> + .filter(new Predicate<OperatingSystem>() {
> + @Override
> + public boolean apply(OperatingSystem input) {
> + return input.getId().contains(imageId);
> + }
> + }), Predicates.notNull());
> + }
> +
> + private Optional<OperatingSystem>
> tryExtractOperatingSystemFrom(VirtualGuestBlockDeviceTemplateGroup image) {
> + return FluentIterable.from(image.getChildren())
> + .transformAndConcat(new
> BlockDeviceTemplateGroupToBlockDeviceTemplateIterable())
> + .filter(new IsBootableDevice())
> + .transformAndConcat(new
> VirtualGuestBlockDeviceTemplateIterableFunction())
> + .transform(new DiskImageSoftwareToSoftwareDescription())
> + .filter(new IsOperatingSystem())
> + .transform(new
> SoftwareDescriptionToOperatingSystem(image.getGlobalIdentifier()))
Do all the functions being passed here need to be instantiated each time? Or
could we use a singleton for them?
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