net.sf.tweety.logics.rcl.parser

Class RclParser

java.lang.Object

net.sf.tweety.commons.Parser<RclBeliefSet>

net.sf.tweety.logics.rcl.parser.RclParser

public class RclParser
extends net.sf.tweety.commons.Parser<RclBeliefSet>

This class implements a parser for relational conditional logic. The BNF for a conditional knowledge base is given by (starting symbol is KB)

KB ::== SORTSDEC PREDDECS (CONDITIONAL "\n")*
SORTSDEC ::== ( SORTNAME "=" "{" (CONSTANTNAME ("," CONSTANTNAME)*)? "}" "\n" )*
PREDDECS ::== ( "type" "(" PREDICATENAME "(" (SORTNAME ("," SORTNAME)*)? ")" ")" "\n" )*
CONDITIONAL ::== "(" FORMULA ")" "[" PROB "]" | "(" FORMULA "|" FORMULA ")"
FORMULA ::== ATOM | "(" FORMULA ")" | FORMULA "&&" FORMULA | FORMULA "||" FORMULA | "!" FORMULA | "+" | "-"
ATOM ::== PREDICATENAME "(" (TERM ("," TERM)*)? ")"
TERM ::== VARIABLENAME | CONSTANTNAME

where SORTNAME, PREDICATENAME, CONSTANTNAME, and VARIABLENAME are sequences of
symbols from {a,...,z,A,...,Z,0,...,9} with a letter at the beginning.

Author:

Matthias Thimm

Constructor Summary

Constructors

Constructor and Description
RclParser() Creates a new RCL Parser

Method Summary

Modifier and Type	Method and Description
net.sf.tweety.logics.fol.syntax.FolSignature	getSignature() Returns the signature of this parser.
RclBeliefSet	parseBeliefBase(Reader reader)
RelationalConditional	parseFormula(Reader reader)

Methods inherited from class net.sf.tweety.commons.Parser

isNumeric, parseBeliefBase, parseBeliefBaseFromFile, parseFormula, parseFormulaFromFile

Methods inherited from class java.lang.Object

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

Constructor Detail

RclParser

public RclParser()

Creates a new RCL Parser

Method Detail

parseBeliefBase

public RclBeliefSet parseBeliefBase(Reader reader)
                             throws IOException,
                                    net.sf.tweety.commons.ParserException

Specified by:

parseBeliefBase in class net.sf.tweety.commons.Parser<RclBeliefSet>

Throws:

IOException

net.sf.tweety.commons.ParserException

parseFormula

public RelationalConditional parseFormula(Reader reader)
                                   throws IOException,
                                          net.sf.tweety.commons.ParserException

Specified by:

parseFormula in class net.sf.tweety.commons.Parser<RclBeliefSet>

Throws:

IOException

net.sf.tweety.commons.ParserException

getSignature

public net.sf.tweety.logics.fol.syntax.FolSignature getSignature()

Returns the signature of this parser.

Returns:

the signature of this parser.