Mark Adamcin created SLING-8279: ----------------------------------- Summary: Having a Resource + ResourceMetadata should be sufficient for roundtrip link mapping. Key: SLING-8279 URL: https://issues.apache.org/jira/browse/SLING-8279 Project: Sling Issue Type: Wish Components: ResourceResolver Reporter: Mark Adamcin
With Sling Models, it is very easy to construct composite model types from more than one resource, usually addressable as a subtree of the repository. However, a pattern is emerging where mapping is being performed to create related links within the model, which mandates that SlingHttpServletRequest be used as the adaptable type, because a Resource adaptable would not provide sufficient context for ResourceResolver.map(). Without a request for context, .map() would likely return incorrect links based on a default base request URL of "http://localhost/". If you trace the code for resource resolution and mapping, you will find that it relies on just four discrete contextual properties that are currently available only from a request object (and not available from a Resource or ResourceMetadata): # scheme # host # port # contextPath In addition, given that the ResourceResolver used by servlets when handling a request is generally retrieved from the Sling Request itself using getResourceResolver(), it seems redundant in concept, not to mention clumsy in practice, to require passing the request as an argument back to the resource resolver (that was created specifically for the request in question) in order to render links for any resources resolved while servicing that request. I think it is time to change the expected behavior of ResourceResolver.resolve(String), ResourceResolver.map(String path), and other ResourceResolver methods that return resources without an explicit HttpServletRequest parameter, such that: # request.getResourceResolver().resolve(path) returns the same Resource as (any ResourceResolver).resolve(request, path) # request.getResourceResolver().map(path) returns the same String as (any ResourceResolver).map(request, path) # request.getResourceResolver().getResource(somePath).getResourceResolver().resolve(path) returns the same Resource as request.getResourceResolver().resolve(path) # request.getResourceResolver().findResources(someQuery).next().getResourceResolver().resolve(path) returns the same Resource as request.getResourceResolver().resolve(path) # etc. If these constraints can not be satisfied reasonably using the existing resolve(String) and map(String) methods, I would propose adding overloads that accept a context Resource in place of the context HttpServletRequest, with additional properties added to ResourceMetadata during request resource resolution that persist the four request context properties listed above (scheme, host, port, contextPath). -- This message was sent by Atlassian JIRA (v7.6.3#76005)