package ro.pub.cs.pp.a51hadoop.algorithm.testing;

import ro.pub.cs.pp.a51hadoop.algorithm.HashReducer;
import ro.pub.cs.pp.a51hadoop.algorithm.ReducerGenerator;


/*
 * A generator for DigitReducer functors.
 *
 */
public class DigitReducerGenerator implements ReducerGenerator
{

	/*
	 * All logic implemented in the generate() method.
	 *
	 * This generator can be reused to generate many sets of
	 * objects as it does not hold any state information.
	 */
	public DigitReducerGenerator() { }

	/*
	 * Generate @length distinct Reducer functors
	 * @length - the number of Reducers to generate
	 * @param  - a parameter to be sent to the reducers
	 *
	 * @return an array of all Reducer objects created
	 */
	public HashReducer[] generate(int length, int param)
	{
		try
		{
			HashReducer[] r;

			r = new HashReducer[length];
			for (int i = 0; i < length; i++)
				r[i] = new DigitReducer(i, param);

			return r;
		}
		catch(Exception e)
		{
			/*
			 * Fallback to an empty list of reducers.
			 */
			return new HashReducer[0];
		}
	}
}