resources.java

模仿windows的扫雷游戏 SWT编写的 需要log4j 1.2.4

package cn.pandaoen.game.minesweeper.res;

import org.apache.log4j.Logger;

import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

/**
 * This class is conform to Singleton Pattern.
 * The singleton instance manage the resources.
 * It support caching.
 *  
 * @author pan
 */
public final class Resources {

	/**
	 * The single instance of this class
	 */
	public static final Resources res = new Resources();

	private Map<String, Image> imageCache = new HashMap<String, Image>();
	private Logger logger = Logger.getLogger(Resources.class);
	private ResourceBundle resources;
	private Locale[] locales = { Locale.ENGLISH, Locale.CHINESE, Locale.GERMAN };

	private static final String PREFIX = "cn/pandaoen/game/minesweeper/res/"; //$NON-NLS-1$

	public Image getImage(String imageName) {
		Image image = imageCache.get(imageName);
		if (image != null)
			return image;

		InputStream is = null;
		try {
			is = getResourceAsStream("images/" + imageName); //$NON-NLS-1$
			image = new Image(Display.getDefault(), is);
			imageCache.put(imageName, image);
		} catch (Exception e) {
			logger.warn(e.toString() + " " + imageName); //$NON-NLS-1$
		} finally {
			if (is != null)
				try {
					is.close();
				} catch (IOException e) {
					logger.warn(e.toString());
				}
		}
		return image;
	}

	public String getString(String key) {
		if (resources == null) {
			try {
				resources = ResourceBundle.getBundle(PREFIX + "minesweeper"); //$NON-NLS-1$
			} catch (Exception e) {
				logger.error(e);
			}
		}

		try {
			return resources.getString(key);
		} catch (MissingResourceException e) {
			logger.warn("String for " + key + "not found"); //$NON-NLS-1$//$NON-NLS-2$
			return key;
		}
	}

	public InputStream getResourceAsStream(String filename) {
		return Resources.class.getResourceAsStream(filename);
	}

	public URL getResourceAsURL(String filename) {
		return Resources.class.getResource(filename);
	}

	public void dispose() {
		logger.trace("Release images"); //$NON-NLS-1$
		for (Image image : imageCache.values()) {
			image.dispose();
		}
		imageCache = null;
	}

	public Locale[] getLocales() {
		return locales;
	}
}