Review

finding-8

/mubench/checkouts/jigsaw/205/build/Jigsaw/src/classes/org/w3c/jigsaw/servlet/JigsawServletContext.java

getLocalRoot(ResourceReference, ResourceReference)

class JigsawServletContext {
    protected static ResourceReference getLocalRoot(ResourceReference rr_root,
						    ResourceReference ref) 
    {
	try {
	    FramedResource root = (FramedResource)rr_root.lock();
	    if (root instanceof VirtualHostResource) {
		//backward to the virtual host resource
		ResourceReference rr  = null;
		ResourceReference rrp = null;
		FramedResource    res = null;
		try {
		    res = (FramedResource)ref.lock();
		    if (res instanceof ResourceFrame) {
			ResourceFrame fr = (ResourceFrame)res;
			rr = fr.getResource().getResourceReference();
		    } else {
			rr = ref;
		    }
		} catch (InvalidResourceException ex) {
		    return rr_root;
		} finally {
		    ref.unlock();
		}

		while (true) {
		    try {
			res = (FramedResource)rr.lock();
			rrp = res.getParent();
			if ((rrp == rr_root) || (rrp == null)) {
			    return getLocalRoot(rr, ref);
			}
		    } catch (InvalidResourceException ex) {
			return rr_root;
		    } finally {
			rr.unlock();
		    }
		    rr = rrp;
		}
	    } else {
		try {
		    FramedResource res = (FramedResource)rr_root.lock();
		    ForwardFrame   ffr = (ForwardFrame)
			res.getFrame("org.w3c.jigsaw.proxy.ForwardFrame");
		    if (ffr == null) {
			return rr_root;
		    } else {
			ResourceReference rr = ffr.getLocalRootResource();
			return getLocalRoot(rr, ref);
		    }
		} catch (InvalidResourceException ex) {
		    return rr_root;
		}
	    }
	} catch (InvalidResourceException ex) {
	    return rr_root;
	} finally {
	    rr_root.unlock();
	}
    }

}