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/*
* TIFFRational
*
* Copyright (c) 2001, 2002 Marco Schmidt.
* All rights reserved.
*/
package net.sourceforge.jiu.codecs.tiff;
/**
* Data class to store a TIFF rational number.
* A TIFF rational number is a fraction given by 32 bit integer numerator and denominator values.
* It is one of the data types used in TIFF tags ({@link TIFFTag}).
* For more information on TIFF's internals, see {@link TIFFCodec}, which lists a few links
* to TIFF specification documents.
* @author Marco Schmidt
*/
public class TIFFRational
{
private int numerator;
private int denominator;
/**
* Creates a TiffRational object from the arguments.
* @param numerator the numerator of the fraction stored in this object
* @param denominator the denominator of the fraction stored in this object
* @throws IllegalArgumentException if denominator is <code>0</code> (division by zero is not allowed)
*/
public TIFFRational(int numerator, int denominator)
{
if (denominator == 0)
{
throw new IllegalArgumentException("A zero denominator is not allowed.");
}
this.numerator = numerator;
this.denominator = denominator;
}
/**
* Returns the denominator value that was given to the constructor.
* @return denominator value
*/
public int getDenominator()
{
return denominator;
}
/**
* Returns the fraction as a <code>double</code> value.
* @return the fraction stored in this object
* @see #getAsFloat
*/
public double getAsDouble()
{
return (double)numerator / (double)denominator;
}
/**
* Returns the fraction as a <code>float</code> value.
* @return the fraction stored in this object
* @see #getAsDouble
*/
public float getAsFloat()
{
return (float)numerator / (float)denominator;
}
/**
* Returns the numerator value that was given to the constructor.
* @return numerator value
*/
public int getNumerator()
{
return numerator;
}
}
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