Package dev.roanh.gmark.query.conjunct.cpq

Class ConjunctGeneratorCPQ

java.lang.Object

dev.roanh.gmark.query.conjunct.cpq.ConjunctGeneratorCPQ

All Implemented Interfaces:

ConjunctGenerator

public class ConjunctGeneratorCPQ
extends Object
implements ConjunctGenerator

Conjunct generator for CPQs (Conjunctive Path Queries).

See Also:

• CPQ

Field Summary

Fields

Modifier and Type	Field	Description
private SchemaGraph	gs	The schema graph to use to generate CPQs.
private WorkloadCPQ	workload	The workload specifying what CPQs to generate.

Constructor Summary

Constructors

Constructor	Description
ConjunctGeneratorCPQ(WorkloadCPQ wl)	Constructs a new CPQ conjunct 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

gs

private SchemaGraph gs

The schema graph to use to generate CPQs.

workload

private WorkloadCPQ workload

The workload specifying what CPQs to generate.

Constructor Details

ConjunctGeneratorCPQ

public ConjunctGeneratorCPQ(WorkloadCPQ wl)

Constructs a new CPQ conjunct generator using the given workload.

Parameters:

wl - The workload specification.

See Also:

• WorkloadCPQ

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.