org.mmbase.util.transformers
Class RomanTransformer

java.lang.Object
  org.mmbase.util.transformers.StringTransformer
      org.mmbase.util.transformers.RomanTransformer

All Implemented Interfaces:

CharTransformer, Serializable, Transformer

public class RomanTransformer

extends StringTransformer

Static utilities to deal with roman numbers, and non static functions to transform strings representing decimal numbers to roman numbers and back.

Since:

MMBase-1.8

Version:

$Id: RomanTransformer.java,v 1.4 2005/11/01 23:36:02 michiel Exp $

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Field Summary

static int	C Constants for roman numbers
static int	D Constants for roman numbers
static int	I Constants for roman numbers
static int	L Constants for roman numbers
static int	M Constants for roman numbers
static Pattern	NUMERIC
static Pattern	ROMAN
static int	V Constants for roman numbers
static int	X Constants for roman numbers

Constructor Summary

RomanTransformer()

Method Summary

static String	decimalToRoman(int value) Converts int to roman number (if bigger than 0, smaller then 4000), other wise return the integer as a string.
static char	decimalToRomanDigit(int i) Converts an integer to one the letters of the roman number system, or ' ' if no such number.
static void	main(String[] argv) Just to test
static int	romanToDecimal(char r) Converts one of the letters from the roman number system to an int.
static int	romanToDecimal(String roman) Converts roman number to int.
String	toString()
String	transform(String r)
String	transformBack(String r)

Methods inherited from class org.mmbase.util.transformers.StringTransformer

transform, transform, transformBack, transformBack

Methods inherited from class java.lang.Object

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

Field Detail

NUMERIC

public static final Pattern NUMERIC

ROMAN

public static final Pattern ROMAN

I

public static final int I

Constants for roman numbers

See Also:

Constant Field Values

V

public static final int V

Constants for roman numbers

See Also:

Constant Field Values

X

public static final int X

Constants for roman numbers

See Also:

Constant Field Values

L

public static final int L

Constants for roman numbers

See Also:

Constant Field Values

C

public static final int C

Constants for roman numbers

See Also:

Constant Field Values

D

public static final int D

Constants for roman numbers

See Also:

Constant Field Values

M

public static final int M

Constants for roman numbers

See Also:

Constant Field Values

Constructor Detail

RomanTransformer

public RomanTransformer()

Method Detail

romanToDecimal

public static int romanToDecimal(char r)

Converts one of the letters from the roman number system to an int.

Returns:

0 if could not be converted

decimalToRomanDigit

public static char decimalToRomanDigit(int i)

Converts an integer to one the letters of the roman number system, or ' ' if no such number.

See Also:

decimalToRoman(int)

romanToDecimal

public static int romanToDecimal(String roman)

Converts roman number to int.

decimalToRoman

public static String decimalToRoman(int value)

Converts int to roman number (if bigger than 0, smaller then 4000), other wise return the integer as a string.

transform

public String transform(String r)

Specified by:

transform in interface CharTransformer

Specified by:

transform in class StringTransformer

transformBack

public String transformBack(String r)

Specified by:

transformBack in interface CharTransformer

Overrides:

transformBack in class StringTransformer

toString

public String toString()

main

public static void main(String[] argv)

Just to test