com.meyling.principia.argument
Class PatternVariable

java.lang.Object
  com.meyling.principia.argument.AbstractArgument
      com.meyling.principia.argument.PatternVariable

All Implemented Interfaces:

Argument, Comparable, CounterMarker

Direct Known Subclasses:

BasicPatternVariable, BasicSubjectVariablePatternVariable

public class PatternVariable

extends AbstractArgument

implements CounterMarker, Comparable

Pattern variable, for matching purposes.

Version:

$Revision: 1.5 $

Author:

Michael Meyling

Constructor Summary

PatternVariable(Argument[] arguments)
Constructs a pattern variable.

Method Summary

int	compareTo(Object o)
boolean	containsPatternVariables() Does this argument contain any PatternVariable?
Argument	copy() Returns an identical object (maybe "this").
Argument	create(Argument[] arguments) Create a new Argument with given arguments.
Argument	getArgument(int i) Get the requested argument.
int	getArgumentSize() Get the number of arguments.
Argument	getContent() Sets argument of pattern variable.
int	getNumber() Get number of pattern variable.
boolean	isMatching(Argument argument) Is the argument matching the pattern variable?
void	setContent(Argument content) Sets argument of pattern variable.
String	toString() Get the argument in String form.

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

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

Methods inherited from class java.lang.Object

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

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

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

Constructor Detail

PatternVariable

public PatternVariable(Argument[] arguments)
                throws ArgumentException

Constructs a pattern variable.

Parameters:

arguments - first argument is number of this pattern variable

Throws:

ArgumentException - if there is not exactly one argument that is an instance of Counter

Method Detail

getArgumentSize

public final int getArgumentSize()

Description copied from interface: Argument

Get the number of arguments.

Specified by:

getArgumentSize in interface Argument

Specified by:

getArgumentSize in class AbstractArgument

getArgument

public final Argument getArgument(int i)
                           throws IllegalArgumentException

Description copied from interface: Argument

Get the requested argument.

Specified by:

getArgument in interface Argument

Specified by:

getArgument in class AbstractArgument

Throws:

IllegalArgumentException

copy

public Argument copy()

Description copied from interface: Argument

Returns an identical object (maybe "this").

Specified by:

copy in interface Argument

Returns:

copy of this object

setContent

public final void setContent(Argument content)

Sets argument of pattern variable.

Parameters:

content - assignment of pattern variable

Throws:

IllegalArgumentException - if there is already an assignment

getContent

public final Argument getContent()

Sets argument of pattern variable.

Returns:

argument assignment of pattern variable,

Throws:

IllegalArgumentException - if no value was assigned

getNumber

public final int getNumber()

Get number of pattern variable.

Specified by:

getNumber in interface CounterMarker

Returns:

number of pattern variable

containsPatternVariables

public final boolean containsPatternVariables()

Description copied from interface: Argument

Does this argument contain any PatternVariable?

Specified by:

containsPatternVariables in interface Argument

Overrides:

containsPatternVariables in class AbstractArgument

Returns:

always returns true

create

public Argument create(Argument[] arguments)
                throws ArgumentException

Description copied from interface: Argument

Create a new Argument with given arguments.

Specified by:

create in interface Argument

Specified by:

create in class AbstractArgument

Throws:

ArgumentException

isMatching

public boolean isMatching(Argument argument)

Is the argument matching the pattern variable? Here always true is returned.

Parameters:

argument - argument to match pattern variable

Returns:

true

compareTo

public int compareTo(Object o)

Specified by:

compareTo in interface Comparable

toString

public String toString()

Description copied from interface: Argument

Get the argument in String form.

Specified by:

toString in interface Argument

Specified by:

toString in class AbstractArgument