mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-31 06:48:02 +02:00
svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.2.1 ........ r46139 | aoneil | 2007-12-03 11:28:34 +1300 (Mon, 03 Dec 2007) | 2 lines #1942 - Object::uninherited() fix for PHP 5.1.2 ........ git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@46814 467b73ca-7a2a-4603-9d3b-597d59a354a9
434 lines
15 KiB
PHP
Executable File
434 lines
15 KiB
PHP
Executable File
<?php
|
|
/**
|
|
* Base object that all others should inherit from.
|
|
* This object provides a number of helper methods that patch over PHP's deficiencies.
|
|
*/
|
|
|
|
class Object {
|
|
/**
|
|
* This DataObjects extensions, eg Versioned.
|
|
* @var array
|
|
*/
|
|
protected $extension_instances = array();
|
|
|
|
/**
|
|
* Extensions to be used on this object. An array of extension names
|
|
* and parameters eg:
|
|
*
|
|
* static $extensions = array(
|
|
* "Hierarchy",
|
|
* "Versioned('Stage', 'Live')",
|
|
* );
|
|
*
|
|
* @var array
|
|
*/
|
|
public static $extensions = null;
|
|
|
|
protected static $extraStatics = array();
|
|
protected static $classConstructed = array();
|
|
|
|
protected static $extraMethods = array();
|
|
protected static $builtInMethods = array();
|
|
|
|
/**
|
|
* Use the class in the value instead of the class in the key
|
|
*/
|
|
private static $custom_classes = array();
|
|
private static $strong_classes = array();
|
|
|
|
|
|
|
|
/**
|
|
* This function allows you to overload class creation methods, so certain classes are
|
|
* always created correctly over your system.
|
|
*
|
|
* @param oldClass = the old classname you want to replace with.
|
|
* @param customClass = the new Classname you wish to replace the old class with.
|
|
* @param strong - If you want to force a replacement of a class then we use a different array
|
|
* e.g for use in singleton classes.
|
|
*/
|
|
public static function useCustomClass( $oldClass, $customClass,$strong = false ) {
|
|
if($strong){
|
|
self::$strong_classes[$oldClass] = $customClass;
|
|
}else{
|
|
self::$custom_classes[$oldClass] = $customClass;
|
|
}
|
|
}
|
|
|
|
public static function getCustomClass( $oldClass ) {
|
|
if( array_key_exists($oldClass, self::$custom_classes) )
|
|
return self::$custom_classes[$oldClass];
|
|
else{
|
|
return $oldClass;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create allows us to override the standard classes of sapphire with our own custom classes.
|
|
* create will load strong classes firstly for singleton level and database interaction, otherwise will
|
|
* use the fallback custom classes.
|
|
* To set a strong custom class to overide an object at for say singleton use, use the syntax
|
|
* Object::useCustomClass('Datetime','SSDatetime',true);
|
|
* @param className - The classname you want to create
|
|
* @param args - Up to 9 arguments you wish to pass on to the new class
|
|
*/
|
|
public static function create( $className, $arg0 = null, $arg1 = null, $arg2 = null, $arg3 = null, $arg4 = null, $arg5 = null, $arg6 = null, $arg7 = null, $arg8 = null ) {
|
|
|
|
$useStrongClassName = isset(self::$strong_classes[$className]);
|
|
$useClassName = isset(self::$custom_classes[$className]);
|
|
|
|
if($useStrongClassName){
|
|
$classToCreate = self::$strong_classes[$className];
|
|
}elseif($useClassName){
|
|
$classToCreate = self::$custom_classes[$className];
|
|
}
|
|
|
|
$hasStrong = isset(self::$strong_classes[$className]) && class_exists(self::$strong_classes[$className]);
|
|
$hasNormal = isset(self::$custom_classes[$className]) && class_exists(self::$custom_classes[$className]);
|
|
|
|
if( !isset($classToCreate) || (!$hasStrong && !$hasNormal)){
|
|
$classToCreate = $className;
|
|
}
|
|
return new $classToCreate( $arg0, $arg1, $arg2, $arg3, $arg4, $arg5, $arg6, $arg7, $arg8 );
|
|
}
|
|
|
|
|
|
/**
|
|
* Strong_create is a function to enforce a certain class replacement
|
|
* e.g Php5.2's latest introduction of a namespace conflict means we have to replace
|
|
* all instances of Datetime with SSdatetime.
