Grid.java

package com.drawbridge.vl;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import com.drawbridge.vl.blocks.Block;

/**
 * Represents the Visual Language grid model used in DrawBridge
 * 
 * @author Alistair Stead
 * 
 */
public class Grid implements Iterable<LinkedList<Block>>
{

	private List<LinkedList<Block>>	backingGrid	= new LinkedList<LinkedList<Block>>();

	public Grid() {

	}

	public synchronized LinkedList<Block> get(int index)
	{
		return backingGrid.get(index);
	}

	public synchronized Block get(int i, int j)
	{
		return backingGrid.get(i).get(j);
	}

	public synchronized int size()
	{
		return backingGrid.size();
	}

	public synchronized void add(LinkedList<Block> newLine)
	{
		backingGrid.add(newLine);
	}

	public synchronized Object[] toArray()
	{
		return backingGrid.toArray();
	}

	public synchronized Iterator<LinkedList<Block>> iterator()
	{
		return backingGrid.iterator();
	}

	public synchronized void clear()
	{
		backingGrid.clear();
	}

	public synchronized void set(int index, LinkedList<Block> line)
	{
		backingGrid.set(index, line);
	}

	@Override
	public synchronized String toString()
	{
		String result = "Size:" + backingGrid.size() + "\n";
		for (int i = 0; i < backingGrid.size(); i++) {
			result += "LineSize:" + backingGrid.get(i).size() + " ";
			for (int j = 0; j < backingGrid.get(i).size(); j++) {
				result += "[" + backingGrid.get(i).get(j).getClass().getSimpleName() + "] ";
			}
			result += "\n";
		}
		return result;
	}

}