public static Model applyVariables()

in src/main/java/org/apache/sling/provisioning/model/ModelUtility.java [271:311]
33 lines of code
5 McCabe index (conditional complexity)

    public static Model applyVariables(final Model model, final VariableResolver resolver) {

        // define delegating resolver that collects all variable names and value per feature
        final Map<String,Map<String,String>> collectedVars = new HashMap<>();
        VariableResolver variableCollector = new VariableResolver() {
            @Override
            public String resolve(Feature feature, String name) {
                String value = resolver.resolve(feature, name);
                if (value != null) {
                    Map<String,String> featureVars = collectedVars.get(feature.getName());
                    if (featureVars == null) {
                        featureVars = new HashMap<>();
                        collectedVars.put(feature.getName(), featureVars);
                    }
                    featureVars.put(name, value);
                }
                return value;
            }
        };

        // use effective model processor to collect variables, but drop the resulting model
        new EffectiveModelProcessor(new ResolverOptions().variableResolver(variableCollector)).process(model);

        // define a processor that updates the "variables" sections in the features
        ModelProcessor variablesUpdater = new ModelProcessor() {
            @Override
            protected KeyValueMap<String> processVariables(KeyValueMap<String> variables, Feature newFeature) {
                KeyValueMap<String> newVariables = new KeyValueMap<>();
                Map<String,String> featureVars = collectedVars.get(newFeature.getName());
                if (featureVars != null) {
                    for (Map.Entry<String, String> entry : featureVars.entrySet()) {
                        newVariables.put(entry.getKey(), entry.getValue());
                    }
                }
                return newVariables;
            }
        };

        // return model with replaced "variables" sections
        return variablesUpdater.process(model);
    }