/
DataPermissionAnnotationInterceptor.java
72 lines (63 loc) · 2.81 KB
/
DataPermissionAnnotationInterceptor.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
package cn.iocoder.yudao.framework.datapermission.core.aop;
import cn.iocoder.yudao.framework.datapermission.core.annotation.DataPermission;
import lombok.Getter;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.core.MethodClassKey;
import org.springframework.core.annotation.AnnotationUtils;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* {@link DataPermission} 注解的拦截器
* 1. 在执行方法前,将 @DataPermission 注解入栈
* 2. 在执行方法后,将 @DataPermission 注解出栈
*
* @author 芋道源码
*/
@DataPermission // 该注解,用于 {@link DATA_PERMISSION_NULL} 的空对象
public class DataPermissionAnnotationInterceptor implements MethodInterceptor {
/**
* DataPermission 空对象,用于方法无 {@link DataPermission} 注解时,使用 DATA_PERMISSION_NULL 进行占位
*/
static final DataPermission DATA_PERMISSION_NULL = DataPermissionAnnotationInterceptor.class.getAnnotation(DataPermission.class);
@Getter
private final Map<MethodClassKey, DataPermission> dataPermissionCache = new ConcurrentHashMap<>();
@Override
public Object invoke(MethodInvocation methodInvocation) throws Throwable {
// 入栈
DataPermission dataPermission = this.findAnnotation(methodInvocation);
if (dataPermission != null) {
DataPermissionContextHolder.add(dataPermission);
}
try {
// 执行逻辑
return methodInvocation.proceed();
} finally {
// 出栈
if (dataPermission != null) {
DataPermissionContextHolder.remove();
}
}
}
private DataPermission findAnnotation(MethodInvocation methodInvocation) {
// 1. 从缓存中获取
Method method = methodInvocation.getMethod();
Object targetObject = methodInvocation.getThis();
Class<?> clazz = targetObject != null ? targetObject.getClass() : method.getDeclaringClass();
MethodClassKey methodClassKey = new MethodClassKey(method, clazz);
DataPermission dataPermission = dataPermissionCache.get(methodClassKey);
if (dataPermission != null) {
return dataPermission != DATA_PERMISSION_NULL ? dataPermission : null;
}
// 2.1 从方法中获取
dataPermission = AnnotationUtils.findAnnotation(method, DataPermission.class);
// 2.2 从类上获取
if (dataPermission == null) {
dataPermission = AnnotationUtils.findAnnotation(clazz, DataPermission.class);
}
// 2.3 添加到缓存中
dataPermissionCache.put(methodClassKey, dataPermission != null ? dataPermission : DATA_PERMISSION_NULL);
return dataPermission;
}
}