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<?php
/**
* Base class for all objects where only one object should be created
*
* @version $Header$
*
* Copyright (c) 2004 bitweaver.org
* All Rights Reserved. See below for details and a complete list of authors.
* Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See http://www.gnu.org/copyleft/lesser.html for details
*
* Virtual base class (as much as one can have such things in PHP) for all
* derived tikiwiki classes that require database access.
*
* created 2004/8/15
*
* @author spider <spider@steelsun.com>
* @package kernel
*/
namespace Bitweaver;
/**
* required setup
*/
/**
* @package kernel
*/
abstract class BitSingleton extends BitBase implements BitCacheable {
protected static $singletons = null;
function __construct() {
parent::__construct();
}
public static function loadSingleton( $pVarName = null ) {
$class = static::getClass();
$split = explode('\\', $class);
$globalVarName = !empty( $pVarName ) ? $pVarName : ( isset($split[2]) ? 'g'.$split[2] : 'g'.$split[1] );
global $$globalVarName;
if( !($$globalVarName = static::loadFromCache( 'Singleton' )) ) {
$$globalVarName = new $class();
}
if(!isset(static::$singletons[$globalVarName])) {
static::$singletons[$globalVarName] = $$globalVarName;
global $gBitSmarty;
if( $gBitSmarty ) {
$gBitSmarty->assign( $globalVarName, $$globalVarName );
}
}
return static::$singletons[$globalVarName];
}
public function getCacheKey() {
return 'Singleton';
}
public static function isCacheableClass() {
return true;
}
public function isCacheableObject() {
return true;
}
}
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