silverstripe-framework/model/DataModel.php

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<?php
/**
* Representation of a DataModel - a collection of DataLists for each different data type.
*
* Usage:
*
* $model = new DataModel;
* $mainMenu = $model->SiteTree->where('"ParentID" = 0 AND "ShowInMenus" = 1');
*/
class DataModel {
protected static $inst;
/**
* Get the global DataModel.
*/
public static function inst() {
if(!self::$inst) self::$inst = new self;
return self::$inst;
}
/**
* Set the global DataModel, used when data is requested from static methods.
*/
public static function set_inst(DataModel $inst) {
self::$inst = $inst;
}
////////////////////////////////////////////////////////////////////////
protected $customDataLists = array();
public function __get($class) {
if(isset($this->customDataLists[$class])) {
return clone $this->customDataLists[$class];
} else {
$list = DataList::create($class);
$list->setDataModel($this);
return $list;
}
}
public function __set($class, $item) {
$item = clone $item;
$item->setDataModel($this);
$this->customDataLists[$class] = $item;
}
}