EntityManagerGenerationStrategyResolver


1   /*
2    * The contents of this file are subject to the terms of the Common Development
3    * and Distribution License (the License). You may not use this file except in
4    * compliance with the License.
5    *
6    * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7    * or http://www.netbeans.org/cddl.txt.
8    *
9    * When distributing Covered Code, include this CDDL Header Notice in each file
10   * and include the License file at http://www.netbeans.org/cddl.txt.
11   * If applicable, add the following below the CDDL Header, with the fields
12   * enclosed by brackets [] replaced by your own identifying information:
13   * "Portions Copyrighted [year] [name of copyright owner]"
14   *
15   * The Original Software is NetBeans. The Initial Developer of the Original
16   * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17   * Microsystems, Inc. All Rights Reserved.
18   */
19  
20  package org.netbeans.modules.j2ee.persistence.spi.entitymanagergenerator;
21  
22  import org.netbeans.modules.j2ee.persistence.action.*;
23  import org.openide.filesystems.FileObject;
24  
25  /**
26   * This interface is meant to be implemented in projects where you 
27   * can invoke the Use Entity Manager action. The code needed for accessing an EntityManager
28   * depends on the context where it is needed, such as whether the target class
29   * is a managed class or not.
30   * 
31   * @author Erno Mononen
32   */
33  public interface EntityManagerGenerationStrategyResolver {
34      
35      /**
36       * Resolves a generation strategy for the given <code>target</code>.
37       * @param target the file object representing the java file that needs an
38       * EntityManager. 
39       * @return the class of the generation strategy or null if no appropriate strategy 
40       * could be resolved.
41       */ 
42      Class  <? extends EntityManagerGenerationStrategy> resolveStrategy(FileObject target);
43      
44  }
45

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