Filter prefix in keys

src/Gaufrette/Adapter.php

@@ -45,7 +45,7 @@ function exists($key);
      *
      * @return array
      */
-    function keys();
+    function keys($prefix = null);
 
     /**
      * Returns the last modified time

src/Gaufrette/Adapter/AclAwareAmazonS3.php

@@ -131,9 +131,9 @@ public function checksum($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
-        return $this->delegate->keys();
+        return $this->delegate->keys($prefix);
     }
 
     /**

src/Gaufrette/Adapter/AmazonS3.php

@@ -189,11 +189,15 @@ protected function getHeaders($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
         $this->ensureBucketExists();
 
-        $response = $this->service->list_objects($this->bucket);
+		$options = array();
+	    if (null !== $prefix) {
+	        $options['prefix'] = $prefix;
+	    }
+        $response = $this->service->list_objects($this->bucket, $options);
         if (!$response->isOK()) {
             throw new \RuntimeException('Could not get the keys.');
         }

src/Gaufrette/Adapter/Apc.php

@@ -71,9 +71,14 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
-        $pattern = sprintf('/^%s/', preg_quote($this->prefix));
+		if (null !== $prefix) {
+		    $prefix = $this->computePath($prefix);
+		} else {
+			$prefix = $this->prefix;
+		}
+        $pattern = sprintf('/^%s/', preg_quote($prefix));
         $cachedKeys = new \APCIterator('user', $pattern, APC_ITER_NONE);
 
         if (null === $cachedKeys) {

src/Gaufrette/Adapter/Cache.php

@@ -132,8 +132,11 @@ public function checksum($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
+		if (null !== $prefix) {
+		    throw new \BadMethodCallException("Usage of prefix filter not implemented yet.");
+		}
         $cacheFile = 'keys.cache';
         if ($this->needsRebuild($cacheFile)) {
             $keys = $this->source->keys();

src/Gaufrette/Adapter/Ftp.php

@@ -134,8 +134,11 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
+		if (null !== $prefix) {
+		    return $this->fetchKeys($prefix);
+		}
         return $this->fetchKeys();
     }
 

src/Gaufrette/Adapter/GridFS.php

@@ -166,12 +166,16 @@ public function query($keyFragment, $filesystem, $sortKey = 'name', $sortDirecti
     /**
      * {@InheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
-        /**
-         * This seems to work but performance is a big question...
-         */
-        $cursor = $this->gridfsInstance->find(array(), array('key'));
+		if (null !== $prefix) {
+		    $cursor = $this->gridfsInstance->find(array('key' => sprintf('/^%s/', preg_quote($prefix)) ), array('key'));
+		} else {
+            /**
+             * This seems to work but performance is a big question...
+             */
+            $cursor = $this->gridfsInstance->find(array(), array('key'));
+        }
         $temp = array();
         foreach($cursor as $f) {
             $temp[] = $f->file['key'];

src/Gaufrette/Adapter/InMemory.php

@@ -113,8 +113,11 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
+		if (null !== $prefix) {
+		    throw new \BadMethodCallException("Usage of prefix filter not implemented yet.");
+		}
         return array_keys($this->files);
     }
 

src/Gaufrette/Adapter/Local.php

@@ -90,8 +90,11 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
+		if (null !== $prefix) {
+		    throw new \BadMethodCallException("Usage of prefix filter not implemented yet.");
+		}
         $iterator = new \RecursiveIteratorIterator(
             new \RecursiveDirectoryIterator(
                 $this->directory,

src/Gaufrette/Adapter/MogileFS.php

@@ -129,7 +129,7 @@ public function exists($key)
     /**
      * {@InheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
         throw new \BadMethodCallException("Method not implemented yet.");
     }

src/Gaufrette/Adapter/RackspaceCloudfiles.php

@@ -80,8 +80,11 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
+		if (null !== $prefix) {
+		    throw new \BadMethodCallException("Usage of prefix filter not implemented yet.");
+		}
         return $this->container->list_objects(0, null, null);
     }
 

src/Gaufrette/Adapter/Sftp.php

@@ -88,7 +88,7 @@ public function exists($key)
     /**
      * {@inheritDoc}
      */
-    public function keys()
+    public function keys($prefix = null)
     {
         $this->initialize();
 

src/Gaufrette/Filesystem.php

@@ -128,9 +128,9 @@ public function delete($key)
      *
      * @return array
      */
-    public function keys()
+    public function keys($prefix = null)
     {
-        return $this->adapter->keys();
+        return $this->adapter->keys($prefix);
     }
 
     /**
@@ -149,7 +149,7 @@ public function listDirectory($directory = '')
         // Cache adapter returns null if source-Adapter does not provide the listDirectory method
         if (!$listing) {
             $listing = array(
-                'keys'  => $this->keys(),
+                'keys'  => $this->keys((empty($directory))?null:$directory),
                 'dirs'  => array()
             );
         }