Examples with N4JSResource org.eclipse.n4js.resource.N4JSResource used on opensource projects

Example 21 with N4JSResource

use of org.eclipse.n4js.resource.N4JSResource in project n4js by eclipse.

the class UserDataAwareScope method resolve.

private IEObjectDescription resolve(IEObjectDescription original) {
    if (original != null && original.getEObjectOrProxy().eIsProxy() && EcoreUtil2.isAssignableFrom(type, original.getEClass())) {
        final URI objectURI = original.getEObjectURI();
        final URI resourceURI = objectURI.trimFragment();
        Resource resource = resourceSet.getResource(resourceURI, false);
        if (resource != null && resource.isLoaded()) {
            return original;
        }
        final boolean mustLoadFromSource = canLoadFromDescriptionHelper.mustLoadFromSource(resourceURI, resourceSet);
        resource = resourceSet.getResource(resourceURI, mustLoadFromSource);
        if (resource != null && resource.isLoaded()) {
            return original;
        }
        if (mustLoadFromSource) {
            // --> still avoid loading from index; instead simply return 'original' as in other error cases
            return original;
        }
        if (resource == null) {
            resource = resourceSet.createResource(resourceURI);
        }
        if (resource instanceof N4JSResource) {
            if (resource.getContents().isEmpty()) {
                N4JSResource casted = (N4JSResource) resource;
                IResourceDescription resourceDescription = container.getResourceDescription(resourceURI);
                if (resourceDescription != null) {
                    if (casted.isLoaded()) {
                        // will load that stuff on #getResourceDescription
                        return original;
                    }
                    try {
                        if (!casted.loadFromDescription(resourceDescription)) {
                            return original;
                        }
                    } catch (Exception e) {
                        casted.unload();
                        return original;
                    }
                } else {
                    return original;
                }
            }
            // resolveProxy is implemented recursively thus we have to avoid
            // that here by decorating the
            // description and return the resolved instance instead
            EObject resolved = resolveObject(objectURI, resource);
            if (resolved == null) {
                return original;
            }
            return new ResolvedDescription(resolved, original);
        }
    }
    return original;
}