From 5923e574192fcd8a2f05dae3f6d65d8305807291 Mon Sep 17 00:00:00 2001
From: "Alexander M. Turek" <me@derrabus.de>
Date: Sun, 2 Jan 2022 13:56:39 +0100
Subject: [PATCH] Skip writing readonly properties if the value did not change

---
 .../ORM/Mapping/ClassMetadataInfo.php         | 31 ++++++++---
 .../Mapping/ReflectionReadonlyProperty.php    | 51 +++++++++++++++++++
 psalm-baseline.xml                            |  2 +-
 psalm.xml                                     |  6 +++
 4 files changed, 81 insertions(+), 9 deletions(-)
 create mode 100644 lib/Doctrine/ORM/Mapping/ReflectionReadonlyProperty.php

diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index 0359c2731da..c95461030bd 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -705,7 +705,7 @@ class ClassMetadataInfo implements ClassMetadata
     /**
      * The ReflectionProperty instances of the mapped class.
      *
-     * @var ReflectionProperty[]|null[]
+     * @var array<string, ReflectionProperty|null>
      */
     public $reflFields = [];
 
@@ -993,7 +993,8 @@ public function wakeupReflection($reflService)
 
         foreach ($this->embeddedClasses as $property => $embeddedClass) {
             if (isset($embeddedClass['declaredField'])) {
-                $childProperty = $reflService->getAccessibleProperty(
+                $childProperty = $this->getAccessibleProperty(
+                    $reflService,
                     $this->embeddedClasses[$embeddedClass['declaredField']]['class'],
                     $embeddedClass['originalField']
                 );
@@ -1007,7 +1008,8 @@ public function wakeupReflection($reflService)
                 continue;
             }
 
-            $fieldRefl = $reflService->getAccessibleProperty(
+            $fieldRefl = $this->getAccessibleProperty(
+                $reflService,
                 $embeddedClass['declared'] ?? $this->name,
                 $property
             );
@@ -1020,15 +1022,15 @@ public function wakeupReflection($reflService)
             if (isset($mapping['declaredField']) && isset($parentReflFields[$mapping['declaredField']])) {
                 $this->reflFields[$field] = new ReflectionEmbeddedProperty(
                     $parentReflFields[$mapping['declaredField']],
-                    $reflService->getAccessibleProperty($mapping['originalClass'], $mapping['originalField']),
+                    $this->getAccessibleProperty($reflService, $mapping['originalClass'], $mapping['originalField']),
                     $mapping['originalClass']
                 );
                 continue;
             }
 
             $this->reflFields[$field] = isset($mapping['declared'])
-                ? $reflService->getAccessibleProperty($mapping['declared'], $field)
-                : $reflService->getAccessibleProperty($this->name, $field);
+                ? $this->getAccessibleProperty($reflService, $mapping['declared'], $field)
+                : $this->getAccessibleProperty($reflService, $this->name, $field);
 
             if (isset($mapping['enumType']) && $this->reflFields[$field] !== null) {
                 $this->reflFields[$field] = new ReflectionEnumProperty(
@@ -1040,8 +1042,8 @@ public function wakeupReflection($reflService)
 
         foreach ($this->associationMappings as $field => $mapping) {
             $this->reflFields[$field] = isset($mapping['declared'])
-                ? $reflService->getAccessibleProperty($mapping['declared'], $field)
-                : $reflService->getAccessibleProperty($this->name, $field);
+                ? $this->getAccessibleProperty($reflService, $mapping['declared'], $field)
+                : $this->getAccessibleProperty($reflService, $this->name, $field);
         }
     }
 
@@ -3779,4 +3781,17 @@ private function assertMappingOrderBy(array $mapping): void
             throw new InvalidArgumentException("'orderBy' is expected to be an array, not " . gettype($mapping['orderBy']));
         }
     }
+
+    /**
+     * @psalm-param class-string $class
+     */
+    private function getAccessibleProperty(ReflectionService $reflService, string $class, string $field): ?ReflectionProperty
+    {
+        $reflectionProperty = $reflService->getAccessibleProperty($class, $field);
+        if ($reflectionProperty !== null && PHP_VERSION_ID >= 80100 && $reflectionProperty->isReadOnly()) {
+            $reflectionProperty = new ReflectionReadonlyProperty($reflectionProperty);
+        }
+
+        return $reflectionProperty;
+    }
 }
diff --git a/lib/Doctrine/ORM/Mapping/ReflectionReadonlyProperty.php b/lib/Doctrine/ORM/Mapping/ReflectionReadonlyProperty.php
new file mode 100644
index 00000000000..87cf4245fb6
--- /dev/null
+++ b/lib/Doctrine/ORM/Mapping/ReflectionReadonlyProperty.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\ORM\Mapping;
+
+use InvalidArgumentException;
+use LogicException;
+use ReflectionProperty;
+
+use function assert;
+use function func_get_args;
+use function func_num_args;
+use function is_object;
+use function sprintf;
+
+/**
+ * @internal
+ */
+final class ReflectionReadonlyProperty extends ReflectionProperty
+{
+    public function __construct(
+        private ReflectionProperty $wrappedProperty
+    ) {
+        if (! $wrappedProperty->isReadOnly()) {
+            throw new InvalidArgumentException('Given property is not readonly.');
+        }
+
+        parent::__construct($wrappedProperty->class, $wrappedProperty->name);
+    }
+
+    public function getValue(?object $object = null): mixed
+    {
+        return $this->wrappedProperty->getValue(...func_get_args());
+    }
+
+    public function setValue(mixed $objectOrValue, mixed $value = null): void
+    {
+        if (func_num_args() < 2 || $objectOrValue === null || ! $this->isInitialized($objectOrValue)) {
+            $this->wrappedProperty->setValue(...func_get_args());
+
+            return;
+        }
+
+        assert(is_object($objectOrValue));
+
+        if (parent::getValue($objectOrValue) !== $value) {
+            throw new LogicException(sprintf('Attempting to change readonly property %s::%s.', $this->class, $this->name));
+        }
+    }
+}
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index d5aacf2cf8d..2951933684e 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -820,7 +820,7 @@
       <code>$parentReflFields[$embeddedClass['declaredField']]</code>
       <code>$parentReflFields[$mapping['declaredField']]</code>
       <code>$queryMapping['resultClass']</code>
-      <code>$reflService-&gt;getAccessibleProperty($mapping['originalClass'], $mapping['originalField'])</code>
+      <code>$this-&gt;getAccessibleProperty($reflService, $mapping['originalClass'], $mapping['originalField'])</code>
     </PossiblyNullArgument>
     <PossiblyNullPropertyFetch occurrences="2">
       <code>$embeddable-&gt;reflClass-&gt;name</code>
diff --git a/psalm.xml b/psalm.xml
index 57dabceddeb..5332ca03b6a 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -75,6 +75,12 @@
                 <referencedClass name="Doctrine\DBAL\Platforms\PostgreSQLPlatform" />
             </errorLevel>
         </InvalidClass>
+        <MethodSignatureMismatch>
+            <errorLevel type="suppress">
+                <!-- Psalm is wrong about ReflectionProperty signatures. -->
+                <file name="lib/Doctrine/ORM/Mapping/ReflectionReadonlyProperty.php"/>
+            </errorLevel>
+        </MethodSignatureMismatch>
         <MissingDependency>
             <errorLevel type="suppress">
                 <!-- DBAL 3.2 forward compatibility -->