com.bigdata.rdf.sparql.ast.eval

Class SearchServiceFactory

java.lang.Object

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

com.bigdata.rdf.sparql.ast.eval.SearchServiceFactory

All Implemented Interfaces:

ServiceFactory

public class SearchServiceFactory
extends AbstractServiceFactoryBase

A factory for a search service. It accepts a group consisting of search magic predicates. See BD#SEARCH.

Version:

$Id$ TODO Add support for slicing the join using tools like CUTOFF (to limit the #of solutions) and specifying a RangeBOp (to impose the desired key range). CUTOFF and a single-threaded pipeline join can guarantee that we report out the top-N subjects in terms of the hit relevance. RangeBOp would work on a cluster. None of this is perfectly satisfactory.

Author:

Bryan Thompson

Constructor Summary

Constructors

Constructor and Description
SearchServiceFactory()

Method Summary

Methods

Modifier and Type	Method and Description
BigdataServiceCall	create(ServiceCallCreateParams params) Create a service invocation object.
BigdataNativeServiceOptions	getServiceOptions() Return options for the service end point.

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

Constructor Detail

SearchServiceFactory

public SearchServiceFactory()

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.

create

public BigdataServiceCall create(ServiceCallCreateParams params)

Description copied from interface: ServiceFactory

Create a service invocation object.

Parameters:

params - The pararameters, which are encapsulated by this interface.

Returns:

The object which can be used to evaluate the SERVICE clause.