LevelsXMLLoader.java

package vooga.towerdefense.gameeditor.gameloader.xmlloaders;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.w3c.dom.Element;

import util.XMLTool;
import vooga.towerdefense.action.Action;
import vooga.towerdefense.model.GameMap;
import vooga.towerdefense.model.GameModel;
import vooga.towerdefense.model.Player;
import vooga.towerdefense.model.levels.Level;
import vooga.towerdefense.model.rules.Rule;

/**
 * This class is responsible for loading Level objects
 * from an XML file.
 * 
 * @author Erick Gonzalez
 */
public class LevelsXMLLoader {
    
    private static final String LEVELS_TAG = "levels";
    private static final String ACTIONS_TAG = "actions";
    private static final String RULES_TAG = "rules";
    
    private XMLTool myXMLTool;
    
    /**
     * 
     * @param xmlTool an XMLTool containing the xml document
     */
    public LevelsXMLLoader(XMLTool xmlTool) {
        myXMLTool = xmlTool;
    }
    
    /**
     * Loads a list of level objects.
     * 
     * @param model a game model
     * @param gameMap a game map
     * @param player a player object
     * @return a list of level objects
     */
    public List<Level> loadLevels(GameModel model, GameMap gameMap, Player player) {
        // TODO: Levels element needs to be passed in here
        Element levelsElement = myXMLTool.getElement(LEVELS_TAG);

        List<Level> levels = new ArrayList<Level>();
        
        List<Element> subElements = myXMLTool.getChildrenList(levelsElement);
        for (Element subElement : subElements) {
            levels.add(loadLevel(subElement, model, gameMap, player));
        }
        return levels;
    }
        
    private Level loadLevel(Element levelElement, GameModel model, GameMap gameMap, Player player) {
        RulesXMLLoader rulesLoader = new RulesXMLLoader(myXMLTool);
        ActionXMLLoader actionLoader = new ActionXMLLoader(myXMLTool);
        Map<String, Element> subElements = myXMLTool.getChildrenElementMap(levelElement);

        List<Rule> rules = rulesLoader.getRules(model, subElements.get(RULES_TAG));
        List<Action> actions = actionLoader.loadActions(subElements.get(ACTIONS_TAG), 
                                                        gameMap, player);
        return new Level(actions, rules);
    }
}