001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.scan;
022    
023    import java.io.IOException;
024    import java.net.URL;
025    import java.net.URLClassLoader;
026    
027    /**
028     * @author Franck WOLFF
029     */
030    public class ScannedItemClassLoader extends URLClassLoader {
031    
032        public ScannedItemClassLoader(URLClassLoader parent) {
033            this(new URL[0], parent);
034        }
035    
036        public ScannedItemClassLoader(URL[] urls, URLClassLoader parent) {
037            super(urls, parent);
038        }
039    
040        public Class<?> loadClass(ScannedItem item) throws IOException, ClassFormatError {
041            String name = item.getClassName();
042    
043            Class<?> clazz = findLoadedClass(name);
044            if (clazz == null) {
045    
046                SecurityManager securityManager = System.getSecurityManager();
047                if (securityManager != null) {
048                    int iLastDot = name.lastIndexOf('.');
049                    if (iLastDot != -1)
050                        securityManager.checkPackageAccess(name.substring(0, iLastDot));
051                }
052    
053                byte[] data = item.getContent();
054                clazz = defineClass(name, data, 0, data.length);
055            }
056            return clazz;
057        }
058    }
059