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注解工具类支持Lambda获取某注解属性值

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This commit is contained in:
LinRuChang 2022-09-30 12:32:35 +08:00
parent 80f973093c
commit 2c24738b2c
2 changed files with 9 additions and 7 deletions
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13
hutool-core/src/main/java/cn/hutool/core/annotation/AnnotationUtil.java
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@ -9,11 +9,10 @@ import cn.hutool.core.exceptions.UtilException;
import cn.hutool.core.lang.Opt;
import cn.hutool.core.lang.func.Func1;
import cn.hutool.core.lang.func.LambdaUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.ReflectUtil;
import cn.hutool.core.util.*;
import java.lang.annotation.*;
import java.lang.invoke.SerializedLambda;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
@ -238,16 +237,18 @@ public class AnnotationUtil {
* @param <A> 注解类型
* @param <R> 注解类型值
* @param annotationEle {@link AnnotatedElement}，可以是Class、Method、Field、Constructor、ReflectPermission
* @param annotationType 注解类型
* @param propertyName 属性名，例如注解中定义了name()方法，则 此处传入name
* @return 注解对象
* @throws UtilException 调用注解中的方法时执行异常
*/
public static <A extends Annotation, R> R getAnnotationValue(AnnotatedElement annotationEle, Class<A> annotationType, Func1<A, R> propertyName) {
public static <A extends Annotation, R> R getAnnotationValue(AnnotatedElement annotationEle, Func1<A, R> propertyName) {
if(propertyName == null) {
return null;
}else {
return getAnnotationValue(annotationEle,annotationType, LambdaUtil.getMethodName(propertyName));
final SerializedLambda lambda = LambdaUtil.resolve(propertyName);
final String instantiatedMethodType = lambda.getInstantiatedMethodType();
Class<A> annotationClass = ClassUtil.loadClass(StrUtil.sub(instantiatedMethodType, 2, StrUtil.indexOf(instantiatedMethodType, ';')));
return getAnnotationValue(annotationEle,annotationClass, lambda.getImplMethodName());
}
}

3
hutool-core/src/test/java/cn/hutool/core/annotation/AnnotationUtilTest.java
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@ -1,5 +1,6 @@
package cn.hutool.core.annotation;
import cn.hutool.core.lang.Console;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ReflectUtil;
import org.junit.Assert;
@ -37,7 +38,7 @@ public class AnnotationUtilTest {
@Test
public void getAnnotationValueTest2() {
String[] names = AnnotationUtil.getAnnotationValue(ClassWithAnnotation.class, AnnotationForTest.class, AnnotationForTest::names);
String[] names = AnnotationUtil.getAnnotationValue(ClassWithAnnotation.class, AnnotationForTest::names);
Assert.assertTrue(ArrayUtil.equals(names, new String[]{"测试1", "测试2"}));
}