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add methodsa

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This commit is contained in:
Looly 2022-09-30 19:45:39 +08:00
parent bfdc1ecbda
commit 83a4f14b43
2 changed files with 53 additions and 8 deletions
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37
hutool-core/src/main/java/cn/hutool/core/annotation/AnnotationUtil.java
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@ -1,14 +1,25 @@
package cn.hutool.core.annotation;
import cn.hutool.core.classloader.ClassLoaderUtil;
import cn.hutool.core.exceptions.UtilException;
import cn.hutool.core.lang.func.LambdaInfo;
import cn.hutool.core.lang.func.LambdaUtil;
import cn.hutool.core.lang.func.SerFunction;
import cn.hutool.core.map.MapUtil;
import cn.hutool.core.map.WeakConcurrentMap;
import cn.hutool.core.reflect.FieldUtil;
import cn.hutool.core.reflect.MethodUtil;
import cn.hutool.core.text.StrUtil;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjUtil;
import java.lang.annotation.*;
import java.lang.annotation.Annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
@ -39,7 +50,7 @@ public class AnnotationUtil {
* @return 注解
* @since 6.0.0
*/
public static Annotation[] getDeclaredAnnotations(AnnotatedElement element) {
public static Annotation[] getDeclaredAnnotations(final AnnotatedElement element) {
return MapUtil.computeIfAbsent(DECLARED_ANNOTATIONS_CACHE, element, AnnotatedElement::getDeclaredAnnotations);
}
@ -168,6 +179,28 @@ public class AnnotationUtil {
return getAnnotationValue(annotationEle, annotationType, "value");
}
/**
* 获取指定注解属性的值<br>
* 如果无指定的属性方法返回null
*
* @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 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(final AnnotatedElement annotationEle, final SerFunction<A, R> propertyName) {
if(propertyName == null) {
return null;
}else {
final LambdaInfo lambda = LambdaUtil.resolve(propertyName);
final String instantiatedMethodType = lambda.getLambda().getInstantiatedMethodType();
final Class<A> annotationClass = ClassLoaderUtil.loadClass(StrUtil.sub(instantiatedMethodType, 2, StrUtil.indexOf(instantiatedMethodType, ';')));
return getAnnotationValue(annotationEle,annotationClass, lambda.getLambda().getImplMethodName());
}
}
/**
* 获取指定注解属性的值<br>
* 如果无指定的属性方法返回null

24
hutool-core/src/test/java/cn/hutool/core/annotation/AnnotationUtilTest.java
View File

@ -1,11 +1,16 @@
package cn.hutool.core.annotation;
import cn.hutool.core.util.ArrayUtil;
import cn.hutool.core.util.ObjUtil;
import lombok.SneakyThrows;
import org.junit.Assert;
import org.junit.Test;
import java.lang.annotation.*;
import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;
import java.util.Map;
@ -16,7 +21,7 @@ public class AnnotationUtilTest {
@Test
public void testGetDeclaredAnnotations() {
Annotation[] annotations = AnnotationUtil.getDeclaredAnnotations(ClassForTest.class);
final Annotation[] annotations = AnnotationUtil.getDeclaredAnnotations(ClassForTest.class);
Assert.assertArrayEquals(annotations, ClassForTest.class.getDeclaredAnnotations());
Assert.assertSame(annotations, AnnotationUtil.getDeclaredAnnotations(ClassForTest.class));
@ -85,7 +90,7 @@ public class AnnotationUtilTest {
final AnnotationForTest annotation = ClassForTest.class.getAnnotation(AnnotationForTest.class);
final Map<String, Object> valueMap = AnnotationUtil.getAnnotationValueMap(ClassForTest.class, AnnotationForTest.class);
Assert.assertNotNull(valueMap);
Assert.assertEquals(1, valueMap.size());
Assert.assertEquals(2, valueMap.size());
Assert.assertEquals(annotation.value(), valueMap.get("value"));
}
@ -129,9 +134,9 @@ public class AnnotationUtilTest {
@Test
public void testGetAnnotationAttributes() {
Method[] methods = AnnotationUtil.getAnnotationAttributes(AnnotationForTest.class);
final Method[] methods = AnnotationUtil.getAnnotationAttributes(AnnotationForTest.class);
Assert.assertArrayEquals(methods, AnnotationUtil.getAnnotationAttributes(AnnotationForTest.class));
Assert.assertEquals(1, methods.length);
Assert.assertEquals(2, methods.length);
Assert.assertArrayEquals(AnnotationForTest.class.getDeclaredMethods(), methods);
}
@ -142,6 +147,12 @@ public class AnnotationUtilTest {
Assert.assertTrue(AnnotationUtil.isAnnotationAttribute(AnnotationForTest.class.getMethod("value")));
}
@Test
public void getAnnotationValueTest2() {
final String[] names = AnnotationUtil.getAnnotationValue(ClassForTest.class, AnnotationForTest::names);
Assert.assertTrue(ArrayUtil.equals(names, new String[]{"测试1", "测试2"}));
}
@Target(ElementType.TYPE_USE)
@Retention(RetentionPolicy.RUNTIME)
private @interface MetaAnnotationForTest{
@ -155,9 +166,10 @@ public class AnnotationUtilTest {
@Retention(RetentionPolicy.RUNTIME)
private @interface AnnotationForTest{
String value() default "";
String[] names() default "";
}
@AnnotationForTest("foo")
@AnnotationForTest(value = "foo", names = {"测试1", "测试2"})
private static class ClassForTest{}
}