com.meyling.principia.logic.basic
Class PropositionVariables

java.lang.Object
  com.meyling.principia.logic.basic.PropositionVariables

public class PropositionVariables

extends Object

Set of proposition variables.

Version:

$Revision: 1.5 $

Author:

Michael Meyling

Constructor Summary

PropositionVariables()
Construct an empty set of proposition variables.

PropositionVariables(PropositionVariable[] already)
Construct a new set of proposition variables with some initial entries.

PropositionVariables(PropositionVariables already)
Construct a new set of proposition variables with the same entires as the given one.

Method Summary

void	add(PropositionVariable variable) Add a proposition variable to the set.
void	addAll(PropositionVariables newOnes) Add all these proposition variables.
boolean	contains(PropositionVariable variable) Check if a certain proposition variable is already in the set.
boolean	contains(PropositionVariables variables) Does this object contain another set of proposition variables?
boolean	emptyIntersection(PropositionVariables variables) Does this object have an empty intersection with another set of proposition variables?
boolean	equals(PropositionVariables variables) Is this object equal to another one?
int	getHighestNumber() Get highest number of each entry.
int	getSize() Get number of elements in the set.
void	remove(PropositionVariable variable) Remove a proposition variable or a pattern variable from the set.
String	toString() Get a readable string representation of this object.

Methods inherited from class java.lang.Object

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

Constructor Detail

PropositionVariables

public PropositionVariables()

Construct an empty set of proposition variables.

PropositionVariables

public PropositionVariables(PropositionVariables already)

Construct a new set of proposition variables with the same entires as the given one.

Parameters:

already - these proposition variable entries should be added

PropositionVariables

public PropositionVariables(PropositionVariable[] already)

Construct a new set of proposition variables with some initial entries.

Parameters:

already - these proposition variable entries should be added

Method Detail

add

public final void add(PropositionVariable variable)

Add a proposition variable to the set.

Parameters:

variable - add this variable

contains

public final boolean contains(PropositionVariable variable)

Check if a certain proposition variable is already in the set.

Parameters:

variable - check for this variable

Returns:

is variable already there?

emptyIntersection

public final boolean emptyIntersection(PropositionVariables variables)

Does this object have an empty intersection with another set of proposition variables?

Parameters:

variables - to build intersection with

Returns:

is the intersection empty?

contains

public final boolean contains(PropositionVariables variables)

Does this object contain another set of proposition variables?

Parameters:

variables - check this set

Returns:

is variables a subset?

addAll

public final void addAll(PropositionVariables newOnes)

Add all these proposition variables.

Parameters:

newOnes - these should be added

getSize

public final int getSize()

Get number of elements in the set.

Returns:

element number of set

getHighestNumber

public final int getHighestNumber()

Get highest number of each entry.

Returns:

maxiumum of number value for all entries, if getSize() == 0 it returns -1

remove

public final void remove(PropositionVariable variable)

Remove a proposition variable or a pattern variable from the set.

Parameters:

variable - remove this one

toString

public final String toString()

Get a readable string representation of this object.

Returns:

description of this object

equals

public final boolean equals(PropositionVariables variables)

Is this object equal to another one?

Parameters:

variables - object to compare with

Returns:

do all their entries are equal?