RequestCondition (Spring Framework 5.2.12.RELEASE API)

类型参数:
T - the type of objects that this RequestCondition can be combined with and compared to
所有已知实现类:
AbstractRequestCondition, CompositeRequestCondition, ConsumesRequestCondition, HeadersRequestCondition, ParamsRequestCondition, PatternsRequestCondition, ProducesRequestCondition, RequestConditionHolder, RequestMappingInfo, RequestMethodsRequestCondition
```
public interface RequestCondition<T>
```
Contract for request mapping conditions.
Request conditions can be combined via combine(Object), matched to a request via getMatchingCondition(HttpServletRequest), and compared to each other via compareTo(Object, HttpServletRequest) to determine which is a closer match for a given request.
从以下版本开始:
3.1
作者:
Rossen Stoyanchev, Arjen Poutsma

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`T`	`combine(T other)`	Combine this condition with another such as conditions from a type-level and method-level `@RequestMapping` annotation.
`int`	`compareTo(T other, HttpServletRequest request)`	Compare this condition to another condition in the context of a specific request.
`T`	`getMatchingCondition(HttpServletRequest request)`	Check if the condition matches the request returning a potentially new instance created for the current request.

- 方法详细资料
  - combine
```
T combine(T other)
```
    Combine this condition with another such as conditions from a type-level and method-level @RequestMapping annotation.
    参数:
    other - the condition to combine with.
    返回:
    a request condition instance that is the result of combining the two condition instances.
  - getMatchingCondition
```
@Nullable
T getMatchingCondition(HttpServletRequest request)
```
    Check if the condition matches the request returning a potentially new instance created for the current request. For example a condition with multiple URL patterns may return a new instance only with those patterns that match the request.
    For CORS pre-flight requests, conditions should match to the would-be, actual request (e.g. URL pattern, query parameters, and the HTTP method from the "Access-Control-Request-Method" header). If a condition cannot be matched to a pre-flight request it should return an instance with empty content thus not causing a failure to match.
    返回:
    a condition instance in case of a match or null otherwise.
  - compareTo
```
int compareTo(T other,
              HttpServletRequest request)
```
    Compare this condition to another condition in the context of a specific request. This method assumes both instances have been obtained via getMatchingCondition(HttpServletRequest) to ensure they have content relevant to current request only.