001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    
021    package org.apache.directory.server.core.sp.java;
022    
023    
024    import org.apache.directory.shared.ldap.entry.EntryAttribute;
025    import org.apache.directory.shared.ldap.exception.LdapException;
026    
027    
028    /**
029     * A class loader that loads a class from an attribute.
030     * 
031     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
032     * @version $Rev$ $Date$
033     */
034    public class LdapJavaStoredProcClassLoader extends ClassLoader
035    {
036        private EntryAttribute javaByteCodeAttr;
037    
038    
039        public LdapJavaStoredProcClassLoader( EntryAttribute javaByteCodeAttr )
040        {
041            // Critical call to super class constructor. Required for true plumbing of class loaders.
042            super( LdapJavaStoredProcClassLoader.class.getClassLoader() );
043    
044            this.javaByteCodeAttr = javaByteCodeAttr;
045        }
046    
047    
048        public Class<?> findClass( String name ) throws ClassNotFoundException
049        {
050            byte[] classBytes;
051            
052            try
053            {
054                classBytes = javaByteCodeAttr.getBytes();
055            }
056            catch ( LdapException e )
057            {
058                throw new ClassNotFoundException();
059            }
060    
061            return defineClass( name, classBytes, 0, classBytes.length );
062        }
063    }