MessageCondition (Spring Framework 4.3.30.RELEASE API)

类型参数:
T - the kind of condition that this condition can be combined with or compared to
所有已知实现类:
AbstractMessageCondition, DestinationPatternsMessageCondition, SimpMessageMappingInfo, SimpMessageTypeMessageCondition
```
public interface MessageCondition<T>
```
Contract for mapping conditions to messages.
Message conditions can be combined (e.g. type + method-level conditions), matched to a specific Message, as well as compared to each other in the context of a Message to determine which one matches a request more closely.
从以下版本开始:
4.0
作者:
Rossen Stoyanchev

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)`	Define the rules for combining this condition with another.
`int`	`compareTo(T other, Message<?> message)`	Compare this condition to another in the context of a specific message.
`T`	`getMatchingCondition(Message<?> message)`	Check if this condition matches the given Message and returns a potentially new condition with content tailored to the current message.

- 方法详细资料
  - combine
```
T combine(T other)
```
    Define the rules for combining this condition with another. For example combining type- and method-level conditions.
    参数:
    other - the condition to combine with
    返回:
    the resulting message condition
  - getMatchingCondition
```
T getMatchingCondition(Message<?> message)
```
    Check if this condition matches the given Message and returns a potentially new condition with content tailored to the current message. For example a condition with destination patterns might return a new condition with sorted, matching patterns only.
    返回:
    a condition instance in case of a match; or null if there is no match.
  - compareTo
```
int compareTo(T other,
              Message<?> message)
```
    Compare this condition to another in the context of a specific message. It is assumed both instances have been obtained via getMatchingCondition(Message) to ensure they have content relevant to current message only.