|
|
* this allows us to seperate those, and sapphires classes
|
|
* @param className - The class you wish to create.
|
|
* @param args - pass up to 8 arguments to the created class.
|
|
*/
|
|
public static function strong_create( $className, $arg0 = null, $arg1 = null, $arg2 = null, $arg3 = null, $arg4 = null, $arg5 = null, $arg6 = null, $arg7 = null, $arg8 = null ) {
|
|
$useStrongClassName = isset(self::$strong_classes[$className]);
|
|
if($useStrongClassName){
|
|
$classToCreate = self::$strong_classes[$className];
|
|
}
|
|
if( !isset($classToCreate) || !class_exists( self::$strong_classes[$className])){
|
|
$classToCreate = $className;
|
|
}
|
|
return new $classToCreate( $arg0, $arg1, $arg2, $arg3, $arg4, $arg5, $arg6, $arg7, $arg8 );
|
|
}
|
|
|
|
|
|
function __construct() {
|
|
$this->class = get_class($this);
|
|
|
|
// Set up the extensions
|
|
if($extensions = $this->stat('extensions')) {
|
|
foreach($extensions as $extension) {
|
|
$instance = eval("return new $extension;");
|
|
$instance->setOwner($this);
|
|
$this->extension_instances[$instance->class] = $instance;
|
|
}
|
|
}
|
|
|
|
if(!isset(Object::$classConstructed[$this->class])) {
|
|
$this->defineMethods();
|
|
Object::$classConstructed[$this->class] = true;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns true if this object "exists", i.e., has a sensible value.
|
|
* Overload this in subclasses.
|
|
* For example, an empty DataObject record could return false.
|
|
*/
|
|
public function exists() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given method exists.
|
|
*/
|
|
public function hasMethod($methodName) {
|
|
if(!isset($this->class)) $this->class = get_class($this);
|
|
if(!isset(Object::$builtInMethods['_set'][$this->class])) $this->buildMethodList();
|
|
|
|
if(isset(Object::$builtInMethods[$this->class][$methodName])) return true;
|
|
if(isset(Object::$extraMethods[$this->class][$methodName])) return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Calls a method.
|
|
* Extra methods can be hooked to a class using
|
|
*/
|
|
public function __call($methodName, $args) {
|
|
if(isset(Object::$extraMethods[$this->class][$methodName])) {
|
|
$config = Object::$extraMethods[$this->class][$methodName];
|
|
if(isset($config['parameterName'])) {
|
|
if(isset($config['arrayIndex'])) $obj = $this->{$config['parameterName']}[$config['arrayIndex']];
|
|
else $obj = $this->{$config['parameterName']};
|
|
|
|
if($obj) {
|
|
return call_user_func_array(array(&$obj, $methodName), $args);
|
|
} else {
|
|
if($this->destroyed) user_error("Attempted to call $methodName on destroyed '$this->class' object", E_USER_ERROR);
|
|
else user_error("'$this->class' object doesn't have a parameter $config[parameterName]($config[arrayIndex]) to pass control to. Perhaps this object has been mistakenly destroyed?", E_USER_WARNING);
|
|
}
|
|
|
|
} else if(isset($config['wrap'])) {
|
|
array_unshift($args, $methodName);
|
|
return call_user_func_array(array(&$this, $config['wrap']), $args);
|
|
|
|
} else if(isset($config['function'])) {
|
|
$function = $config['function'];
|
|
return $function($this, $args);
|
|
|
|
} else if($config['function_str']) {
|
|
$function = Object::$extraMethods[$this->class][$methodName]['function'] = create_function('$obj, $args', $config['function_str']);
|
|
return $function($this, $args);
|
|
|
|
} else {
|
|
user_error("Object::__call() Method '$methodName' in class '$this->class' an invalid format: " . var_export(Object::$extraMethods[$this->class][$methodName],true), E_USER_ERROR);
|
|
}
|
|
} else {
|
|
user_error("Object::__call() Method '$methodName' not found in class '$this->class'", E_USER_ERROR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add the all methods from a given parameter to this object.
|
|
* This is used for extensions.
|
|
* @param parameterName The name of the parameter. This parameter must be instanciated with an item of the correct class.
|
|
* @param arrayIndex If parameterName is an array, this can be an index. If null, we'll assume the value is all that is needed.
