Recursion Update for php-json-schema

README.md

@@ -308,7 +308,7 @@ User::export($user); // Exception: Required property missing: id at #->propertie
 
 #### Nested structures
 
-Nested structures allow you to make composition: flatten several objects in one and separate back.
+Nested structures allow you to make composition: flatten several objects in one and separate back.  For nested structures that exceed a depth of the default 200 recursion limit, submit a Context maxNestLevel of an appropriate amount.
 
 ```php
 $user = new User();
@@ -462,14 +462,16 @@ $this->assertSame(4, $res->one);
 #### Overriding mapping classes
 
 If you want to map data to a different class you can register mapping at top level of your importer structure.
-
+Additionally, you can use the option property, maxNestLevel to increase your depth beyond the default 200 which may be
+useful for certain complex Schema's.
 ```php
 class CustomSwaggerSchema extends SwaggerSchema
 {
     public static function import($data, ?Context $options = null)
     {
         if ($options === null) {
             $options = new Context();
+            $options->maxNestLevel = 500;
         }
         $options->objectItemClassMapping[Schema::className()] = CustomSchema::className();
         return parent::import($data, $options);

src/Context.php

@@ -4,6 +4,8 @@
 
 class Context extends MagicMap
 {
+    const DEFAULT_MAX_NEST = 200;
+
     public $import = true;
 
     /** @var DataPreProcessor */
@@ -51,6 +53,9 @@ class Context extends MagicMap
 
     public $isRef = false;
 
+    /** @var int property max recursive nesting depth */
+    public $maxNestLevel = self::DEFAULT_MAX_NEST;
+
     /**
      * Dereference $ref unless there is a $ref property defined with format not equal to `uri-reference`.
      * Default JSON Schema behavior is to dereference only if there is a $ref property defined with format
@@ -134,4 +139,4 @@ public function withDefault()
     }
 
 
-}
+}

src/RefResolver.php

@@ -13,6 +13,7 @@ class RefResolver
     public $url;
     /** @var null|RefResolver */
     private $rootResolver;
+    private int $maxNestLevel = 200; //Change this via options submitted to ::import if needed
 
     /**
      * @param mixed $resolutionScope
@@ -102,9 +103,10 @@ public function setupResolutionScope($id, $data)
      * RefResolver constructor.
      * @param JsonSchema $rootData
      */
-    public function __construct($rootData = null)
+    public function __construct($rootData = null, int $maxNestLevel = 200)
     {
         $this->rootData = $rootData;
+        $this->maxNestLevel = $max_nest_level;
     }
 
     public function setRootData($rootData)
@@ -224,8 +226,8 @@ public function resolveReference($referencePath)
      */
     public function preProcessReferences($data, Context $options, $nestingLevel = 0)
     {
-        if ($nestingLevel > 200) {
-            throw new Exception('Too deep nesting level', Exception::DEEP_NESTING);
+        if ($nestingLevel > $this->maxNestLevel) { //Updated due to specific recursion depth from Amazon product JSON Schemas - yep 200 was not enough
+            throw new Exception('Too deep nesting level. Nesting / Recursion level (' . $nestingLevel . ') exceeds ' . $this->maxNestLevel , Exception::DEEP_NESTING);
         }
         if (is_array($data)) {
             foreach ($data as $key => $item) {
@@ -264,4 +266,4 @@ public function preProcessReferences($data, Context $options, $nestingLevel = 0)
     }
 
 
-}
+}

src/Schema.php

@@ -165,7 +165,7 @@ public function in($data, ?Context $options = null)
         $options->import = true;
 
         if ($options->refResolver === null) {
-            $options->refResolver = new RefResolver($data);
+            $options->refResolver = new RefResolver($data, $options->maxNestLevel ?? Context::DEFAULT_MAX_NEST);
         } else {
             $options->refResolver->setRootData($data);
         }