Abstract classes

JsonMapper can support abstract types but requires a factory to be registered which can map the data to the correct concrete implementation of the abstract class. During the building phase of the JsonMapper instance you can use the\JsonMapper\Handler\FactoryRegistry which is the second parameter ($nonInstantiableTypeResolver) to the \JsonMapper\Handler\PropertyMapper constructor.

Example#

<?php
 
$nonInstantiableTypeResolver = new \JsonMapper\Handler\FactoryRegistry();
$nonInstantiableTypeResolver->addFactory(
    \App\Shapes\AbstractShape::class,
    new \App\Shapes\ShapeInstanceFactory()
);
 
$mapper = \JsonMapper\JsonMapperBuilder::new()
    ->withPropertyMapper(new \JsonMapper\Handler\PropertyMapper(null, $nonInstantiableTypeResolver))
    ->withDocBlockAnnotationsMiddleware()
    ->withNamespaceResolverMiddleware()
    ->build();
 
$object = new \App\Shapes\AbstractShapeWrapper();
$mapper->mapObjectFromString('{"shape": {"type": "square", "width": 5, "length": 6}}', $object);

AbstractShape, AbstractShapeWrapper and ShapeInstanceFactory above stand in for your own classes. A working equivalent can be found in the integration test.