/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * its licensees as provided above.  However, if you add GPL Version 2 code
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package com.sun.enterprise.admin.common.domains.registry;

import java.io.IOException;


import java.lang.ClassNotFoundException;


import java.io.File;


class PersistentStore implements LockingStore
{

  PersistentStore(){
	state = new Unlocked(this);
  }
  
  public long lastModified(){
	return getStore().lastModified();
  }

  public Object readObject()  throws IOException, TimeoutException, ClassNotFoundException{
	return state.readObject();
  }

  public void writeObject(Object o)  throws IOException, TimeoutException, IllegalStateException{
	state.writeObject(o);
  }

  public void lock()  throws IOException, TimeoutException{
	state.lock();
  }

  public void unlock(){
	state.unlock();
  }

  void setState(LockingStore s){
	state = s;
  }

  LockingStore getState(){
	return state;
  }

  protected void finalize(){
	state.unlock();
  }
  
  File getLock() {
	return LOCK;
  }
  
  File getStore(){
	return STORE;
  }
	  // Location of the underlying storage
  private static File STORE;
  private static File LOCK;

  {
	STORE = new File(System.getProperty(CONFIG_ROOT), STORE_NAME);
	LOCK = new File(System.getProperty(CONFIG_ROOT), LOCK_NAME);
  }
  
  private LockingStore state;

  public static final String CONFIG_ROOT = "com.sun.aas.configRoot";
  public static final String STORE_NAME = "domains.bin";
  public static final String LOCK_NAME = "domains.lck";
  
}