/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.tools;

import java.net.URL;

/** 
 *  ResourceSources can be added to the {@link Tools} class in order to allow resource loading
 *  for both the RapidMiner core and the plugin. Each plugin might add a new new resource source 
 *  indicating where the sources of the plugin can be found.
 *  
 *  Please note that a resource path is only allowed to contain '/' instead of using File.separator.
 *  This must be considered if a new prefix should be defined.
 *  
 *  @author Ingo Mierswa
 */
public class ResourceSource {

	private ClassLoader loader;

	private String prefix;

	public ResourceSource(ClassLoader loader) {
		this(loader, Tools.RESOURCE_PREFIX);
	}

	public ResourceSource(ClassLoader loader, String prefix) {
		this.loader = loader;
		this.prefix = prefix;
		if (!prefix.endsWith("/"))
			this.prefix = prefix + "/";
	}

	public URL getResource(String name) {
		return loader.getResource((prefix + name).trim());
	}

	@Override
	public String toString() {
		return loader + "(" + prefix + ")";
	}
}