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

Class SparqlQueryApiExecutor

java.lang.Object

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

Direct Known Subclasses:

SparqlQueryApiAskExecutor, SparqlQueryApiConstructExecutor, SparqlQueryApiDescribeExecutor, SparqlQueryApiSelectExecutor

public abstract class SparqlQueryApiExecutor
extends Object

The base class for the SPARQL query API.

Field Summary

Fields

Modifier and Type	Field and Description
protected String	queryString
protected RDFService	rdfService

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SparqlQueryApiExecutor(RDFService rdfService, String queryString)

Method Summary

Modifier and Type	Method and Description
abstract void	executeAndFormat(OutputStream out) Execute the query and write it to the output stream, in the selected format.
abstract String	getMediaType() What media type was selected, based on the Accept header?
static SparqlQueryApiExecutor	instance(RDFService rdfService, String queryString, String acceptHeader) Get an instance that is appropriate to the query and the acceptable types.

Methods inherited from class java.lang.Object

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

Field Detail

rdfService

protected final RDFService rdfService

queryString

protected final String queryString

Constructor Detail

SparqlQueryApiExecutor

protected SparqlQueryApiExecutor(RDFService rdfService,
                                 String queryString)

Method Detail

instance

public static SparqlQueryApiExecutor instance(RDFService rdfService,
                                              String queryString,
                                              String acceptHeader)
                                       throws NotAcceptableException,
                                              org.apache.jena.query.QueryParseException,
                                              InvalidQueryTypeException,
                                              AcceptHeaderParsingException

Get an instance that is appropriate to the query and the acceptable types.

Throws:

AcceptHeaderParsingException - if the accept header was not in a valid format

NotAcceptableException - if the accept header did not contain a content type that is supported by the query

org.apache.jena.query.QueryParseException - if the query was not syntactically valid

InvalidQueryTypeException - if the query was not SELECT, ASK, CONSTRUCT, or DESCRIBE

getMediaType

public abstract String getMediaType()

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

executeAndFormat

public abstract void executeAndFormat(OutputStream out)
                               throws RDFServiceException,
                                      IOException

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

Throws:

RDFServiceException

IOException