private void includeLayer(ConfigModelStack configStack, ConfigId layerId) throws ProvisioningException { if(!configStack.addLayer(layerId)) { return; } final ConfigModelStack layerStack = resolveConfigLayer(layerId); if(layerStack.hasLayerDeps()) { for(ConfigLayerDependency layerDep : layerStack.getLayerDeps()) { if(configStack.isLayerExcluded(layerDep.getName())) { if(layerDep.isOptional()) { continue; } throw new ProvisioningException(Errors.unsatisfiedLayerDependency(layerId.getName(), layerDep.getName())); } includeLayer(configStack, new ConfigId(configStack.id.getModel(), layerDep.getName())); } } configStack.includedLayer(layerId); for(ResolvedFeature feature : layerStack.orderFeatures(false)) { if(configStack.isFilteredOut(feature.getSpecId(), feature.getId())) { continue; } configStack.includeFeature(feature.id, feature.spec, feature.params, feature.deps); } }