AbstractNamedValueMethodArgumentResolver.java 文件源码

/**
 * Create a new NamedValueInfo based on the given NamedValueInfo with sanitized values.
 */
private NamedValueInfo updateNamedValueInfo(MethodParameter parameter, NamedValueInfo info) {
    String name = info.name;
    if (info.name.length() == 0) {
        name = parameter.getParameterName();
        Assert.notNull(name, "Name for argument type [" + parameter.getParameterType().getName()
                    + "] not available, and parameter name information not found in class file either.");
    }
    String defaultValue = (ValueConstants.DEFAULT_NONE.equals(info.defaultValue) ? null : info.defaultValue);
    return new NamedValueInfo(name, info.required, defaultValue);
}