spring AutowiredPropertyMarker 源码
spring AutowiredPropertyMarker 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/factory/config/AutowiredPropertyMarker.java
/*
* Copyright 2002-2019 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.beans.factory.config;
import java.io.Serializable;
import org.springframework.lang.Nullable;
/**
* Simple marker class for an individually autowired property value, to be added
* to {@link BeanDefinition#getPropertyValues()} for a specific bean property.
*
* <p>At runtime, this will be replaced with a {@link DependencyDescriptor}
* for the corresponding bean property's write method, eventually to be resolved
* through a {@link AutowireCapableBeanFactory#resolveDependency} step.
*
* @author Juergen Hoeller
* @since 5.2
* @see AutowireCapableBeanFactory#resolveDependency
* @see BeanDefinition#getPropertyValues()
* @see org.springframework.beans.factory.support.BeanDefinitionBuilder#addAutowiredProperty
*/
@SuppressWarnings("serial")
public final class AutowiredPropertyMarker implements Serializable {
/**
* The canonical instance for the autowired marker value.
*/
public static final Object INSTANCE = new AutowiredPropertyMarker();
private AutowiredPropertyMarker() {
}
private Object readResolve() {
return INSTANCE;
}
@Override
public boolean equals(@Nullable Object obj) {
return (this == obj);
}
@Override
public int hashCode() {
return AutowiredPropertyMarker.class.hashCode();
}
@Override
public String toString() {
return "(autowired)";
}
}
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