public void loadJSONResources()

in core/src/main/java/org/apache/stormcrawler/filtering/regex/FastURLFilter.java [108:165]
44 lines of code
10 McCabe index (conditional complexity)

    public void loadJSONResources(InputStream inputStream)
            throws JsonParseException, JsonMappingException, IOException {

        JsonNode rootNode = objectMapper.readTree(inputStream);

        // if it contains a single object
        // jump directly to its content
        // https://github.com/apache/incubator-stormcrawler/issues/1013
        if (rootNode.size() == 1 && rootNode.isObject()) {
            rootNode = rootNode.fields().next().getValue();
        }

        final Rules rules = new Rules();

        Iterator<JsonNode> iter = rootNode.elements();
        while (iter.hasNext()) {
            final JsonNode current = iter.next();
            final Scope scope = new Scope();
            final String scopeval = current.get("scope").asText().trim();
            int offset = 0;
            Scope.Type type;
            String value = null;
            // separate the type from the pattern
            if (scopeval.equals("GLOBAL")) {
                type = Scope.Type.GLOBAL;
            } else if (scopeval.startsWith("domain:")) {
                type = Scope.Type.DOMAIN;
                offset = "domain:".length();
                value = scopeval.substring(offset);
            } else if (scopeval.startsWith("host:")) {
                type = Scope.Type.HOSTNAME;
                offset = "host:".length();
                value = scopeval.substring(offset);
            } else if (scopeval.startsWith("metadata:")) {
                type = Scope.Type.METADATA;
                offset = "metadata:".length();
                value = scopeval.substring(offset);
            } else throw new RuntimeException("Invalid scope: " + scopeval);

            final JsonNode patternsNode = current.get("patterns");
            if (patternsNode == null)
                throw new RuntimeException("Missing patterns for scope" + scopeval);

            final List<Rule> rlist = new LinkedList<>();

            Iterator<JsonNode> iterPatterns = patternsNode.elements();
            while (iterPatterns.hasNext()) {
                JsonNode patternNode = iterPatterns.next();
                rlist.add(new Rule(patternNode.asText()));
            }

            scope.setRules(rlist);

            rules.addScope(scope, type, value);
        }

        this.rules = rules;
    }