Package org.apache.jena.sparql.engine

Class QueryEngineRegistry

java.lang.Object

org.apache.jena.sparql.engine.QueryEngineRegistry

public class QueryEngineRegistry
extends java.lang.Object

Method Summary

Modifier and Type	Method	Description
void	add(QueryEngineFactory f)	Add a QueryExecutionFactory
static void	addFactory(QueryEngineFactory f)	Add a QueryExecutionFactory to the default registry
boolean	contains(QueryEngineFactory f)	Check whether a query engine factory is already registered
static boolean	containsFactory(QueryEngineFactory f)	Check whether a query engine factory is already registered in the default registry
java.util.List<QueryEngineFactory>	factories()	Allow careful manipulation of the factories list
QueryEngineFactory	find(Query query, DatasetGraph dataset)	Locate a suitable factory for this query and dataset
QueryEngineFactory	find(Query query, DatasetGraph dataset, Context context)	Locate a suitable factory for this query and dataset
QueryEngineFactory	find(Op op, DatasetGraph dataset, Context context)	Locate a suitable factory for this algebra expression and dataset
static QueryEngineFactory	findFactory(Query query, DatasetGraph dataset, Context context)	Locate a suitable factory for this query and dataset from the default registry
static QueryEngineFactory	findFactory(Op op, DatasetGraph dataset, Context context)	Locate a suitable factory for this algebra expression and dataset from the default registry
static QueryEngineRegistry	get()
void	remove(QueryEngineFactory f)	Remove a QueryExecutionFactory
static void	removeFactory(QueryEngineFactory f)	Remove a QueryExecutionFactory

Methods inherited from class java.lang.Object

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

Method Detail

get

public static QueryEngineRegistry get()

findFactory

public static QueryEngineFactory findFactory(Query query,
                                             DatasetGraph dataset,
                                             Context context)

Locate a suitable factory for this query and dataset from the default registry

Parameters:

query - Query

dataset - Dataset

Returns:

A QueryExecutionFactory or null if none accept the request

findFactory

public static QueryEngineFactory findFactory(Op op,
                                             DatasetGraph dataset,
                                             Context context)

Locate a suitable factory for this algebra expression and dataset from the default registry

Parameters:

op - Algebra expression

dataset - DatasetGraph

context -

Returns:

A QueryExecutionFactory or null if none accept the request

find

public QueryEngineFactory find(Query query,
                               DatasetGraph dataset)

Locate a suitable factory for this query and dataset

Parameters:

query - Query

dataset - Dataset

Returns:

A QueryExecutionFactory or null if none accept the request

find

public QueryEngineFactory find(Query query,
                               DatasetGraph dataset,
                               Context context)

Locate a suitable factory for this query and dataset

Parameters:

query - Query

dataset - Dataset

Returns:

A QueryExecutionFactory or null if none accept the request

find

public QueryEngineFactory find(Op op,
                               DatasetGraph dataset,
                               Context context)

Locate a suitable factory for this algebra expression and dataset

Parameters:

op - Algebra expression

dataset - DatasetGraph

context -

Returns:

A QueryExecutionFactory or null if none accept the request

addFactory

public static void addFactory(QueryEngineFactory f)

Add a QueryExecutionFactory to the default registry

add

public void add(QueryEngineFactory f)

Add a QueryExecutionFactory

removeFactory

public static void removeFactory(QueryEngineFactory f)

Remove a QueryExecutionFactory

remove

public void remove(QueryEngineFactory f)

Remove a QueryExecutionFactory

factories

public java.util.List<QueryEngineFactory> factories()

Allow careful manipulation of the factories list

containsFactory

public static boolean containsFactory(QueryEngineFactory f)

Check whether a query engine factory is already registered in the default registry

contains

public boolean contains(QueryEngineFactory f)

Check whether a query engine factory is already registered