BytecodePreprocessor


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  
24  /*
25   * BytecodePreprocessor.java
26   *
27   * Created on May 22, 2002, 4:54 PM
28   */
29  
30  package com.sun.appserv;
31  
32  import java.util.Hashtable  ;
33  
34  /** Third party tool vendors may implement this interface to provide code
35   * instrumentation to the application server.
36   */
37  public interface BytecodePreprocessor {
38      
39      /** Initialize the profiler instance.  This method should be called exactly 
40       * once before any calls to preprocess.
41       * @param parameters Initialization parameters.
42       * @return true if initialization succeeded.
43       */    
44      public boolean initialize(Hashtable   parameters);
45      
46      /** This function profiler-enables the given class.  This method should not 
47       * be called until the initialization method has completed.  It is thread-
48       * safe.
49       * @param classname The name of the class to process.  Used for efficient 
50       * filtering.
51       * @param classBytes Actual contents of class to process
52       * @return The instrumented class bytes.
53       */    
54      public byte[] preprocess(String   classname, byte[] classBytes);
55      
56  }
57
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