refactor(Context): Returns null instead of throwing exception if the member is not found.

Author: priyadi

CHANGELOG.md

@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## 0.8.0
+
+* refactor(`Context`): Returns null instead of throwing exception if the
+  member is not found.
+
 ## 0.7.3
 
 * test: Add tests for read-only targets.

src/Context/Context.php

@@ -74,23 +74,22 @@ public function without(object|string $value): self
     /**
      * @template T of object
      * @param class-string<T> $class
-     * @return T
-     * @throws ContextMemberNotFoundException
+     * @return T|null
      */
-    public function get(string $class): object
+    public function get(string $class): ?object
     {
         // @phpstan-ignore-next-line
-        return $this->context[$class] ?? throw new ContextMemberNotFoundException();
+        return $this->context[$class] ?? null;
     }
 
     /**
      * @template T of object
      * @param class-string<T> $class
-     * @return T
+     * @return T|null
      */
-    public function __invoke(string $class): object
+    public function __invoke(string $class): ?object
     {
         // @phpstan-ignore-next-line
-        return $this->context[$class] ?? throw new ContextMemberNotFoundException();
+        return $this->context[$class] ?? null;
     }
 }

src/Context/ContextMemberNotFoundException.php

@@ -14,7 +14,6 @@
 namespace Rekalogika\Mapper\Debug;
 
 use Rekalogika\Mapper\Context\Context;
-use Rekalogika\Mapper\Context\ContextMemberNotFoundException;
 use Rekalogika\Mapper\MainTransformer\MainTransformerInterface;
 use Rekalogika\Mapper\MainTransformer\Model\DebugContext;
 use Rekalogika\Mapper\MainTransformer\Model\Path;
@@ -65,17 +64,12 @@ public function transform(
         ?Type $targetType,
         Context $context
     ): mixed {
-        try {
-            $path = $context(Path::class)->getLast();
-        } catch (ContextMemberNotFoundException) {
-            $path = null;
-        }
+        $path = $context(Path::class)?->getLast();
 
-        try {
-            $debugContext = $context(DebugContext::class);
+        if ($debugContext = $context(DebugContext::class)) {
             $possibleTargetTypes = $debugContext->getTargetTypes();
             $sourceTypeGuessed = $debugContext->isSourceTypeGuessed();
-        } catch (ContextMemberNotFoundException) {
+        } else {
             $possibleTargetTypes = null;
             $sourceTypeGuessed = false;
         }
@@ -90,12 +84,11 @@ public function transform(
             sourceTypeGuessed: $sourceTypeGuessed
         );
 
-        try {
-            // add trace data to parent trace data
-            $parentTraceData = $context(TraceData::class);
+        // add trace data to parent trace data
+        if ($parentTraceData = $context(TraceData::class)) {
             $parentTraceData->addNestedTraceData($traceData);
             $context = $context->with($traceData);
-        } catch (ContextMemberNotFoundException) {
+        } else {
             // @phpstan-ignore-next-line
             $backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3);
             $caller = $backtrace[2];

src/Debug/TraceableTransformer.php

@@ -14,7 +14,6 @@
 namespace Rekalogika\Mapper\Exception;
 
 use Rekalogika\Mapper\Context\Context;
-use Rekalogika\Mapper\Context\ContextMemberNotFoundException;
 use Rekalogika\Mapper\MainTransformer\Model\Path;
 
 trait ContextAwareExceptionTrait
@@ -25,11 +24,7 @@ public function __construct(
         ?\Throwable $previous = null,
         protected ?Context $context = null,
     ) {
-        try {
-            $path = $context?->get(Path::class);
-        } catch (ContextMemberNotFoundException) {
-            $path = null;
-        }
+        $path = $context?->get(Path::class);
 
         $path = (string) $path;
         if ($path === '') {

src/Exception/ContextAwareExceptionTrait.php

@@ -14,7 +14,6 @@
 namespace Rekalogika\Mapper\MainTransformer;
 
 use Rekalogika\Mapper\Context\Context;
-use Rekalogika\Mapper\Context\ContextMemberNotFoundException;
 use Rekalogika\Mapper\MainTransformer\Exception\CannotFindTransformerException;
 use Rekalogika\Mapper\MainTransformer\Exception\CircularReferenceException;
 use Rekalogika\Mapper\MainTransformer\Exception\TransformerReturnsUnexpectedValueException;
@@ -96,31 +95,26 @@ public function transform(
 
