Factory


1   /*
2    * Copyright 2002,2003 The Apache Software Foundation
3    *
4    *  Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   *  Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package net.sf.cglib.proxy;
18  
19  /**
20   * All enhanced instances returned by the {@link Enhancer} class implement this interface.
21   * Using this interface for new instances is faster than going through the <code>Enhancer</code>
22   * interface or using reflection. In addition, to intercept methods called during
23   * object construction you <b>must</b> use these methods instead of reflection.
24   * @author Juozas Baliuka <a HREF="mailto:baliuka@mwm.lt">baliuka@mwm.lt</a>
25   * @version $Id: Factory.java,v 1.13 2004/06/24 21:15:20 herbyderby Exp $
26   */
27  public interface Factory {
28      /**
29       * Creates new instance of the same type, using the no-arg constructor.
30       * The class of this object must have been created using a single Callback type.
31       * If multiple callbacks are required an exception will be thrown.
32       * @param callback the new interceptor to use
33       * @return new instance of the same type
34       */     
35      Object   newInstance(Callback callback);
36      
37      /**
38       * Creates new instance of the same type, using the no-arg constructor.
39       * @param callbacks the new callbacks(s) to use
40       * @return new instance of the same type
41       */     
42      Object   newInstance(Callback[] callbacks);
43  
44      /**
45       * Creates a new instance of the same type, using the constructor
46       * matching the given signature.
47       * @param types the constructor argument types
48       * @param args the constructor arguments
49       * @param callbacks the new interceptor(s) to use
50       * @return new instance of the same type
51       */
52      Object   newInstance(Class  [] types, Object  [] args, Callback[] callbacks);
53  
54      /**
55       * Return the <code>Callback</code> implementation at the specified index.
56       * @param index the callback index
57       * @return the callback implementation
58       */
59      Callback getCallback(int index);
60  
61      /**
62       * Set the callback for this object for the given type.
63       * @param index the callback index to replace
64       * @param callback the new callback
65       */
66      void setCallback(int index, Callback callback);
67  
68      /**
69       * Replace all of the callbacks for this object at once.
70       * @param callbacks the new callbacks(s) to use
71       */
72      void setCallbacks(Callback[] callbacks);
73  
74      /**
75       * Get the current set of callbacks for ths object.
76       * @return a new array instance
77       */     
78      Callback[] getCallbacks();
79  }
80
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