Package edu.cornell.mannlib.vitro.webapp.controller.api.sparqlquery

Class SparqlQueryApiAskExecutor

java.lang.Object

edu.cornell.mannlib.vitro.webapp.controller.api.sparqlquery.SparqlQueryApiExecutor

edu.cornell.mannlib.vitro.webapp.controller.api.sparqlquery.SparqlQueryApiAskExecutor

public class SparqlQueryApiAskExecutor
extends SparqlQueryApiExecutor

Process ASK queries.

Field Summary

Fields

Modifier and Type	Field	Description
protected ResultSetMediaType	mediaType

Fields inherited from class edu.cornell.mannlib.vitro.webapp.controller.api.sparqlquery.SparqlQueryApiExecutor

queryString, rdfService

Constructor Summary

Constructors

Constructor	Description
SparqlQueryApiAskExecutor(RDFService rdfService, String queryString, String acceptHeader)

Method Summary

Modifier and Type	Method	Description
void	executeAndFormat(OutputStream out)	Execute the query and write it to the output stream, in the selected format.
String	getMediaType()	What media type was selected, based on the Accept header?
protected InputStream	getRawResultStream()	The RDFService returns a boolean from an ASK query, without regard to a requested format.

Methods inherited from class edu.cornell.mannlib.vitro.webapp.controller.api.sparqlquery.SparqlQueryApiExecutor

instance

Methods inherited from class java.lang.Object

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

Field Detail

mediaType

protected final ResultSetMediaType mediaType

Constructor Detail

SparqlQueryApiAskExecutor

public SparqlQueryApiAskExecutor(RDFService rdfService,
                                 String queryString,
                                 String acceptHeader)
                          throws AcceptHeaderParsingException,
                                 NotAcceptableException

Throws:

AcceptHeaderParsingException

NotAcceptableException

Method Detail

getRawResultStream

protected InputStream getRawResultStream()
                                  throws RDFServiceException

The RDFService returns a boolean from an ASK query, without regard to a requested format. For TEXT, CSV and TSV, we can simple return the String value of the boolean as an InputStream. For XML and JSON, however, the W3C documents require something a bit more fancy.

Throws:

RDFServiceException

getMediaType

public String getMediaType()

Description copied from class: SparqlQueryApiExecutor

What media type was selected, based on the Accept header?

Specified by:

getMediaType in class SparqlQueryApiExecutor

executeAndFormat

public void executeAndFormat(OutputStream out)
                      throws RDFServiceException,
                             IOException

Description copied from class: SparqlQueryApiExecutor

Execute the query and write it to the output stream, in the selected format.

Specified by:

executeAndFormat in class SparqlQueryApiExecutor

Throws:

RDFServiceException

IOException