<?php
/**
* @author oliver anan <oliver@ananit.de>
* @version 1.0
* @copyright oliver anan
* @license LGPL 3 http://www.gnu.org/licenses/lgpl.html
* Service provider for creating empty interfaces at runtime.
* If an class implements an interface that is not bundled with the class
* this class can be used to prevent an 'interface not found' error.
*/
abstract class VirtualInterface{
/**
* @author oliver anan <oliver@ananit.de>
* @version 1.0
* @since 1.0
* @var string[]
* A list of all generated interfaces.
*/
protected static $virtualized = array();
/**
* @author oliver anan <oliver@ananit.de>
* @version 1.0
* @since 1.0
* @param $interface The name of the interface including the namespace without a leading '\'.
* @param $autoload Indicates if the method should attemp to autoload the interface. Default is true.
* @return boolean true if the method creates the interface, false if the interface can be autoloaded.
* @example VirtualInterface::add('MyNamespace\foo'); class bar implements MyNamespace\foo{...}
* loads MyNamespace\foo if it is available. If it can not be loaded a empty interface 'foo' will be generated
* in the namespace 'myNamespace'
*/
public static function add($interface,$autoload=true){
if(! interface_exists($interface,$autoload)){
//seperate interface name and namespace
$parts = explode('\\',$interface);
$interfaceName = array_pop($parts);
$namespace = implode('\\',$parts);
//generate source code
$code = '';
if($namespace) $code .= "namespace $namespace;";
$code .= " interface $interfaceName {}";
//create interface
echo $code;
eval($code);
self::$virtualized[] = $interface;
return true;
}
else return false;
}
/**
* @author oliver anan <oliver@ananit.de>
* @version 1.0
* @since 1.0
* @param $interface the name of the interface including the namespace without a leading '\'.
* @return boolean true if the interface is virtual.
*/
public static function isVirtual($interface){
return (array_search($interface, self::$virtualized)!==false);
}
/**
* @author oliver anan <oliver@ananit.de>
* @version 1.0
* @since 1.0
* @return string[] A list of all generated interfaces.
*/
public static function getVirtualized(){
return self::$virtualized;
}
}
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