com.bigdata.rdf.sparql.ast.hints

Class QueryHintRegistry

java.lang.Object

com.bigdata.rdf.sparql.ast.hints.QueryHintRegistry

public class QueryHintRegistry
extends Object

A factory which is used to register and resolve query hints. TODO Query hints for includeInferred, timeout/deadline, the "noJoinVarsLimit" at which we break an unconstrained hash join (see the IHashJoinUtility implementation classes).

Author:

Bryan Thompson

Constructor Summary

Constructors

Constructor and Description
QueryHintRegistry()

Method Summary

Methods

Modifier and Type	Method and Description
static void	add(IQueryHint<?> queryHint) Register an IQueryHint.
static IQueryHint<?>	get(String name) Return the IQueryHint under that name.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryHintRegistry

public QueryHintRegistry()

Method Detail

add

public static final void add(IQueryHint<?> queryHint)

Register an IQueryHint.

Parameters:

The - query hint.

Throws:

UnsupportedOperationException - if there is already a FunctionRegistry.Factory registered for that URI.

get

public static final IQueryHint<?> get(String name)

Return the IQueryHint under that name.

Parameters:

name - The name of the IQueryHint.

Returns:

The IQueryHint -or- null if there is none registered for that name.