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PrimitiveBeanLookupAndAutowiringTests.java
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PrimitiveBeanLookupAndAutowiringTests.java
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/*
* Copyright 2002-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.context.annotation;
import jakarta.annotation.Resource;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests changes introduced for SPR-8874, allowing beans of primitive types to be looked
* up via getBean(Class), or to be injected using @Autowired or @Injected or @Resource.
* Prior to these changes, an attempt to lookup or inject a bean of type boolean would
* fail because all spring beans are Objects, regardless of initial type due to the way
* that ObjectFactory works.
*
* Now these attempts to lookup or inject primitive types work, thanks to simple changes
* in AbstractBeanFactory using ClassUtils#isAssignable methods instead of the built-in
* Class#isAssignableFrom. The former takes into account primitives and their object
* wrapper types, whereas the latter does not.
*
* @author Chris Beams
* @since 3.1
*/
public class PrimitiveBeanLookupAndAutowiringTests {
@Test
public void primitiveLookupByName() {
ApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class);
boolean b = ctx.getBean("b", boolean.class);
assertThat(b).isTrue();
int i = ctx.getBean("i", int.class);
assertThat(i).isEqualTo(42);
}
@Test
public void primitiveLookupByType() {
ApplicationContext ctx = new AnnotationConfigApplicationContext(Config.class);
boolean b = ctx.getBean(boolean.class);
assertThat(b).isTrue();
int i = ctx.getBean(int.class);
assertThat(i).isEqualTo(42);
}
@Test
public void primitiveAutowiredInjection() {
ApplicationContext ctx =
new AnnotationConfigApplicationContext(Config.class, AutowiredComponent.class);
assertThat(ctx.getBean(AutowiredComponent.class).b).isTrue();
assertThat(ctx.getBean(AutowiredComponent.class).i).isEqualTo(42);
}
@Test
public void primitiveResourceInjection() {
ApplicationContext ctx =
new AnnotationConfigApplicationContext(Config.class, ResourceComponent.class);
assertThat(ctx.getBean(ResourceComponent.class).b).isTrue();
assertThat(ctx.getBean(ResourceComponent.class).i).isEqualTo(42);
}
@Configuration
static class Config {
@Bean
public boolean b() {
return true;
}
@Bean
public int i() {
return 42;
}
}
static class AutowiredComponent {
@Autowired boolean b;
@Autowired int i;
}
static class ResourceComponent {
@Resource boolean b;
@Autowired int i;
}
}