code: private Map<? extends String, ? extends Parameter> buildConstParamMap() {
  		Map<String, Parameter> paramMap = new HashMap<>();
  		for (String className : constantClassNames) {
  			if (StringUtils.isNotBlank(className)) {
  				try {
  					Class<?> targetClass = Class.forName(className, true, Thread.currentThread()
  							.getContextClassLoader());
  					makeConstParamMap(paramMap, targetClass);
  				} catch (ClassNotFoundException ex) {
  					LOG.error(ex.getMessage(), ex);
  				}
  			}
  		}
  		return paramMap;
  	}
docs: 定数クラスパラメータMap生成
  
  @return 定数クラスパラメータMap