/demos/helloorm/src/com/google/appengine/demos/helloorm/PersistenceStandard.java

 1// Copyright 2008 Google Inc. All Rights Reserved.
 2package com.google.appengine.demos.helloorm;
 3
 4/**
 5 * @author Max Ross <maxr@google.com>
 6 */
 7public enum PersistenceStandard {
 8
 9  JPA, JDO;
10
11  private static final String SYS_PROP = "helloorm.persistence.standard";
12
13  public static synchronized PersistenceStandard get() {
14    return PersistenceStandard.valueOf(System.getProperty(SYS_PROP));
15  }
16
17  public static synchronized void set(PersistenceStandard ps) {
18    System.setProperty(SYS_PROP, ps.name());
19  }
20
21  public PersistenceStandard getAlternate() {
22    return PersistenceStandard.values()[(this.ordinal() + 1) % 2];
23  }
24}