content: /*
   * Persist.java July 2006
   *
   * Copyright (C) 2006, Niall Gallagher <niallg@users.sf.net>
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
   * implied. See the License for the specific language governing 
   * permissions and limitations under the License.
   */
  
  package com.aliyun.odps.simpleframework.xml.core;
  
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Retention;
  
  /**
   * The <code>Persist</code> annotation is used to mark a method that
   * requires a callback from the persister before serialization of
   * an object begins. If a method is marked with this annotation then
   * it will be invoked so that it can prepare the object for the
   * serialization process.
   * <p>
   * The persist method can be used to perform any preparation needed
   * before serialization. For example, should the object be a list
   * or table of sorts the persist method can be used to grab a lock
   * for the internal data structure. Such a scheme will ensure that
   * the object is serialized in a known state. The persist method
   * must be a no argument public method or a method that takes a 
   * single <code>Map</code> argument, it may throw an exception to 
   * terminate the serialization process if required.
   * 
   * @author Niall Gallagher
   * 
   * @see Complete
   */
  @Retention(RetentionPolicy.RUNTIME)
  public @interface Persist {
  }
  