Class CustomAggregateFunctionRegistry

java.lang.Object

org.eclipse.rdf4j.common.lang.service.ServiceRegistry<String, AggregateFunctionFactory>

org.eclipse.rdf4j.query.parser.sparql.aggregate.CustomAggregateFunctionRegistry

@Experimental
public class CustomAggregateFunctionRegistry
extends ServiceRegistry<String, AggregateFunctionFactory>

ServiceRegistry implementation that stores available custom aggregate functions that can be used during query evaluation.

Author:

Tomas Kovachev t.kovachev1996@gmail.com

Field Summary

Fields inherited from class ServiceRegistry

logger, services

Modifier and Type	Field	Description
protected final org.slf4j.Logger	logger
protected Map<String, AggregateFunctionFactory>	services

Constructor Summary

Constructors

Constructor	Description
CustomAggregateFunctionRegistry()

Method Summary

Modifier and Type	Method	Description
static CustomAggregateFunctionRegistry	getInstance()
protected String	getKey(AggregateFunctionFactory service)	Gets the key for the specified service.

Methods inherited from class ServiceRegistry

add, get, getAll, getKeys, has, remove

Modifier and Type	Method	Description
Optional<AggregateFunctionFactory>	add(AggregateFunctionFactory service)	Adds a service to the registry.
Optional<AggregateFunctionFactory>	get(String key)	Gets the service for the specified key, if any.
Collection<AggregateFunctionFactory>	getAll()	Gets all registered services.
Set<String>	getKeys()	Gets the set of registered keys.
boolean	has(String key)	Checks whether a service for the specified key is available.
void	remove(AggregateFunctionFactory service)	Removes a service from the registry.

Methods inherited from class Object

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

Constructor Details

CustomAggregateFunctionRegistry

public CustomAggregateFunctionRegistry()

Method Details

getInstance

public static CustomAggregateFunctionRegistry getInstance()

getKey

protected String getKey(AggregateFunctionFactory service)

Description copied from class: ServiceRegistry

Gets the key for the specified service.

Specified by:

getKey in class ServiceRegistry<String, AggregateFunctionFactory>

Parameters:

service - The service to get the key for.

Returns:

The key for the specified service.