ClassLoaderStrategy


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   * ClassLoaderStrategy.java
26   *
27   * Created on August 29, 2003, 3:19 PM
28   */
29  
30  package com.sun.jdo.api.persistence.model;
31  
32  /**
33   *
34   * @author mvatkina
35   * @version %I%
36   */
37  public class ClassLoaderStrategy
38  {
39      /** System property key used to define the model behavior concerning
40       * multiple class loaders. 
41       * Value should be one of 
42       * {@link #MULTIPLE_CLASS_LOADERS_IGNORE},
43       * {@link #MULTIPLE_CLASS_LOADERS_RELOAD}, or 
44       * {@link #MULTIPLE_CLASS_LOADERS_ERROR}
45       */
46      public static final String   PROPERTY_MULTIPLE_CLASS_LOADERS =
47          "com.sun.jdo.api.persistence.model.multipleClassLoaders"; //NOI18N
48      
49      /** Constant representing the value "ignore" of the System property
50       * com.sun.jdo.api.persistence.model.multipleClassLoaders
51       * Setting the system property to "ignore" causes the model to ignore
52       * any new class loader for the same fully qualified class name.
53       * @see RuntimeModel#findClassLoader
54       */
55      public static final String   MULTIPLE_CLASS_LOADERS_IGNORE = "ignore"; //NOI18N
56  
57      /** Constant representing the value "reload" of the System property
58       * com.sun.jdo.api.persistence.model.multipleClassLoaders 
59       * Setting the system property to "reload" causes the model to reload 
60       * the class mapping if it is specified with a new class loader.
61       * @see RuntimeModel#findClassLoader
62       */
63      public static final String   MULTIPLE_CLASS_LOADERS_RELOAD = "reload"; //NOI18N
64  
65      /** Constant representing the value "error" of the System property
66       * com.sun.jdo.api.persistence.model.multipleClassLoaders
67       * Setting the system property to "reload" causes the model to throw an
68       * exception if the same class is used with a diferent class loader.
69       * @see RuntimeModel#findClassLoader
70       */
71      public static final String   MULTIPLE_CLASS_LOADERS_ERROR = "error"; //NOI18N
72  
73      /** Value of the property used to define the model behavior concerning
74       * multiple class loaders.
75       */
76      private static String   _strategy = System.getProperty(
77          PROPERTY_MULTIPLE_CLASS_LOADERS, MULTIPLE_CLASS_LOADERS_ERROR);
78  
79      /** Get the value of the property 
80       * {@link #PROPERTY_MULTIPLE_CLASS_LOADER} used to define the model 
81       * behavior concerning multiple class loaders.
82       * @return the value of the property, one of
83       * {@link #MULTIPLE_CLASS_LOADERS_IGNORE},
84       * {@link #MULTIPLE_CLASS_LOADERS_RELOAD}, or
85       * {@link #MULTIPLE_CLASS_LOADERS_ERROR}
86       */
87      public static String   getStrategy ()
88      {
89          return _strategy;
90      }
91  
92      /** Sets the value of the property 
93       * {@link #PROPERTY_MULTIPLE_CLASS_LOADER} used to define the model 
94       * behavior concerning multiple class loaders.
95       * @param strategy the new value of the property. Value should be one of
96       * {@link #MULTIPLE_CLASS_LOADERS_IGNORE},
97       * {@link #MULTIPLE_CLASS_LOADERS_RELOAD}, or
98       * {@link #MULTIPLE_CLASS_LOADERS_ERROR}
99       * @see RuntimeModel#findClassLoader
100      */
101     public static void setStrategy (String   strategy)
102     {
103         _strategy = strategy;
104     }
105 
106 }
107
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