Add pjson support

src/Mapper/DocumentMapper.php

@@ -3,8 +3,8 @@
 namespace BitBadger\PDODocument\Mapper;
 
 use BitBadger\PDODocument\DocumentException;
+use Exception;
 use JsonMapper;
-use JsonMapper_Exception;
 
 /**
  * Map domain class instances from JSON documents
@@ -32,12 +32,15 @@ class DocumentMapper implements Mapper
     public function map(array $result): mixed
     {
         try {
+            if (method_exists($this->className, 'fromJsonString')) {
+                return $this->className::fromJsonString($result[$this->fieldName]);
+            }
             $json = json_decode($result[$this->fieldName]);
             if (is_null($json)) {
                 throw new DocumentException("Could not map document for $this->className: " . json_last_error_msg());
             }
             return (new JsonMapper())->map($json, $this->className);
-        } catch (JsonMapper_Exception $ex) {
+        } catch (Exception $ex) {
             throw new DocumentException("Could not map document for $this->className", previous: $ex);
         }
     }

src/Parameters.php

@@ -27,7 +27,10 @@ class Parameters
      */
     public static function json(string $name, object|array $document): array
     {
-        return [$name => json_encode($document, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)];
+        return [$name => match (is_object($document) && method_exists($document, 'toJson')) {
+            true  => $document->toJson(),
+            false => json_encode($document, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
+        }];
     }
 
     /**