|
|
*/
|
|
protected function addMethodsFrom($parameterName, $arrayIndex = null) {
|
|
$obj = isset($arrayIndex) ? $this->{$parameterName}[$arrayIndex] : $this->$parameterName;
|
|
if(!$obj) user_error("Object::addMethodsFrom: $parameterName/$arrayIndex", E_USER_ERROR);
|
|
// Hack to fix Fatal error: Call to undefined method stdClass::allMethodNames()
|
|
if(method_exists($obj, 'allMethodNames')) {
|
|
$methodNames = $obj->allMethodNames(true);
|
|
foreach($methodNames as $methodName) {
|
|
Object::$extraMethods[$this->class][$methodName] = array("parameterName" => $parameterName, "arrayIndex" => $arrayIndex);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add a 'wrapper method'.
|
|
* For example, Thumbnail($arg, $arg) can be defined to call generateImage("Thumbnail", $arg, $arg)
|
|
*/
|
|
protected function addWrapperMethod($methodName, $wrapperMethod) {
|
|
Object::$extraMethods[$this->class][$methodName] = array("wrap" => $wrapperMethod);
|
|
}
|
|
|
|
/**
|
|
* Create a new method
|
|
* @param methodName The name of the method
|
|
* @param methodCode The PHP code of the method, in a string. Arguments will be contained
|
|
* in an array called $args. The object will be $obj, not $this. You won't be able to access
|
|
* any protected methods; the method is actually contained in an external function.
|
|
*/
|
|
protected function createMethod($methodName, $methodCode) {
|
|
Object::$extraMethods[$this->class][$methodName] = array("function_str" => $methodCode);
|
|
}
|
|
|
|
/**
|
|
* Return the names of all the methods on this object.
|
|
* param includeCustom If set to true, then return custom methods too.
|
|
*/
|
|
function allMethodNames($includeCustom = false) {
|
|
if(!$this->class) $this->class = get_class($this);
|
|
|
|
if(!isset(Object::$builtInMethods['_set'][$this->class])) $this->buildMethodList();
|
|
|
|
if($includeCustom && isset(Object::$extraMethods[$this->class])) {
|
|
return array_merge(Object::$builtInMethods[$this->class], array_keys(Object::$extraMethods[$this->class]));
|
|
} else {
|
|
return Object::$builtInMethods[$this->class];
|
|
}
|
|
}
|
|
|
|
function buildMethodList() {
|
|
if(!$this->class) $this->class = get_class($this);
|
|
$reflection = new ReflectionClass($this->class);
|
|
|
|
$methods = $reflection->getMethods();
|
|
foreach($methods as $method) {
|
|
$name = $method->getName();
|
|
$methodNames[$name] = $name;
|
|
}
|
|
Object::$builtInMethods[$this->class] = $methodNames;
|
|
Object::$builtInMethods['_set'][$this->class] = true ;
|
|
}
|
|
|
|
/**
|
|
* This constructor will be called the first time an object of this class is created.
|
|
* You can overload it with methods for setting up the class - for example, extra methods.
|
|
*/
|
|
protected function defineMethods() {
|
|
if($this->extension_instances) foreach($this->extension_instances as $i => $instance) {
|
|
$this->addMethodsFrom('extension_instances', $i);
|
|
}
|
|
|
|
if(isset($_REQUEST['debugmethods']) && isset(Object::$builtInMethods[$this->class])) {
|
|
Debug::require_developer_login();
|
|
echo "<h2>Methods defined for $this->class</h2>";
|
|
foreach(Object::$builtInMethods[$this->class] as $name => $info) {
|
|
echo "<li>$name";
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This method lets us extend a built-in class by adding static variables to it
|
|
*/
|
|
static function addStaticVars($class, $statics) {
|
|
if (empty(Object::$extraStatics[$class])) {
|
|
Object::$extraStatics[$class] = (array)$statics;
|
|
} else {
|
|
$ar1 = (array)Object::$extraStatics[$class]; // First Array To Merge
|
|
$ar2 = (array)$statics; // Second Array To Merge
|
|
Object::$extraStatics[$class] = array_merge_recursive($ar1, $ar2);
|
|
}
|
|
}
|
|
|
|
function parentClass() {
|
|
return get_parent_class($this);
|
|
}
|
|
function is_a($class) {
|
|
return is_a($this, $class);
|
|
}
|
|
|
|
/**
|
|
* Set an uninherited static variable
|
|
*/
|
|
function set_uninherited($name, $val) {
|
|
return Object::$uninherited_statics[$this->class][$name] = $val;
|
|
}
|
|
/**
|
|
* Get an uninherited static variable
|
|
*/
|
|
function uninherited($name, $builtIn = false) {
|
|
// Copy a built-in value into our own array cache. PHP's static variable support is shit.
