package org.newdawn.util;

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.URL;

/**
 * A simple wrapper around resource loading should anyone decide to change
 * their minds how this is meant to work in the future.
 * 
 * @author Kevin Glass
 */
public class ResourceLoader {

	/**
	 * Get a resource from the classpath based 
	 * 
	 * @param ref The reference to the resource to retrieve
	 * @return A stream from which the resource can be read
	 */
	public static InputStream getResourceAsStream(String ref) {
		InputStream in = ResourceLoader.class.getClassLoader().getResourceAsStream(ref);
		if (in == null) {
			Log.log("Resource not found: "+ref);
			System.exit(0);
		}
		
		return new BufferedInputStream(in);
	}
	
	/**
	 * Get a resource from the classpath based 
	 * 
	 * @param ref The reference to the resource to retrieve
	 * @return The URL the resource can be read from
	 */
	public static URL getResource(String ref) {
		URL in = ResourceLoader.class.getClassLoader().getResource(ref);
		
		if (in == null) {
			Log.log("Resource not found: "+ref);
			System.exit(0);
		}
		
		return in;
	}
}