Package net.sf.tweety.logics.rpcl.parser

Class RpclParser

java.lang.Object

net.sf.tweety.commons.Parser<RpclBeliefSet,RelationalProbabilisticConditional>

net.sf.tweety.logics.rpcl.parser.RpclParser

public class RpclParser
extends Parser<RpclBeliefSet,RelationalProbabilisticConditional>

This class implements a parser for relational probabilistic 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 ")" "[" PROB "]"
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 and PROB is a float in [0,1].

Author:

Matthias Thimm

Field Summary

Fields

Modifier and Type	Field	Description
private FolParser	folParser	For parsing FOL fragments.

Constructor Summary

Constructors

Constructor	Description
RpclParser()	Creates a new RPCL Parser

Method Summary

Modifier and Type	Method	Description
FolSignature	getSignature()	Returns the signature of this parser.
RpclBeliefSet	parseBeliefBase(java.io.Reader reader)	Parses the given reader into a belief base of the given type.
RelationalProbabilisticConditional	parseFormula(java.io.Reader reader)	Parses the given reader into a formula of the given type.

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

Field Detail

folParser

private FolParser folParser

For parsing FOL fragments.

Constructor Detail

RpclParser

public RpclParser()

Creates a new RPCL Parser

Method Detail

parseBeliefBase

public RpclBeliefSet parseBeliefBase(java.io.Reader reader)
                              throws java.io.IOException,
                                     ParserException

Description copied from class: Parser

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

Specified by:

parseBeliefBase in class Parser<RpclBeliefSet,RelationalProbabilisticConditional>

Parameters:

reader - a reader

Returns:

a belief base

Throws:

java.io.IOException - if some IO issue occurred.

ParserException - some parsing exceptions may be added here.

parseFormula

public RelationalProbabilisticConditional parseFormula(java.io.Reader reader)
                                                throws java.io.IOException,
                                                       ParserException

Description copied from class: Parser

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

Specified by:

parseFormula in class Parser<RpclBeliefSet,RelationalProbabilisticConditional>

Parameters:

reader - a reader

Returns:

a formula

Throws:

java.io.IOException - if some IO issue occurred.

ParserException - some parsing exceptions may be added here.

getSignature

public FolSignature getSignature()

Returns the signature of this parser.

Returns:

the signature of this parser.