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     */
022    package org.granite.scan;
023    
024    import java.io.IOException;
025    import java.net.URL;
026    import java.net.URLClassLoader;
027    
028    /**
029     * @author Franck WOLFF
030     */
031    public 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