Force service prefix in LoggerAbstractServiceFactory

- To prevent collisions with other abstract factories, the logger
  abstract factory should require that, when requesting a service, the
  service name be prefixed. I chose "Logger", as that's the service type
  being requested.
- This complements the approach in zendframework#4253 for cache
  objects.
- Not a BC break, as the LoggerAbstractServiceFactory has not yet been
  released.

library/Zend/Log/LoggerAbstractServiceFactory.php

@@ -27,8 +27,18 @@ class LoggerAbstractServiceFactory implements AbstractFactoryInterface
      */
     public function canCreateServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
     {
-        $config = $serviceLocator->get('Config');
-        return isset($config['log'][$requestedName]);
+        if ('logger\\' != substr(strtolower($requestedName), 0, 7)) {
+            return false;
+        }
+
+        $config  = $serviceLocator->get('Config');
+        if (!isset($config['log'])) {
+            return false;
+        }
+
+        $config  = array_change_key_case($config['log']);
+        $service = substr(strtolower($requestedName), 7);
+        return isset($config[$service]);
     }
 
     /**
@@ -39,7 +49,9 @@ public function canCreateServiceWithName(ServiceLocatorInterface $serviceLocator
      */
     public function createServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
     {
-        $config = $serviceLocator->get('Config');
-        return new Logger($config['log'][$requestedName]);
+        $config  = $serviceLocator->get('Config');
+        $config  = array_change_key_case($config['log']);
+        $service = substr(strtolower($requestedName), 7);
+        return new Logger($config[$service]);
     }
 }

tests/ZendTest/Log/LoggerAbstractServiceFactoryTest.php

@@ -39,8 +39,8 @@ protected function setUp()
 
         $this->serviceManager->setService('Config', array(
             'log' => array(
-                'Application\Frontend\Logger' => array(),
-                'Application\Backend\Logger' => array(),
+                'Application\Frontend' => array(),
+                'Application\Backend'  => array(),
             ),
         ));
     }
@@ -51,8 +51,8 @@ protected function setUp()
     public function providerValidLoggerService()
     {
         return array(
-            array('Application\Frontend\Logger'),
-            array('Application\Backend\Logger'),
+            array('Logger\Application\Frontend'),
+            array('Logger\Application\Backend'),
         );
     }
 
@@ -62,7 +62,9 @@ public function providerValidLoggerService()
     public function providerInvalidLoggerService()
     {
         return array(
-            array('Application\Unknown\Logger'),
+            array('Logger\Application\Unknown'),
+            array('Application\Frontend'),
+            array('Application\Backend'),
         );
     }