001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.scan;
023
024import java.io.IOException;
025import java.net.URL;
026import java.net.URLClassLoader;
027
028/**
029 * @author Franck WOLFF
030 */
031public class ScannedItemClassLoader extends URLClassLoader {
032
033    public ScannedItemClassLoader(URLClassLoader parent) {
034        this(new URL[0], parent);
035    }
036
037    public ScannedItemClassLoader(URL[] urls, URLClassLoader parent) {
038        super(urls, parent);
039    }
040
041    public Class<?> loadClass(ScannedItem item) throws IOException, ClassFormatError {
042        String name = item.getClassName();
043
044        Class<?> clazz = findLoadedClass(name);
045        if (clazz == null) {
046
047            SecurityManager securityManager = System.getSecurityManager();
048            if (securityManager != null) {
049                int iLastDot = name.lastIndexOf('.');
050                if (iLastDot != -1)
051                    securityManager.checkPackageAccess(name.substring(0, iLastDot));
052            }
053
054            byte[] data = item.getContent();
055            clazz = defineClass(name, data, 0, data.length);
056        }
057        return clazz;
058    }
059}
060