modifiedpersistentstate.java

把java对象映射成数据库表中的一条记录

/*
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations under
 * the License.
 *
 * The Original Code is jRelationalFramework.
 *
 * The Initial Developer of the Original Code is is.com.
 * Portions created by is.com are Copyright (C) 2000 is.com.
 * All Rights Reserved.
 *
 * Contributor(s): Jonathan Carlson ([e-mail])
 * Contributor(s): ____________________________________
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License (the "GPL") or the GNU Lesser General
 * Public license (the "LGPL"), in which case the provisions of the GPL or
 * LGPL are applicable instead of those above.  If you wish to allow use of
 * your version of this file only under the terms of either the GPL or LGPL
 * and not to allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and replace them
 * with the notice and other provisions required by either the GPL or LGPL
 * License.  If you do not delete the provisions above, a recipient may use
 * your version of this file under either the MPL or GPL or LGPL License.
 *
 */
package com.is.jrf;


import java.io.Serializable;


/**
 * This state represents an object that is out-of-synch with the database.
 */
public class ModifiedPersistentState
    implements PersistentState, Serializable
  {

  static final long serialVersionUID = -652720002710029655L;

  public void markModifiedPersistentState(PersistentObject aPO)
    {
    // Nothing to do since we're already modified.
    }

  public void markNewPersistentState(PersistentObject aPO)
    {
    aPO.setPersistentState(PersistentState.NEW);
    }

  public void markCurrentPersistentState(PersistentObject aPO)
    {
    aPO.setPersistentState(PersistentState.CURRENT);
    }

  public void markDeadPersistentState(PersistentObject aPO)
    {
    aPO.setPersistentState(PersistentState.DEAD);
    }

  public boolean isModifiedPersistentState()
    {
    return true;
    }

  public boolean isNewPersistentState()
    {
    return false;
    }

  public boolean isCurrentPersistentState()
    {
    return false;
    }

  public boolean isDeadPersistentState()
    {
    return false;
    }

  public boolean equals(Object anObject)
    {
    return (anObject instanceof ModifiedPersistentState);
    }

  } // ModifiedPersistentState