LifeFormIterator.java

import java.util.Iterator;

class LifeFormIterator implements Iterator {

	/**
	 * 
	 */
	private final Playground playground;

	/**
	 * @param playground
	 */
	LifeFormIterator(Playground playground) {
		this.playground = playground;
	}

	private int currentX = 0;
	private int currentY = 0;
	
	public boolean hasNext() {
		return (currentX < this.playground.xSize) && (currentY < this.playground.ySize);
	}

	
	public LifeForm next() {
		LifeForm result = new LifeForm(currentX, currentY, this.playground.field[currentX][currentY], this.playground.getNeighbourhood(currentX, currentY));
		currentX++;
		if(currentX >= this.playground.xSize) {
			currentX = 0;
			currentY++;
			assert (currentY < this.playground.ySize);
		}
		return result;
	}

	public void remove() {
		throw new UnsupportedOperationException();
	}
	
}