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添加支持处理元注解的增强AnnotatedElement包装器
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huangchengxing
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package cn.hutool.core.annotation;
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import org.junit.Assert;
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import org.junit.Test;
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import java.lang.annotation.*;
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import java.lang.reflect.AnnotatedElement;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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import java.util.function.BiFunction;
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/**
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* test for {@link MetaAnnotatedElement}
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*
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* @author huangchengxing
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*/
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public class MetaAnnotatedElementTest {
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private static final BiFunction<ResolvedAnnotationMapping, Annotation, ResolvedAnnotationMapping> RESOLVED_MAPPING_FACTORY =
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(source, annotation) -> new ResolvedAnnotationMapping(source, annotation, true);
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private static final BiFunction<ResolvedAnnotationMapping, Annotation, ResolvedAnnotationMapping> MAPPING_FACTORY =
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(source, annotation) -> new ResolvedAnnotationMapping(source, annotation, false);
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@Test
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public void testEquals() {
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AnnotatedElement element = new MetaAnnotatedElement<>(Foo.class, RESOLVED_MAPPING_FACTORY);
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Assert.assertEquals(element, element);
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Assert.assertNotEquals(element, null);
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Assert.assertEquals(element, new MetaAnnotatedElement<>(Foo.class, RESOLVED_MAPPING_FACTORY));
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Assert.assertNotEquals(element, new MetaAnnotatedElement<>(Foo.class, MAPPING_FACTORY));
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Assert.assertNotEquals(element, new MetaAnnotatedElement<>(Annotation1.class, MAPPING_FACTORY));
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}
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@Test
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public void testHashCode() {
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int hashCode = new MetaAnnotatedElement<>(Foo.class, RESOLVED_MAPPING_FACTORY).hashCode();
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Assert.assertEquals(hashCode, new MetaAnnotatedElement<>(Foo.class, RESOLVED_MAPPING_FACTORY).hashCode());
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Assert.assertNotEquals(hashCode, new MetaAnnotatedElement<>(Foo.class, MAPPING_FACTORY).hashCode());
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}
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@Test
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public void testCreate() {
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// 第二次创建时优先从缓存中获取
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AnnotatedElement resolvedElement = MetaAnnotatedElement.create(Foo.class, RESOLVED_MAPPING_FACTORY);
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Assert.assertEquals(resolvedElement, MetaAnnotatedElement.create(Foo.class, RESOLVED_MAPPING_FACTORY));
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AnnotatedElement element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Assert.assertEquals(element, MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY));
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}
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@Test
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public void testGetMapping() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Assert.assertTrue(element.getMapping(Annotation1.class).isPresent());
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Assert.assertTrue(element.getMapping(Annotation2.class).isPresent());
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Assert.assertTrue(element.getMapping(Annotation3.class).isPresent());
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Assert.assertTrue(element.getMapping(Annotation4.class).isPresent());
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}
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@Test
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public void testGetDeclaredMapping() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Assert.assertFalse(element.getDeclaredMapping(Annotation1.class).isPresent());
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Assert.assertFalse(element.getDeclaredMapping(Annotation2.class).isPresent());
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Assert.assertTrue(element.getDeclaredMapping(Annotation3.class).isPresent());
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Assert.assertTrue(element.getDeclaredMapping(Annotation4.class).isPresent());
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}
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@Test
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public void testIsAnnotationPresent() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Assert.assertTrue(element.isAnnotationPresent(Annotation1.class));
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Assert.assertTrue(element.isAnnotationPresent(Annotation2.class));
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Assert.assertTrue(element.isAnnotationPresent(Annotation3.class));
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Assert.assertTrue(element.isAnnotationPresent(Annotation4.class));
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}
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@Test
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public void testGetAnnotation() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Annotation3 annotation3 = Foo.class.getAnnotation(Annotation3.class);
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Annotation2 annotation2 = Annotation3.class.getAnnotation(Annotation2.class);
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Annotation1 annotation1 = Annotation2.class.getAnnotation(Annotation1.class);
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Assert.assertEquals(annotation1, element.getAnnotation(Annotation1.class));
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Assert.assertEquals(annotation2, element.getAnnotation(Annotation2.class));
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Assert.assertEquals(annotation3, element.getAnnotation(Annotation3.class));
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Assert.assertEquals(annotation4, element.getAnnotation(Annotation4.class));
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}
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@Test
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public void testGetDeclaredAnnotation() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Annotation3 annotation3 = Foo.class.getAnnotation(Annotation3.class);
