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executable file 122 lines (109 sloc) 3.649 kb
<?php
/**
* @package sapphire
* @subpackage core
*/
/**
* Provides introspection information about the class tree.
* It's a cached wrapper around the built-in class functions. Sapphire uses class introspection heavily
* and without the caching it creates an unfortunate performance hit.
*
* @package sapphire
* @subpackage core
*/
class ClassInfo {
/**
* Returns true if the manifest has actually been built.
*/
static function ready() {
global $_ALL_CLASSES;
return $_ALL_CLASSES && $_ALL_CLASSES['hastable'];
}
static function allClasses() {
global $_ALL_CLASSES;
return $_ALL_CLASSES['exists'];
}
static function exists($class) {
global $_ALL_CLASSES;
return isset($_ALL_CLASSES['exists'][$class]) ? $_ALL_CLASSES['exists'][$class] : null;
}
static function hasTable($class) {
global $_ALL_CLASSES;
return isset($_ALL_CLASSES['hastable'][$class]) ? $_ALL_CLASSES['hastable'][$class] : null;
}
/**
* Returns the manifest of all classes which are present in the database.
*/
static function getValidSubClasses(){
// Get the enum of all page types from the SiteTree table
$classnameinfo = DB::query("DESCRIBE SiteTree ClassName")->first();
preg_match_all("/'[^,]+'/", $classnameinfo["Type"], $matches);
foreach($matches[0] as $value) {
$classes[] = trim($value, "'");
}
return $classes;
}
/**
* Return the database tables linked to this class.
* Gets an array of the current class, it subclasses and its ancestors. It then filters that list
* to those with DB tables
*/
static function dataClassesFor($class) {
global $_ALL_CLASSES;
if(!$_ALL_CLASSES['parents'][$class]) user_error("ClassInfo::dataClassesFor() no parents for $class", E_USER_WARNING);
foreach($_ALL_CLASSES['parents'][$class] as $subclass) {
if(isset($_ALL_CLASSES['hastable'][$subclass])){
$dataClasses[] = $subclass;
}
}
if(isset($_ALL_CLASSES['hastable'][$class])) $dataClasses[] = $class;
if(isset($_ALL_CLASSES['children'][$class]))
foreach($_ALL_CLASSES['children'][$class] as $subclass)
{
if(isset($_ALL_CLASSES['hastable'][$subclass]))
{
$dataClasses[] = $subclass;
}
}
return $dataClasses;
}
/**
* Return the root data class for that class.
* This root table has a lot of special use in the DataObject system.
*/
static function baseDataClass($class) {
global $_ALL_CLASSES;
reset($_ALL_CLASSES['parents'][$class]);
while($val = next($_ALL_CLASSES['parents'][$class])) {
if($val == 'DataObject') break;
}
$baseDataClass = next($_ALL_CLASSES['parents'][$class]);
return $baseDataClass ? $baseDataClass : $class;
}
static function subclassesFor($class){
global $_ALL_CLASSES;
$subclasses = isset($_ALL_CLASSES['children'][$class]) ? $_ALL_CLASSES['children'][$class] : null;
if(isset($subclasses)) array_unshift($subclasses, $class);
else $subclasses[$class] = $class;
return $subclasses;
}
static function ancestry($class, $onlyWithTables = false) {
global $_ALL_CLASSES;
if(!is_string($class)) $class = $class->class;
$items = $_ALL_CLASSES['parents'][$class];
$items[$class] = $class;
if($onlyWithTables) foreach($items as $item) {
if(!$_ALL_CLASSES['hastable'][$item]) unset($items[$item]);
}
return $items;
}
/**
* @return array A self-keyed array of class names. Note that this is only available with Silverstripe
* classes and not built-in PHP classes.
*/
static function implementorsOf($interfaceName) {
global $_ALL_CLASSES;
return (isset($_ALL_CLASSES['implementors'][$interfaceName])) ? $_ALL_CLASSES['implementors'][$interfaceName] : false;
}
}
?>
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