toxgene.util.cdata.xmark.Birthdays Maven / Gradle / Ivy

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package toxgene.util.cdata.xmark;

import java.util.Random;

import toxgene.interfaces.ToXgeneCdataGenerator;


/**
 * This class implements a simple CDATA generator that produces
 * random birthdays in the format MM/DD/YYYY. 
 * 


 * This code is provided as part of ToXgene - (c) 2001 University of Toronto
 * and IBM Corporation.
 *
 * @author Denilson Barbosa
 * @version 1.0
 */
public class Birthdays implements ToXgeneCdataGenerator {
	private static Random pick;
	private static String result;

	/**
	 * Specifies a seed for the random generator so that repeated
	 * executions always produce the same content, if the same seed is
	 * provided.
	 *
	 * @param seed random seed to initialize the random generator
	 */
	public void setRandomSeed(int seed){
		pick = new Random(seed);
	}
	
	/**
	 * Generates random text whose length is determined by the parameter
	 * length. A value of -1 determines that a string of any length can
	 * be returned; a positive value means that a string must be
	 * truncated if necessary.
	 *
	 * @param length specifies the length of the CDATA value to be returned.
	 */
	public String getCdata(int length){
		result = String.format("%02d", pick.nextInt(12) + 1) + "/" +
				 String.format("%02d", pick.nextInt(31) + 1) + "/" +
				 String.valueOf(pick.nextInt(120) + 1900);
		
		//length == -1 means that the string should not be trimmed
		if (length == -1){
			return result;
		}

		if (result.length() > length)
			return result.substring(0,length);
		else
			return result;
	}
	
	//my own testing purposes:
	public static void main(String[] args) {
		System.out.println(generateBirthday());
	}
	
	public static String generateBirthday() {
		pick = new Random();
		result = String.format("%02d", pick.nextInt(12) + 1) + "/" +
				 String.format("%02d", pick.nextInt(31) + 1) + "/" +
				 String.valueOf(pick.nextInt(120) + 1900);
		return result;
	}
}