Allow xsi:type information for use=literal polymorphism

src/Encoder/Context.php

@@ -17,6 +17,7 @@ public function __construct(
         public readonly EncoderRegistry $registry,
         public readonly Namespaces $namespaces,
         public readonly BindingUse $bindingUse = BindingUse::LITERAL,
+        public readonly bool $skipXsiTypeDetection = false,
     ) {
     }
 
@@ -28,6 +29,7 @@ public function withType(XsdType $type): self
             $this->registry,
             $this->namespaces,
             $this->bindingUse,
+            $this->skipXsiTypeDetection,
         );
     }
 
@@ -39,6 +41,19 @@ public function withBindingUse(BindingUse $bindingUse): self
             $this->registry,
             $this->namespaces,
             $bindingUse,
+            $this->skipXsiTypeDetection,
+        );
+    }
+
+    public function withSkipXsiTypeDetection(bool $skipXsiTypeDetection): self
+    {
+        return new self(
+            $this->type,
+            $this->metadata,
+            $this->registry,
+            $this->namespaces,
+            $this->bindingUse,
+            $skipXsiTypeDetection,
         );
     }
 }

src/Encoder/EncoderDetector.php

@@ -4,7 +4,6 @@
 namespace Soap\Encoding\Encoder;
 
 use Soap\Engine\Metadata\Model\XsdType;
-use Soap\WsdlReader\Model\Definitions\BindingUse;
 use stdClass;
 use WeakMap;
 
@@ -61,7 +60,7 @@ private function enhanceEncoder(Context $context, XmlEncoder $encoder): XmlEncod
         $meta = $context->type->getMeta();
         $isSimple = $meta->isSimple()->unwrapOr(false);
 
-        if (!$isSimple && !$encoder instanceof Feature\DisregardXsiInformation && $context->bindingUse === BindingUse::ENCODED) {
+        if (!$isSimple && !$encoder instanceof Feature\DisregardXsiInformation && !$context->skipXsiTypeDetection) {
             $encoder = new XsiTypeEncoder($encoder);
         }
 

src/Encoder/SimpleType/EncoderDetector.php

@@ -10,7 +10,6 @@
 use Soap\Encoding\Encoder\XmlEncoder;
 use Soap\Encoding\Encoder\XsiTypeEncoder;
 use Soap\Engine\Metadata\Model\XsdType;
-use Soap\WsdlReader\Model\Definitions\BindingUse;
 use function Psl\Iter\any;
 
 final class EncoderDetector
@@ -56,7 +55,7 @@ private function enhanceEncoder(Context $context, XmlEncoder $encoder): XmlEncod
                 $encoder = new ElementEncoder($encoder);
             }
 
-            if (!$encoder instanceof Feature\DisregardXsiInformation && $context->bindingUse === BindingUse::ENCODED) {
+            if (!$encoder instanceof Feature\DisregardXsiInformation && !$context->skipXsiTypeDetection) {
                 $encoder = new XsiTypeEncoder($encoder);
             }
 

src/TypeInference/XsiTypeDetector.php

@@ -8,7 +8,6 @@
 use Soap\Encoding\Encoder\Context;
 use Soap\Encoding\Encoder\FixedIsoEncoder;
 use Soap\Engine\Metadata\Model\XsdType;
-use Soap\WsdlReader\Model\Definitions\BindingUse;
 use Soap\WsdlReader\Parser\Xml\QnameParser;
 use Soap\Xml\Xmlns as SoapXmlns;
 use VeeWee\Xml\Xmlns\Xmlns;
@@ -47,10 +46,6 @@ static function () use ($context, $value) {
      */
     public static function detectXsdTypeFromXmlElement(Context $context, DOMElement $element): Option
     {
-        if ($context->bindingUse !== BindingUse::ENCODED) {
-            return none();
-        }
-
         $xsiType = $element->getAttributeNS(Xmlns::xsi()->value(), 'type');
         if (!$xsiType) {
             return none();
@@ -98,7 +93,7 @@ public static function detectEncoderFromXmlElement(Context $context, DOMElement
             ->withIsRepeatingElement(false);
         $encoderDetectorContext = $context
             ->withType($type->withMeta(static fn () => $encoderDetectorTypeMeta))
-            ->withBindingUse(BindingUse::LITERAL);
+            ->withSkipXsiTypeDetection(true);
 
         return some(
             new FixedIsoEncoder(