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Assert.assertNull(element.getDeclaredAnnotation(Annotation1.class));
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Assert.assertNull(element.getDeclaredAnnotation(Annotation2.class));
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Assert.assertEquals(annotation3, element.getDeclaredAnnotation(Annotation3.class));
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Assert.assertEquals(annotation4, element.getDeclaredAnnotation(Annotation4.class));
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}
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@Test
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public void testGetAnnotationByType() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Assert.assertArrayEquals(
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new Annotation[]{ annotation4 },
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element.getAnnotationsByType(Annotation4.class)
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);
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}
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@Test
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public void testGetDeclaredAnnotationByType() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Assert.assertArrayEquals(
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new Annotation[]{ annotation4 },
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element.getDeclaredAnnotationsByType(Annotation4.class)
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);
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}
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@Test
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public void testGetAnnotations() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Annotation3 annotation3 = Foo.class.getAnnotation(Annotation3.class);
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Annotation2 annotation2 = Annotation3.class.getAnnotation(Annotation2.class);
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Annotation1 annotation1 = Annotation2.class.getAnnotation(Annotation1.class);
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Annotation[] annotations = new Annotation[]{ annotation3, annotation4, annotation2, annotation1 };
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Assert.assertArrayEquals(annotations, element.getAnnotations());
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}
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@Test
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public void testGetDeclaredAnnotations() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Annotation3 annotation3 = Foo.class.getAnnotation(Annotation3.class);
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Annotation[] annotations = new Annotation[]{ annotation3, annotation4 };
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Assert.assertArrayEquals(annotations, element.getDeclaredAnnotations());
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}
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@Test
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public void testIterator() {
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(Foo.class, MAPPING_FACTORY);
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Annotation4 annotation4 = Foo.class.getAnnotation(Annotation4.class);
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Annotation3 annotation3 = Foo.class.getAnnotation(Annotation3.class);
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Annotation2 annotation2 = Annotation3.class.getAnnotation(Annotation2.class);
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Annotation1 annotation1 = Annotation2.class.getAnnotation(Annotation1.class);
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Annotation[] annotations = new Annotation[]{ annotation3, annotation4, annotation2, annotation1 };
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Iterator<ResolvedAnnotationMapping> iterator = element.iterator();
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List<Annotation> mappingList = new ArrayList<>();
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iterator.forEachRemaining(mapping -> mappingList.add(mapping.getAnnotation()));
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Assert.assertEquals(Arrays.asList(annotations), mappingList);
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}
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@Test
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public void testGetElement() {
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AnnotatedElement source = Foo.class;
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MetaAnnotatedElement<ResolvedAnnotationMapping> element = MetaAnnotatedElement.create(source, MAPPING_FACTORY);
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Assert.assertSame(source, element.getElement());
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}
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@Target(ElementType.TYPE_USE)
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@Retention(RetentionPolicy.RUNTIME)
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private @interface Annotation1 {
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@Alias("name")
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String value() default "";
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@Alias("value")
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String name() default "";
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}
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@Annotation1("Annotation2")
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@Target(ElementType.TYPE_USE)
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@Retention(RetentionPolicy.RUNTIME)
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private @interface Annotation2 {
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@Alias("name")
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String value() default "";
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@Alias("value")
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String name() default "";
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}
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@Annotation2("Annotation3")
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@Target(ElementType.TYPE_USE)
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@Retention(RetentionPolicy.RUNTIME)
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private @interface Annotation3 {
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String name() default "";
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}
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@Annotation2("Annotation4")
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@Target(ElementType.TYPE_USE)
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@Retention(RetentionPolicy.RUNTIME)
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private @interface Annotation4 {
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String value() default "";
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}
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@Annotation3(name = "foo")
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@Annotation4("foo")
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private static class Foo {};
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}
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