|
|
if($builtIn) {
|
|
$val = $this->stat($name);
|
|
$val2 = null;
|
|
try {
|
|
// The reflection doesn't work properly in 5.1.2
|
|
if(phpversion() == '5.1.2') {
|
|
$val2 = eval('return ' . get_parent_class($this) . "::\$$name;");
|
|
} else {
|
|
$reflection = new ReflectionClass(get_parent_class($this));
|
|
$property = $reflection->getProperty($name);
|
|
$val2 = $property->getValue();
|
|
}
|
|
} catch(Exception $exc) {
|
|
// do nothing.. the property doesn't exists!
|
|
}
|
|
return ($val != $val2) ? $val : null;
|
|
}
|
|
|
|
return isset(Object::$uninherited_statics[$this->class][$name]) ? Object::$uninherited_statics[$this->class][$name] : null;
|
|
}
|
|
|
|
|
|
protected static $statics = array();
|
|
protected static $static_cached = array();
|
|
|
|
/**
|
|
* Get a static variable
|
|
*/
|
|
function stat($name) {
|
|
if(!$this->class) $this->class = get_class($this);
|
|
|
|
if(!isset(Object::$static_cached[$this->class][$name])) {
|
|
$classes = ClassInfo::ancestry($this->class);
|
|
foreach($classes as $class) {
|
|
if(isset(Object::$extraStatics[$class][$name])) {
|
|
$extra = Object::$extraStatics[$class][$name];
|
|
if(!is_array($extra)) return $extra;
|
|
break;
|
|
}
|
|
}
|
|
$stat = eval("return {$this->class}::\$$name;");
|
|
Object::$statics[$this->class][$name] = isset($extra) ? array_merge($extra, (array)$stat) : $stat;
|
|
Object::$static_cached[$this->class][$name] = true;
|
|
}
|
|
|
|
return Object::$statics[$this->class][$name];
|
|
}
|
|
/**
|
|
* Set a static variable
|
|
*/
|
|
function set_stat($name, $val) {
|
|
Object::$statics[$this->class][$name] = $val;
|
|
Object::$static_cached[$this->class][$name] = true;
|
|
}
|
|
|
|
public $class;
|
|
private static $uninherited_statics = array();
|
|
|
|
public function __toString() {
|
|
return $this->class;
|
|
}
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// EXTENSION METHODS
|
|
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Run the given function on all of this object's extensions
|
|
*
|
|
* @param string $funcName The name of the function.
|
|
* @param mixed $arg An Argument to be passed to each of the extension functions.
|
|
*/
|
|
public function extend($funcName, &$arg) {
|
|
if($this->extension_instances) {
|
|
foreach($this->extension_instances as $extension) {
|
|
if($extension->hasMethod($funcName)) {
|
|
$extension->$funcName($arg);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get an extension on this DataObject
|
|
*
|
|
* @param string $name Classname of the Extension (e.g. 'Versioned')
|
|
*
|
|
* @return DataObjectDecorator The instance of the extension
|
|
*/
|
|
public function getExtension($name) {
|
|
return $this->extension_instances[$name];
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given extension class is attached to this object
|
|
*
|
|
* @param string $requiredExtension Classname of the extension
|
|
*
|
|
* @return boolean True if the given extension class is attached to this object
|
|
*/
|
|
public function hasExtension($requiredExtension) {
|
|
return isset($this->extension_instances[$requiredExtension]) ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Add an extension to the given object.
|
|
* This can be used to add extensions to built-in objects, such as role decorators on Member
|
|
*/
|
|
public static function add_extension($className, $extensionName) {
|
|
Object::addStaticVars($className, array(
|
|
'extensions' => array(
|
|
$extensionName,
|
|
),
|
|
));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* PHP 5.2 has a namespace conflict with our datetime class,
|
|
* for legacy support, we use this overload method.
|
|
* // ENFORCE STRONG_CREATE
|
|
*/
|
|
Object::useCustomClass('Datetime','SSDatetime',true);
|
|
?>
|