org.wikidata.query.rdf.blazegraph.categories

Class CategoriesStoredQuery

java.lang.Object

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

com.bigdata.rdf.sparql.ast.service.storedquery.StoredQueryService

com.bigdata.rdf.sparql.ast.service.storedquery.SimpleStoredQueryService

org.wikidata.query.rdf.blazegraph.categories.CategoriesStoredQuery

All Implemented Interfaces:

com.bigdata.rdf.sparql.ast.service.ServiceFactory

public class CategoriesStoredQuery
extends com.bigdata.rdf.sparql.ast.service.storedquery.SimpleStoredQueryService

Stored query for categories:

 
 SELECT ?out ?depth WHERE {
  SERVICE mediawiki:categoryTree {
      bd:serviceParam mediawiki:start <https://en.wikipedia.org/wiki/Category:Ducks> .
      bd:serviceParam mediawiki:direction "Reverse" .
      bd:serviceParam mediawiki:depth 5 .
  }
 } ORDER BY ASC(?depth)
 
 

Directions are: - Forward: get parent category tree - Reverse: get subcategory tree - Undirected: both directions

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.rdf.sparql.ast.service.storedquery.StoredQueryService

com.bigdata.rdf.sparql.ast.service.storedquery.StoredQueryService.Options

Field Summary

Fields

Modifier and Type	Field and Description
static org.openrdf.model.URI	DEPTH_PARAM max depth parameter.
static org.openrdf.model.URI	DIRECTION_PARAM direction parameter.
static int	MAX_DEPTH Default max depth.
static org.openrdf.model.URI	SERVICE_KEY The URI service key.
static org.openrdf.model.URI	START_PARAM start parameter.

Constructor Summary

Constructors

Constructor and Description
CategoriesStoredQuery()

Method Summary

Modifier and Type	Method and Description
protected String	getQuery(com.bigdata.rdf.sparql.ast.service.ServiceCallCreateParams createParams, com.bigdata.rdf.sparql.ast.eval.ServiceParams serviceParams)
static void	register() Register the service so it is recognized by Blazegraph.

Methods inherited from class com.bigdata.rdf.sparql.ast.service.storedquery.SimpleStoredQueryService

doQuery

Methods inherited from class com.bigdata.rdf.sparql.ast.service.storedquery.StoredQueryService

create, create, getServiceOptions

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

Field Detail

SERVICE_KEY

public static final org.openrdf.model.URI SERVICE_KEY

The URI service key.

START_PARAM

public static final org.openrdf.model.URI START_PARAM

start parameter.

DIRECTION_PARAM

public static final org.openrdf.model.URI DIRECTION_PARAM

direction parameter.

DEPTH_PARAM

public static final org.openrdf.model.URI DEPTH_PARAM

max depth parameter.

MAX_DEPTH

public static final int MAX_DEPTH

Default max depth.

See Also:

Constant Field Values

Constructor Detail

CategoriesStoredQuery

public CategoriesStoredQuery()

Method Detail

register

public static void register()

Register the service so it is recognized by Blazegraph.

getQuery

protected String getQuery(com.bigdata.rdf.sparql.ast.service.ServiceCallCreateParams createParams,
                          com.bigdata.rdf.sparql.ast.eval.ServiceParams serviceParams)

Specified by:

getQuery in class com.bigdata.rdf.sparql.ast.service.storedquery.SimpleStoredQueryService