Block.java

package nl.tudelft.bw4t.server.model.blocks;

import java.awt.geom.Point2D;

import nl.tudelft.bw4t.map.BlockColor;
import nl.tudelft.bw4t.server.model.BW4TServerMap;
import nl.tudelft.bw4t.server.model.BoundedMoveableObject;
import nl.tudelft.bw4t.server.model.robots.AbstractRobot;
import repast.simphony.space.continuous.NdPoint;

/**
 * Represents a block in the environment that can be picked up by a
 * {@link AbstractRobot}.
 */
public class Block extends BoundedMoveableObject {

	/**
	 * size of the block.
	 */
	public static final int SIZE = 1;

	/**
	 * the color of the block.
	 */
	private final BlockColor colorId;

	/**
	 * by whom the block is being held.
	 */
	private AbstractRobot heldBy;

	/**
	 * the view of the of the block.
	 */
	private final nl.tudelft.bw4t.map.view.ViewBlock view;

	/**
	 * Creates a new block with the given color.
	 * 
	 * @param colorId
	 *            The color of the block
	 * @param context
	 *            The context in which the block will be present.
	 */
	public Block(BlockColor colorId, BW4TServerMap context) {
		super(context);
		this.colorId = colorId;
		setSize(SIZE, SIZE);
		this.view = new nl.tudelft.bw4t.map.view.ViewBlock(getId(),
				getColorId(), new Point2D.Double());
	}

	/**
	 * @return the character identifying the color of the block.
	 */
	public BlockColor getColorId() {
		return colorId;
	}

	@Override
	public NdPoint getLocation() {
		NdPoint p;
		if (heldBy != null) {
			p = heldBy.getLocation();
		} else {
			p = super.getLocation();
		}
		if (p != null) {
			this.view.setPosition(p.getX(), p.getY());
		}
		return p;
	}

	/**
	 * Returns the {@link AbstractRobot} that is holding this block if any.
	 * 
	 * @return bot
	 */
	public AbstractRobot getHeldBy() {
		return heldBy;
	}

	/**
	 * Sets the {@link AbstractRobot} that is holding this block.
	 * 
	 * @param heldBy
	 *            The Robot that is holding this Block, use null to release the
	 *            block.
	 */
	public void setHeldBy(AbstractRobot heldBy) {
		this.heldBy = heldBy;
	}

	/**
	 * Returns true if this block is not held by a {@link AbstractRobot}.
	 * 
	 * @return is free
	 */
	public boolean isFree() {
		return getHeldBy() == null;
	}

	/**
	 * gets the view of the block
	 * 
	 * @return view
	 */
	public nl.tudelft.bw4t.map.view.ViewBlock getView() {
		this.getLocation(); // FIXME this call has side effects.
		return this.view;
	}

}