minor #30965 Prepare for the new serialization mechanism (fancyweb)

This PR was merged into the 4.3-dev branch.

Discussion
----------

Prepare for the new serialization mechanism

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

#eufossa

Should I maybe split this component by component ?

https://wiki.php.net/rfc/custom_object_serialization has been accepted.

Best viewed in "split" mode.

This work is kind of required for symfony/symfony#30304 so we don't trigger 30 deprecations from our own code base.

Commits
-------

d412e77a9c Prepare for the new serialization mechanism

Author: fabpot

CompiledRoute.php

@@ -49,12 +49,9 @@ public function __construct(string $staticPrefix, string $regex, array $tokens,
         $this->variables = $variables;
     }
 
-    /**
-     * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
-     */
-    public function serialize()
+    public function __serialize(): array
     {
-        return serialize([
+        return [
             'vars' => $this->variables,
             'path_prefix' => $this->staticPrefix,
             'path_regex' => $this->regex,
@@ -63,16 +60,19 @@ public function serialize()
             'host_regex' => $this->hostRegex,
             'host_tokens' => $this->hostTokens,
             'host_vars' => $this->hostVariables,
-        ]);
+        ];
     }
 
     /**
      * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
      */
-    public function unserialize($serialized)
+    public function serialize()
     {
-        $data = unserialize($serialized, ['allowed_classes' => false]);
+        return serialize($this->__serialize());
+    }
 
+    public function __unserialize(array $data): void
+    {
         $this->variables = $data['vars'];
         $this->staticPrefix = $data['path_prefix'];
         $this->regex = $data['path_regex'];
@@ -83,6 +83,14 @@ public function unserialize($serialized)
         $this->hostVariables = $data['host_vars'];
     }
 
+    /**
+     * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
+     */
+    public function unserialize($serialized)
+    {
+        $this->__unserialize(unserialize($serialized, ['allowed_classes' => false]));
+    }
+
     /**
      * Returns the static prefix.
      *

Route.php

@@ -62,12 +62,9 @@ public function __construct(string $path, array $defaults = [], array $requireme
         $this->setCondition($condition);
     }
 
-    /**
-     * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
-     */
-    public function serialize()
+    public function __serialize(): array
     {
-        return serialize([
+        return [
             'path' => $this->path,
             'host' => $this->host,
             'defaults' => $this->defaults,
@@ -77,15 +74,19 @@ public function serialize()
             'methods' => $this->methods,
             'condition' => $this->condition,
             'compiled' => $this->compiled,
-        ]);
+        ];
     }
 
     /**
      * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
      */
-    public function unserialize($serialized)
+    public function serialize()
+    {
+        return serialize($this->__serialize());
+    }
+
+    public function __unserialize(array $data): void
     {
-        $data = unserialize($serialized);
         $this->path = $data['path'];
         $this->host = $data['host'];
         $this->defaults = $data['defaults'];
@@ -102,6 +103,14 @@ public function unserialize($serialized)
         }
     }
 
+    /**
+     * @internal since Symfony 4.3, will be removed in Symfony 5 as the class won't implement Serializable anymore
+     */
+    public function unserialize($serialized)
+    {
+        $this->__unserialize(unserialize($serialized));
+    }
+
     /**
      * Returns the pattern for the path.
      *