@Override
	public boolean checkRequireExpression(Requireable candidate, AppContextModel contextModel) {
		try {
			String requireExpression = candidate.getRequire();
			if (StringUtils.isBlank(requireExpression)) {
				return true;
			}
			ObjectMapper j = new ObjectMapper();
			for (Map.Entry<String, Object> e : contextModel.entrySet()) {
				if (!(e.getValue() instanceof Map) && !"util".equals(e.getKey())) {
					javascriptEngine.eval("var " + e.getKey() + " = " + j.writeValueAsString(e.getValue()) + ";");
				}
			}
			return javascriptEngine.eval("(" + requireExpression + ") == true").equals(Boolean.TRUE);
		}
		catch (Exception e) {
			log.error("Failed to evaluate 'require' check for extension " + candidate.getId(), e);
			return false;
		}
	}