Sling Model Inject Annotation

Hi ​@nsvsrk 
Not its not true. Using Sling Model @Inject Annotation, does not copy the JCR node but try to find a resource with that type and adapt it.
You can also try to adapt a resource and update it. but I would recommend to use Sling API instead of JCR Node API to update resource/node.
https://www.javadoc.io/doc/org.apache.sling/org.apache.sling.api/2.16.0/org/apache/sling/api/resource/ModifiableValueMap.html

Hi ​@nsvsrk 

It is not possible. The @Inject annotation is for adapting the object to the closest possible type by the Sling Models Injector.

To "reverse" the process, you need to obtain a ModifiableValueMap from the resource. Here is the standard pattern:

public void updateNodeProperty(ResourceResolver resolver, String path, String newValue) {

    Resource resource = resolver.getResource(path);

    if (resource != null) {

        ModifiableValueMap map = resource.adaptTo(ModifiableValueMap.class);

        if (map != null) {
            map.put("myProperty", newValue);
            try {
                resolver.commit();
            } catch (PersistenceException e) {
                // Handle error
            }
        }
    }
}