private Object tryEval()

in src/main/java/org/apache/commons/jexl3/internal/Operator.java [512:551]
34 lines of code
11 McCabe index (conditional complexity)

    private Object tryEval(final JexlCache.Reference node, final JexlOperator operator, final Object...args) {
        if (node != null) {
            final Object cached = node.getCache();
            if (cached instanceof JexlMethod) {
                // we found a method on previous call; try and reuse it (*1)
                final JexlMethod me = (JexlMethod) cached;
                final Object eval = me.tryInvoke(operator.getMethodName(), arithmetic, args);
                if (!me.tryFailed(eval)) {
                    return eval;
                }
            } else if (cached instanceof MethodKey) {
                // check for a fail-fast, we tried to find an overload before but could not (*2)
                final MethodKey cachedKey = (MethodKey) cached;
                final MethodKey key = new MethodKey(operator.getMethodName(), args);
                if (key.equals(cachedKey)) {
                    return JexlEngine.TRY_FAILED;
                }
            }
        }
        // trying to find an operator overload
        JexlMethod vm = getOperator(operator, args);
        // no direct overload, any special case ?
        if (vm == null) {
            vm = getAlternateOverload(operator, args);
        }
        // *1: found a method, try it and cache it if successful
        if (vm != null) {
            final Object result = vm.tryInvoke(operator.getMethodName(), arithmetic, args);
            if (node != null && !vm.tryFailed(result)) {
                node.setCache(vm);
            }
            return result;
        }
        if (node != null) {
            // *2: could not find an overload for this operator and arguments, keep track of the fail
            MethodKey key = new MethodKey(operator.getMethodName(), args);
            node.setCache(key);
        }
        return JexlEngine.TRY_FAILED;
    }