Package dev.roanh.gmark.query.conjunct.rpq

Class ConjunctGeneratorRPQ

java.lang.Object

dev.roanh.gmark.query.conjunct.rpq.ConjunctGeneratorRPQ

All Implemented Interfaces:

ConjunctGenerator

public class ConjunctGeneratorRPQ
extends Object
implements ConjunctGenerator

Conjunct generator for RPQs (Regular Path Queries).

Field Summary

Fields

Modifier and Type	Field	Description
private WorkloadRPQ	workload	The workload specifying what RPQs to generate.

Constructor Summary

Constructors

Constructor	Description
ConjunctGeneratorRPQ(WorkloadRPQ wl)	Constructs a new RPQ generator using the given workload.

Method Summary

Modifier and Type	Method	Description
Conjunct	generateConjunct(SelectivityGraph gSel, SelectivityType start, SelectivityType end, Variable source, Variable target, boolean star)	Generates a single conjunct using the given selectivity graph and with the start of the conjunct being the given start selectivity type and the end of the conjunct the given end selectivity type.

Methods inherited from class java.lang.Object

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

Field Details

workload

private WorkloadRPQ workload

The workload specifying what RPQs to generate.

Constructor Details

ConjunctGeneratorRPQ

public ConjunctGeneratorRPQ(WorkloadRPQ wl)

Constructs a new RPQ generator using the given workload.

Parameters:

wl - The workload specification.

See Also:

• WorkloadRPQ

Method Details

generateConjunct

public Conjunct generateConjunct(SelectivityGraph gSel,
 SelectivityType start,
 SelectivityType end,
 Variable source,
 Variable target,
 boolean star)
                          throws GenerationException

Description copied from interface: ConjunctGenerator

Generates a single conjunct using the given selectivity graph and with the start of the conjunct being the given start selectivity type and the end of the conjunct the given end selectivity type.

Specified by:

generateConjunct in interface ConjunctGenerator

Parameters:

gSel - The selectivity graph to use (if required).

start - The starting selectivity type of the conjunct to generate.

end - The end selectivity type of the conjunct to generate.

source - The source variable of the conjunct.

target - The target variable of the conjunct.

star - True if the conjunct should have a Kleene star above it.

Returns:

The randomly generated conjunct.

Throws:

GenerationException - When some exception occurred that prevented a conjunct from begin generated.