Package org.tweetyproject.logics.qbf.parser

Class QbfParser

java.lang.Object

org.tweetyproject.commons.Parser<PlBeliefSet,PlFormula>

org.tweetyproject.logics.pl.parser.PlParser

org.tweetyproject.logics.qbf.parser.QbfParser

public class QbfParser
extends PlParser

This class implements a parser for quantified boolean formulas. The BNF for a qbf belief set is given by (starting symbol is KB)

KB ::== VARDECLAR FORMULAS
VARDECLAR ::== "{" (VARIABLENAME ("," VARIABLENAME)*)? "}"
FORMULAS ::== FORMULA ( "\n" FORMULA )*
FORMULA ::== VARIABLENAME | "(" FORMULA ")" | FORMULA ">>" FORMULA | FORMULA "||" FORMULA | FORMULA "=>" FORMULA | FORMULA "<=>" FORMULA | "!" FORMULA | "+" | "-" | "forall" VARIABLENAME ":" "(" FORMULA ")" | "exists" VARIABLENAME ":" "(" FORMULA ")" |

VARIABLENAME is a sequence of characters excluding |,&,!,(,),=,<,> and whitespace characters.

Author:

Anna Gessler, Matthias Thimm

Constructor Summary

Constructors

Constructor	Description
QbfParser()	Default

Method Summary

Modifier and Type	Method	Description
PlBeliefSet	parseBeliefBase(Reader reader)	Parses the given reader into a belief base of the given type.
PlFormula	parseFormula(Reader reader)	Parses the given reader into a formula of the given type.

Methods inherited from class org.tweetyproject.commons.Parser

isNumeric, parseBeliefBase, parseBeliefBaseFromFile, parseFormula, parseFormulaFromFile, parseListOfBeliefBases, parseListOfBeliefBases, parseListOfBeliefBasesFromFile, parseListOfBeliefBasesFromFile

Methods inherited from class java.lang.Object

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

Constructor Details

QbfParser

public QbfParser()

Default

Method Details

parseBeliefBase

public PlBeliefSet parseBeliefBase(Reader reader)
                            throws ParserException

Description copied from class: Parser

Parses the given reader into a belief base of the given type.

Overrides:

parseBeliefBase in class PlParser

Parameters:

reader - a reader

Returns:

a belief base

Throws:

ParserException - some parsing exceptions may be added here.

parseFormula

public PlFormula parseFormula(Reader reader)
                       throws ParserException

Description copied from class: Parser

Parses the given reader into a formula of the given type.

Overrides:

parseFormula in class PlParser

Parameters:

reader - a reader

Returns:

a formula

Throws:

ParserException - some parsing exceptions may be added here.