001/*
002 * ModeShape (http://www.modeshape.org)
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *       http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.modeshape.common.util;
017
018import org.modeshape.common.logging.Logger;
019import java.net.MalformedURLException;
020import java.net.URL;
021import java.net.URLClassLoader;
022import java.util.List;
023
024/**
025 * Extension of a {@link URLClassLoader} which accepts a list of strings instead of urls, trying to convert each string to an
026 * url. If a string cannot be converted to a URL, it is discarded.
027 *
028 * @author Horia Chiorean
029 */
030public final class StringURLClassLoader extends URLClassLoader {
031
032    private static final Logger LOGGER = Logger.getLogger(StringURLClassLoader.class);
033
034    public StringURLClassLoader( List<String> urls ) {
035        super(new URL[0], null);
036        CheckArg.isNotNull(urls, "urls");
037        for (String url : urls) {
038            try {
039                super.addURL(new URL(url));
040            } catch (MalformedURLException e) {
041                LOGGER.debug("{0} is not a valid url ", url);
042            }
043        }
044    }
045}