/*
* Distributed as part of c3p0 v.0.9.1.1
*
* Copyright (C) 2005 Machinery For Change, Inc.
*
* Author: Steve Waldman <swaldman@mchange.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1, as
* published by the Free Software Foundation.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software; see the file LICENSE. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
package com.mchange.v2.holders;
import java.io.*;
import com.mchange.v2.ser.UnsupportedVersionException;
public final class ChangeNotifyingSynchronizedIntHolder implements ThreadSafeIntHolder, Serializable
{
transient int value;
transient boolean notify_all;
public ChangeNotifyingSynchronizedIntHolder( int value, boolean notify_all )
{
this.value = value;
this.notify_all = notify_all;
}
public ChangeNotifyingSynchronizedIntHolder()
{ this(0, true); }
public synchronized int getValue()
{ return value; }
public synchronized void setValue(int value)
{
if (value != this.value)
{
this.value = value;
doNotify();
}
}
public synchronized void increment()
{
++value;
doNotify();
}
public synchronized void decrement()
{
--value;
doNotify();
}
//must be called from a sync'ed block...
private void doNotify()
{
if (notify_all) this.notifyAll();
else this.notify();
}
//Serialization
static final long serialVersionUID = 1; //override to take control of versioning
private final static short VERSION = 0x0001;
private void writeObject(ObjectOutputStream out) throws IOException
{
out.writeShort(VERSION);
out.writeInt(value);
out.writeBoolean(notify_all);
}
private void readObject(ObjectInputStream in) throws IOException
{
short version = in.readShort();
switch (version)
{
case 0x0001:
this.value = in.readInt();
this.notify_all = in.readBoolean();
break;
default:
throw new UnsupportedVersionException(this, version);
}
}
}