eu.fbk.rdfpro

Class RuleEngine

java.lang.Object

eu.fbk.rdfpro.RuleEngine

public abstract class RuleEngine
extends Object

Rule engine abstraction.

Implementation note: concrete rule engine implementations should extend this abstract class and implement one or both methods #doEval(QuadModel) and #doEval(RDFHandler).

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RuleEngine(Ruleset ruleset) Creates a new RuleEngine using the Ruleset specified.

Method Summary

Modifier and Type	Method and Description
static RuleEngine	create(Ruleset ruleset) Factory method for creating a new RuleEngine using the Ruleset specified.
protected void	doEval(Collection<org.openrdf.model.Statement> model) Internal method called by #eval(QuadModel).
protected org.openrdf.rio.RDFHandler	doEval(org.openrdf.rio.RDFHandler handler, boolean deduplicate) Internal method called by #eval(RDFHandler).
void	eval(Collection<org.openrdf.model.Statement> model) Evaluates rules on the QuadModel specified.
org.openrdf.rio.RDFHandler	eval(org.openrdf.rio.RDFHandler handler, boolean deduplicate) Evaluates rules in streaming mode, emitting resulting statements to the RDFHandler supplied.
Ruleset	getRuleset() Returns the ruleset applied by this engine

Methods inherited from class java.lang.Object

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

Constructor Detail

RuleEngine

protected RuleEngine(Ruleset ruleset)

Creates a new RuleEngine using the Ruleset specified. The ruleset must not contain unsafe rules.

Parameters:

ruleset - the ruleset, not null and without unsafe rules

Method Detail

create

public static RuleEngine create(Ruleset ruleset)

Factory method for creating a new RuleEngine using the Ruleset specified. The ruleset must not contain unsafe rules. The engine implementation instantiated is based on the value of configuration property rdfpro.rules.implementation, which contains the qualified name of a concrete class extending abstract class RuleEngine.

Parameters:

ruleset - the ruleset, not null and without unsafe rules

Returns:

the created rule engine

getRuleset

public final Ruleset getRuleset()

Returns the ruleset applied by this engine

Returns:

the ruleset

eval

public final void eval(Collection<org.openrdf.model.Statement> model)

Evaluates rules on the QuadModel specified.

Parameters:

model - the model the engine will operate on

eval

public final org.openrdf.rio.RDFHandler eval(org.openrdf.rio.RDFHandler handler,
                                             boolean deduplicate)

Evaluates rules in streaming mode, emitting resulting statements to the RDFHandler supplied.

Parameters:

handler - the handler where to emit resulting statements

deduplicate - true if the output should not contain duplicate statements

Returns:

an RDFHandler where input statements can be streamed into

doEval

protected void doEval(Collection<org.openrdf.model.Statement> model)

Internal method called by #eval(QuadModel). Its base implementation delegates to #doEval(RDFHandler).

Parameters:

model - the model to operate on

doEval

protected org.openrdf.rio.RDFHandler doEval(org.openrdf.rio.RDFHandler handler,
                                            boolean deduplicate)

Internal method called by #eval(RDFHandler). Its base implementation delegates to #doEval(QuadModel).

Parameters:

handler - the handler where to emit resulting statements

deduplicate - true if output should not contain duplicate statements

Returns:

an handler accepting input statements