Instantiator


1   // $Id: Instantiator.java,v 1.5 2005/07/11 17:31:50 steveebersole Exp $
2   package org.hibernate.tuple;
3   
4   
5   import java.io.Serializable  ;
6   
7   /**
8    * Contract for implementors responsible for instantiating entity/component instances.
9    *
10   * @author Steve Ebersole
11   */
12  public interface Instantiator extends Serializable   {
13  
14      /**
15       * Perform the requested entity instantiation.
16       * <p/>
17       * This form is never called for component instantiation, only entity instantiation.
18       *
19       * @param id The id of the entity to be instantiated.
20       * @return An appropriately instantiated entity.
21       */
22      public Object   instantiate(Serializable   id);
23  
24      /**
25       * Perform the requested instantiation.
26       *
27       * @return The instantiated data structure. 
28       */
29      public Object   instantiate();
30  
31      /**
32       * Performs check to see if the given object is an instance of the entity
33       * or component which this Instantiator instantiates.
34       *
35       * @param object The object to be checked.
36       * @return True is the object does respresent an instance of the underlying
37       * entity/component.
38       */
39      public boolean isInstance(Object   object);
40  }
41

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