public Engine()

in src/main/java/org/apache/commons/jexl3/internal/Engine.java [326:381]
52 lines of code
14 McCabe index (conditional complexity)

    public Engine(final JexlBuilder conf) {
        // options:
        this.options = conf.options().copy();
        this.strict = options.isStrict();
        this.safe = options.isSafe();
        this.silent = options.isSilent();
        this.cancellable = option(conf.cancellable(), !silent && strict);
        options.setCancellable(cancellable);
        this.debug = option(conf.debug(), true);
        this.collectMode = conf.collectMode();
        this.stackOverflow = conf.stackOverflow() > 0? conf.stackOverflow() : Integer.MAX_VALUE;
        // core properties:
        final JexlUberspect uber = conf.uberspect() == null
                ? getUberspect(conf.logger(), conf.strategy(), conf.permissions())
                : conf.uberspect();
        final ClassLoader loader = conf.loader();
        if (loader != null) {
            uber.setClassLoader(loader);
        }
        final JexlSandbox sandbox = conf.sandbox();
        if (sandbox == null) {
            this.uberspect = uber;
        } else {
            this.uberspect = new SandboxUberspect(uber, sandbox);
        }
        this.logger = conf.logger() == null ? LogFactory.getLog(JexlEngine.class) : conf.logger();
        this.arithmetic = conf.arithmetic() == null ? new JexlArithmetic(this.strict) : conf.arithmetic();
        options.setMathContext(arithmetic.getMathContext());
        options.setMathScale(arithmetic.getMathScale());
        options.setStrictArithmetic(arithmetic.isStrict());
        final Map<String, Object> ns = conf.namespaces();
        this.functions = ns == null || ns.isEmpty()? Collections.emptyMap() : ns; // should we make a copy?
        this.classNameSolver = new FqcnResolver(uberspect, conf.imports());
        // parsing & features:
        final JexlFeatures features = conf.features() == null ? DEFAULT_FEATURES : conf.features();
        Predicate<String> nsTest = features.namespaceTest();
        final Set<String> nsNames = functions.keySet();
        if (!nsNames.isEmpty()) {
            nsTest = nsTest == JexlFeatures.TEST_STR_FALSE ?nsNames::contains : nsTest.or(nsNames::contains);
        }
        this.expressionFeatures = new JexlFeatures(features).script(false).namespaceTest(nsTest);
        this.scriptFeatures = new JexlFeatures(features).script(true).namespaceTest(nsTest);
        this.charset = conf.charset();
        // caching:
        final IntFunction<JexlCache<?, ?>> factory = conf.cacheFactory();
        this.cacheFactory = factory == null ? SoftCache::new : factory;
        this.cache = (JexlCache<Source, ASTJexlScript>) (conf.cache() > 0 ? cacheFactory.apply(conf.cache()) : null);
        this.cacheThreshold = conf.cacheThreshold();
        if (uberspect == null) {
            throw new IllegalArgumentException("uberspect cannot be null");
        }
        this.parserFactory = conf.parserFactory() == null ?
               () -> new Parser(new StringProvider(";"))
                : conf.parserFactory();
        this.parser = parserFactory.get();
    }