Factory


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54  
55  package org.logicalcobwebs.cglib.proxy;
56  
57  /**
58   * All enhanced instances returned by the {@link Enhancer} class implement this interface.
59   * Using this interface for new instances is faster than going through the <code>Enhancer</code>
60   * interface or using reflection. In addition, to intercept methods called during
61   * object construction you <b>must</b> use these methods instead of reflection.
62   * @author Juozas Baliuka <a HREF="mailto:baliuka@mwm.lt">baliuka@mwm.lt</a>
63   * @version $Id: Factory.java,v 1.1 2003/12/12 19:28:11 billhorsman Exp $
64   */
65  public interface Factory {
66      /**
67       * Creates new instance of the same type, using the no-arg
68       * contructor, and copying the callbacks from the existing instance.
69       * @return new instance of the same type
70       */     
71      Object   newInstance();
72  
73      /**
74       * Creates new instance of the same type, using the no-arg constructor.
75       * The class of this object must have been created using a single Callback type.
76       * If multiple callbacks are required an exception will be thrown.
77       * @param callback the new interceptor to use
78       * @return new instance of the same type
79       */     
80      Object   newInstance(Callback callback);
81      
82      /**
83       * Creates new instance of the same type, using the no-arg constructor.
84       * @param callbacks the new callbacks(s) to use
85       * @return new instance of the same type
86       */     
87      Object   newInstance(Callback[] callbacks);
88  
89      /**
90       * Creates a new instance of the same type, using the constructor
91       * matching the given signature, and copying the callbacks
92       * from the existing instance.
93       * @param types the constructor argument types
94       * @param args the constructor arguments
95       * @return new instance of the same type
96       */     
97      Object   newInstance(Class  [] type, Object  [] args);
98  
99      /**
100      * Creates a new instance of the same type, using the constructor
101      * matching the given signature.
102      * @param types the constructor argument types
103      * @param args the constructor arguments
104      * @param callbacks the new interceptor(s) to use
105      * @return new instance of the same type
106      */
107     Object   newInstance(Class  [] types, Object  [] args, Callback[] callbacks);
108 
109     /**
110      * Return the <code>Callback</code> implementation at the specified index.
111      * @param index the callback index
112      * @return the callback implementation
113      */
114     Callback getCallback(int index);
115 
116     /**
117      * Set the callback for this object for the given type.
118      * @param index the callback index to replace
119      * @param callback the new callback
120      */
121     void setCallback(int index, Callback callback);
122 
123     /**
124      * Replace all of the callbacks for this object at once.
125      * @param callbacks the new callbacks(s) to use
126      */
127     void setCallbacks(Callback[] callbacks);
128 }
129
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