com.meyling.principia.logic.rule
Class ElementaryEquivalence

java.lang.Object
  |
  +--com.meyling.principia.argument.AbstractArgument
        |
        +--com.meyling.principia.argument.AbstractArgumentList
              |
              +--com.meyling.principia.logic.rule.ElementaryEquivalence

All Implemented Interfaces:

Argument, Rule

public class ElementaryEquivalence

extends AbstractArgumentList

implements Argument, Rule

Implemention of using an elementary equivalence:

a => b b => a A(a) ---------

A(b)

Version:

$Revision 0.00.50$

Author:

Michael Meyling

Field Summary

private String	firstSentenceLabel reference to first sentence
private int	n proof line of to apply equivalence
private int	occurrence modify this occurence
private String	secondSentenceLabel reference to second sentence
private static Version	version minimum version required for using this rule

Fields inherited from class com.meyling.principia.argument.AbstractArgumentList

arguments

Constructor Summary

ElementaryEquivalence(Argument[] arguments)
Constructs an elementary equivalence rule by two sentence references and an occurence number.

Method Summary

(package private) static void	() Initialize version information.
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.
static void	checkDeclaration(Module module, RuleDeclaration declaration) Check this rule could be declared.
Argument	create(Argument[] arguments) Create a new Argument with given arguments.
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.
String	toString() Get the argument in String form.

Methods inherited from class com.meyling.principia.argument.AbstractArgumentList

copy, getArgument, getArgumentSize

Methods inherited from class com.meyling.principia.argument.AbstractArgument

containsPatternVariables, equals, getHighestNumber, getPatternVariables, getReplacementParents, getSearchParents, hashCode, matches, matches, replace, replace, replace, replaceMatches

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, registerNatives, wait, wait, wait

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

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

Field Detail

version

private static final Version version

minimum version required for using this rule

n

private final int n

proof line of to apply equivalence

firstSentenceLabel

private final String firstSentenceLabel

reference to first sentence

secondSentenceLabel

private final String secondSentenceLabel

reference to second sentence

occurrence

private final int occurrence

modify this occurence

Constructor Detail

ElementaryEquivalence

public ElementaryEquivalence(Argument[] arguments)
                      throws ArgumentException

Constructs an elementary equivalence rule by two sentence references and an occurence number.

Parameters:

arguments - proof line reference, sentence references and occurence

Throws:

ArgumentException - if there are not exactly four arguments or the first argument is no instance of Counter (>0) or the second and the third arguments are no instances of LinkLabel or the fourth argument is no instance of an Counter (>0)

Method Detail

static void ()

Initialize version information.

check

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

Check if proof could be extended with formula. This is true if formula is equivalent to the referenced sentence formula.

Specified by:

check in interface Rule

Parameters:

module - module

proofLines - proof lines

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

formula - formula to add

Throws:

ArgumentException - if formula is not equal to the formula referenced by this object or a version conflict occurs

checkDeclaration

public static final void checkDeclaration(Module module,
                                          RuleDeclaration declaration)
                                   throws ArgumentException

Check this rule could be declared.

Parameters:

module - the module context

declaration - the declaration that shall declare this rule

Throws:

IllegalArgumentException - if an programming error occured

ArgumentException - if declaration failed

extendWithout

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

Return proof lines that could replace the proof line position.

Specified by:

extendWithout in interface Rule

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

getProofLines

public int[] getProofLines()

Description copied from interface: Rule

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

Specified by:

getProofLines in interface Rule

Following copied from interface: com.meyling.principia.logic.rule.Rule

Returns:

numbers of involved proof lines

changeProofLines

public Rule changeProofLines(int[] mapping)

Description copied from interface: Rule

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

Specified by:

changeProofLines in interface Rule

Following copied from interface: com.meyling.principia.logic.rule.Rule

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 final Version getVersion()

Description copied from interface: Rule

Get version of this rule.

Specified by:

getVersion in interface Rule

Following copied from interface: com.meyling.principia.logic.rule.Rule

Returns:

rule version

create

public final Argument create(Argument[] arguments)
                      throws ArgumentException

Description copied from interface: Argument

Create a new Argument with given arguments.

Specified by:

create in interface Argument

Overrides:

create in class AbstractArgumentList

Following copied from interface: com.meyling.principia.argument.Argument

Parameters:

arguments - with these arguments the operator should be created

Returns:

new constructed Argument

Throws:

ArgumentException - if creation failed

toString

public final String toString()

Description copied from interface: Argument

Get the argument in String form.

Specified by:

toString in interface Argument

Overrides:

toString in class AbstractArgumentList

Following copied from interface: com.meyling.principia.argument.Argument

Returns:

readable formula