com.meyling.principia.logic.rule
Interface Rule

All Superinterfaces:

Argument

All Known Implementing Classes:

LeftAdditionImplication, Particularization, RenameBoundSubjectVariable, ReplacePropositionVariable, RightAddition, RightAdditionEquivalence, UseAbbreviation, SubstLine, Generalization, LeftAdditionEquivalence, ConjunctionRule, RenameFreeSubjectVariable, RightAdditionConjunction, ReplacePredicateVariable, ReverseImplication, AddSentence, AddAxiom, ApplySentence, ModusPonens, ApplyAxiom, HypotheticalSyllogism, LeftAdditionConjunction, ReverseAbbreviation, RightAdditionImplication, LeftAddition, ElementaryEquivalence

public interface Rule

extends Argument

Every logical rule must implement this interface. Each rule makes it possible to extend a proof.

Version:

$Revision 0.00.50$

Author:

Michael Meyling

Method Summary

Rule	changeProofLines(int[] mapping) Get proof line numbers that are used to derive the new formula.
void	check(Module module, ProofLineList proofLines, int position, Formula formula) Check if proof could be extended with formula (using the arguments of rule).
ProofLineList	extendWithout(Module module, ProofLineList proofLines, int position) Return proof lines that could replace the proof line position.
int[]	getProofLines() Get proof line numbers that are used to derive the new formula.
Version	getVersion() Get version of this rule.

Methods inherited from interface com.meyling.principia.argument.Argument

containsPatternVariables, copy, create, equals, getArgument, getArgumentSize, getPatternVariables, getReplacementParents, getSearchParents, hashCode, matches, matches, replace, replace, replace, replaceMatches, toString

Method Detail

check

public void check(Module module,
                  ProofLineList proofLines,
                  int position,
                  Formula formula)
           throws ArgumentException

Check if proof could be extended with formula (using the arguments of rule).

Parameters:

module - the module context

proofLines - the proof lines

position - number of proof lines that could be used in the rule

formula - formula to add

Throws:

ArgumentException - if addition is not possible

extendWithout

public ProofLineList extendWithout(Module module,
                                   ProofLineList proofLines,
                                   int position)
                            throws IllegalArgumentException

Return proof lines that could replace the proof line position.

Parameters:

module - the belonging module

proofLines - proof lines

position - referenced proof line (starting with 0) in proofLines

Returns:

proof lines that could substitute the single proof line position

Throws:

IllegalArgumentException - if extension is impossible or other problems occured if the module was checked before, this exception could only occur if there is an programming error

UnsupportedOperationException - if this rule couldn't be reduced at all because it is a basic rule

getProofLines

public int[] getProofLines()

Get proof line numbers that are used to derive the new formula.

Returns:

numbers of involved proof lines

changeProofLines

public Rule changeProofLines(int[] mapping)

Get proof line numbers that are used to derive the new formula.

Parameters:

mapping - array that maps old proof line numbers (index) to new ones (value)

Returns:

same rule but with changed numbers of involved proof lines

Throws:

IllegalArgumentException - if a needed value is -1

getVersion

public Version getVersion()

Get version of this rule.

Returns:

rule version