You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.9 KiB
62 lines
1.9 KiB
# Spring OrderUtils
|
|
- Author: [HuiFer](https://github.com/huifer)
|
|
- 源码阅读仓库: [SourceHot-Spring](https://github.com/SourceHot/spring-framework-read)
|
|
- `org.springframework.core.annotation.OrderUtils`主要方法如下
|
|
1. getOrder
|
|
1. getPriority
|
|
|
|
- 测试类`org.springframework.core.annotation.OrderUtilsTests`
|
|
|
|
```java
|
|
@Nullable
|
|
public static Integer getOrder(Class<?> type) {
|
|
// 缓存中获取
|
|
Object cached = orderCache.get(type);
|
|
if (cached != null) {
|
|
// 返回 int
|
|
return (cached instanceof Integer ? (Integer) cached : null);
|
|
}
|
|
/**
|
|
* 注解工具类,寻找{@link Order}注解
|
|
*/
|
|
Order order = AnnotationUtils.findAnnotation(type, Order.class);
|
|
Integer result;
|
|
if (order != null) {
|
|
// 返回
|
|
result = order.value();
|
|
} else {
|
|
result = getPriority(type);
|
|
}
|
|
// key: 类名,value: intValue
|
|
orderCache.put(type, (result != null ? result : NOT_ANNOTATED));
|
|
return result;
|
|
}
|
|
|
|
```
|
|
|
|
|
|
```java
|
|
@Nullable
|
|
public static Integer getPriority(Class<?> type) {
|
|
if (priorityAnnotationType == null) {
|
|
return null;
|
|
}
|
|
// 缓存中获取
|
|
Object cached = priorityCache.get(type);
|
|
if (cached != null) {
|
|
// 不为空返回
|
|
return (cached instanceof Integer ? (Integer) cached : null);
|
|
}
|
|
// 注解工具获取注解
|
|
Annotation priority = AnnotationUtils.findAnnotation(type, priorityAnnotationType);
|
|
Integer result = null;
|
|
if (priority != null) {
|
|
// 获取 value
|
|
result = (Integer) AnnotationUtils.getValue(priority);
|
|
}
|
|
// 向缓存插入数据
|
|
priorityCache.put(type, (result != null ? result : NOT_ANNOTATED));
|
|
return result;
|
|
}
|
|
|
|
``` |