter(RDFFormat rdfFormat, OutputStream out)

Method Summary

void	endTableQueryResult() Indicates the end of a table-like query result.
void	endTuple() Indicates the end of a tuple/row.
void	error(QueryErrorType errType, String msg) Reports an error that has occurred during the query evaluation.
void	startTableQueryResult() Indicates the start of a table-like query result.
void	startTableQueryResult(String[] columnHeaders) Indicates the start of a table-like query result.
void	startTuple() Indicates the start of a tuple/row.
void	tupleValue(Value value) Delivers the next value in the current tuple/row.

Methods inherited from class java.lang.Object

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

Constructor Detail

VarBindingRdfWriter

public VarBindingRdfWriter(OutputStream out)

Creates a new VarBindingRdfWriter.

VarBindingRdfWriter

public VarBindingRdfWriter(RDFFormat rdfFormat,
                           OutputStream out)

Method Detail

startTableQueryResult

public void startTableQueryResult()
                           throws IOException

Description copied from interface: TableQueryResultListener

Indicates the start of a table-like query result.

Specified by:

startTableQueryResult in interface TableQueryResultListener

Throws:

IOException

startTableQueryResult

public void startTableQueryResult(String[] columnHeaders)
                           throws IOException

Description copied from interface: TableQueryResultListener

Indicates the start of a table-like query result. The supplied columnHeaders are an indication of the values that are in a specific column. For example, a query select A, B from * .... could have column headers A and B.

Specified by:

startTableQueryResult in interface TableQueryResultListener

Throws:

IOException

endTableQueryResult

public void endTableQueryResult()
                         throws IOException

Description copied from interface: TableQueryResultListener

Indicates the end of a table-like query result.

Specified by:

endTableQueryResult in interface TableQueryResultListener

Throws:

IOException

startTuple

public void startTuple()
                throws IOException

Description copied from interface: TableQueryResultListener

Indicates the start of a tuple/row.

Specified by:

startTuple in interface TableQueryResultListener

Throws:

IOException

endTuple

public void endTuple()
              throws IOException

Description copied from interface: TableQueryResultListener

Indicates the end of a tuple/row.

Specified by:

endTuple in interface TableQueryResultListener

Throws:

IOException

tupleValue

public void tupleValue(Value value)
                throws IOException

Description copied from interface: TableQueryResultListener

Delivers the next value in the current tuple/row.

Specified by:

tupleValue in interface TableQueryResultListener

Parameters:

value - The next value in the current tuple/row.

Throws:

IOException

error

public void error(QueryErrorType errType,
                  String msg)
           throws IOException

Description copied from interface: TableQueryResultListener

Reports an error that has occurred during the query evaluation.

Specified by:

error in interface TableQueryResultListener

Parameters:

errType - The type of error.

msg - A message describing the error.

Throws:

IOException