InstrumentableClassLoader


1   /*
2    * The contents of this file are subject to the terms 
3    * of the Common Development and Distribution License 
4    * (the License).  You may not use this file except in
5    * compliance with the License.
6    * 
7    * You can obtain a copy of the license at 
8    * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9    * glassfish/bootstrap/legal/CDDLv1.0.txt.
10   * See the License for the specific language governing 
11   * permissions and limitations under the License.
12   * 
13   * When distributing Covered Code, include this CDDL 
14   * Header Notice in each file and include the License file 
15   * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
16   * If applicable, add the following below the CDDL Header, 
17   * with the fields enclosed by brackets [] replaced by
18   * you own identifying information: 
19   * "Portions Copyrighted [year] [name of copyright owner]"
20   * 
21   * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22   */
23  package com.sun.enterprise.loader;
24  
25  import javax.persistence.spi.ClassTransformer;
26  
27  /**
28   * This interface is implemented by the Container and
29   * provides persistence providers with the ability to perform 
30   * transformation of entity classes.
31   */
32  public interface InstrumentableClassLoader {
33  
34      /**
35       * Create and return a temporary loader with the same visibility 
36       * as this loader. The temporary loader may be used to load 
37       * resources or any other application classes for the purposes of
38       * introspecting them for annotations. The persistence provider 
39       * should not maintain any references to the temporary loader,
40       * or any objects loaded by it.
41       *
42       * @return A temporary classloader with the same classpath as this loader
43       */
44      public ClassLoader   copy();
45  
46      /**
47       * Registers the supplied transformer. All future class definitions
48       * loaded by this loader will be first passed to the transformer. 
49       *
50       * @param transformer The transformer to register with the loader
51       * @see java.lang.instrument.Instrumentation#addTransformer
52       */
53      public void addTransformer(ClassTransformer transformer);
54  }
55
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