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
021package org.apache.directory.server.core.api.sp.java;
022
023
024import org.apache.directory.api.ldap.model.entry.Attribute;
025import org.apache.directory.api.ldap.model.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 */
033public class LdapJavaStoredProcClassLoader extends ClassLoader
034{
035    private Attribute javaByteCodeAttr;
036
037
038    public LdapJavaStoredProcClassLoader( Attribute javaByteCodeAttr )
039    {
040        // Critical call to super class constructor. Required for true plumbing of class loaders.
041        super( LdapJavaStoredProcClassLoader.class.getClassLoader() );
042
043        this.javaByteCodeAttr = javaByteCodeAttr;
044    }
045
046
047    /**
048     * {@inheritDoc}
049     */
050    @Override
051    public Class<?> findClass( String name ) throws ClassNotFoundException
052    {
053        byte[] classBytes;
054
055        try
056        {
057            classBytes = javaByteCodeAttr.getBytes();
058        }
059        catch ( LdapException e )
060        {
061            throw new ClassNotFoundException();
062        }
063
064        return defineClass( name, classBytes, 0, classBytes.length );
065    }
066}