         // get or create object cache
 
-        try {
-            $objectCache = $context(ObjectCache::class);
-        } catch (ContextMemberNotFoundException) {
+        if (!($objectCache = $context(ObjectCache::class))) {
             $objectCache = $this->objectCacheFactory->createObjectCache();
             $context = $context->with($objectCache);
         }
 
         // initialize path it it doesn't exist
 
-        try {
-            $pathContext = $context(Path::class);
-
+        if ($pathContext = $context(Path::class)) {
             // append path
 
             if ($path === null) {
                 $path = '(not specified)';
             }
 
             $context = $context->with($pathContext->append($path));
-        } catch (ContextMemberNotFoundException) {
+        } else {
             $pathContext = Path::create();
             $context = $context->with($pathContext);
         }
 
-
         // determine the source type
 
         if ($sourceType !== null) {

src/MainTransformer/MainTransformer.php

@@ -131,7 +131,7 @@ public function cache(mixed $target): void
             throw new CacheNotSupportedException($this->context);
         }
 
-        ($this->context)(ObjectCache::class)->saveTarget(
+        ($this->context)(ObjectCache::class)?->saveTarget(
             source: $this->source,
             targetType: $this->targetType,
             target: $target

src/SubMapper/Implementation/SubMapper.php

@@ -14,7 +14,6 @@
 namespace Rekalogika\Mapper\Transformer;
 
 use Rekalogika\Mapper\Context\Context;
-use Rekalogika\Mapper\Context\ContextMemberNotFoundException;
 use Rekalogika\Mapper\Exception\InvalidArgumentException;
 use Rekalogika\Mapper\Serializer\DenormalizerContext;
 use Rekalogika\Mapper\Transformer\Contracts\TransformerInterface;
@@ -53,11 +52,7 @@ public function transform(
             throw new InvalidTypeInArgumentException('Target type must be an object, "%s" given', $targetType, context: $context);
         }
 
-        try {
-            $denormalizerContext = $context(DenormalizerContext::class)->toArray();
-        } catch (ContextMemberNotFoundException) {
-            $denormalizerContext = [];
-        }
+        $denormalizerContext = $context(DenormalizerContext::class)?->toArray() ?? [];
 
         if ($target !== null) {
             if (!is_object($target)) {

src/Transformer/ArrayToObjectTransformer.php

@@ -14,7 +14,6 @@
 namespace Rekalogika\Mapper\Transformer;
 
 use Rekalogika\Mapper\Context\Context;
-use Rekalogika\Mapper\Context\ContextMemberNotFoundException;
 use Rekalogika\Mapper\Exception\InvalidArgumentException;
 use Rekalogika\Mapper\Serializer\NormalizerContext;
 use Rekalogika\Mapper\Transformer\Contracts\TransformerInterface;
@@ -46,11 +45,7 @@ public function transform(
             throw new InvalidArgumentException(sprintf('Source must be object, "%s" given', get_debug_type($source)), context: $context);
         }
 
-        try {
-            $normalizerContext = $context(NormalizerContext::class)->toArray();
-        } catch (ContextMemberNotFoundException) {
-            $normalizerContext = [];
-        }
+        $normalizerContext = $context(NormalizerContext::class)?->toArray() ?? [];
 
         return $this->normalizer->normalize(
             $source,

src/Transformer/ObjectToArrayTransformer.php

@@ -140,7 +140,7 @@ public function transform(
 
         // save object to cache
 
-        $context(ObjectCache::class)->saveTarget(
+        $context(ObjectCache::class)?->saveTarget(
             source: $source,
             targetType: $targetType,
             target: $target,

src/Transformer/ObjectToObjectTransformer.php

@@ -137,7 +137,7 @@ private function eagerTransform(
 
         // Add the target to cache
 
-        $context(ObjectCache::class)->saveTarget(
+        $context(ObjectCache::class)?->saveTarget(
             source: $source,
             targetType: $metadata->getTargetType(),
             target: $target,

src/Transformer/TraversableToArrayAccessTransformer.php

@@ -89,7 +89,7 @@ public function transform(
 
         // Add to cache
 
-        $context(ObjectCache::class)->saveTarget(
+        $context(ObjectCache::class)?->saveTarget(
             source: $source,
             targetType: $targetType,
             target: $target,