com.bigdata.rdf.sparql.ast.eval

Class SampleServiceFactory

java.lang.Object

com.bigdata.rdf.sparql.ast.eval.AbstractServiceFactoryBase

com.bigdata.rdf.sparql.ast.eval.AbstractServiceFactory

com.bigdata.rdf.sparql.ast.eval.SampleServiceFactory

All Implemented Interfaces:

ServiceFactory

public class SampleServiceFactory
extends AbstractServiceFactory
implements ServiceFactory

A factory for a statement pattern sampling service. It accepts a group with a single triple pattern in it: service bd:sample { ?s rdf:type ex:Foo . # optional service params for the sample bd:serviceParam bd:sample.limit 200 . bd:serviceParam bd:sample.seed 0 . bd:serviceParam bd:sample.sampleType \"RANDOM\" . } The service params are optional and let you set parameters on the sample. This service will use the SampleIndex operator to take a random sample of tuples from an access path.

See Also:

SampleIndex}

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	SampleServiceFactory.SampleParams The service params for this service.

Field Summary

Fields

Modifier and Type	Field and Description
static org.openrdf.model.URI	SERVICE_KEY The URI service key.

Constructor Summary

Constructors

Constructor and Description
SampleServiceFactory()

Method Summary

Methods

Modifier and Type	Method and Description
BigdataServiceCall	create(ServiceCallCreateParams params, ServiceParams serviceParams) Implemented by subclasses - verify the group and create the service call.
BigdataNativeServiceOptions	getServiceOptions() Return options for the service end point.

Methods inherited from class com.bigdata.rdf.sparql.ast.eval.AbstractServiceFactory

create

Methods inherited from class com.bigdata.rdf.sparql.ast.eval.AbstractServiceFactoryBase

getDesiredBound, getRequiredBound

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.bigdata.rdf.sparql.ast.service.ServiceFactory

create, getDesiredBound, getRequiredBound

Field Detail

SERVICE_KEY

public static final org.openrdf.model.URI SERVICE_KEY

The URI service key.

Constructor Detail

SampleServiceFactory

public SampleServiceFactory()

Method Detail

getServiceOptions

public BigdataNativeServiceOptions getServiceOptions()

Description copied from interface: ServiceFactory

Return options for the service end point. Depending on the implementation, these options MAY be configurable.

Specified by:

getServiceOptions in interface ServiceFactory

create

public BigdataServiceCall create(ServiceCallCreateParams params,
                        ServiceParams serviceParams)

Description copied from class: AbstractServiceFactory

Implemented by subclasses - verify the group and create the service call.

Specified by:

create in class AbstractServiceFactory