spring BeanMetadataAttributeAccessor 源码
spring BeanMetadataAttributeAccessor 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/BeanMetadataAttributeAccessor.java
/*
* Copyright 2002-2017 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;
import org.springframework.core.AttributeAccessorSupport;
import org.springframework.lang.Nullable;
/**
* Extension of {@link org.springframework.core.AttributeAccessorSupport},
* holding attributes as {@link BeanMetadataAttribute} objects in order
* to keep track of the definition source.
*
* @author Juergen Hoeller
* @since 2.5
*/
@SuppressWarnings("serial")
public class BeanMetadataAttributeAccessor extends AttributeAccessorSupport implements BeanMetadataElement {
@Nullable
private Object source;
/**
* Set the configuration source {@code Object} for this metadata element.
* <p>The exact type of the object will depend on the configuration mechanism used.
*/
public void setSource(@Nullable Object source) {
this.source = source;
}
@Override
@Nullable
public Object getSource() {
return this.source;
}
/**
* Add the given BeanMetadataAttribute to this accessor's set of attributes.
* @param attribute the BeanMetadataAttribute object to register
*/
public void addMetadataAttribute(BeanMetadataAttribute attribute) {
super.setAttribute(attribute.getName(), attribute);
}
/**
* Look up the given BeanMetadataAttribute in this accessor's set of attributes.
* @param name the name of the attribute
* @return the corresponding BeanMetadataAttribute object,
* or {@code null} if no such attribute defined
*/
@Nullable
public BeanMetadataAttribute getMetadataAttribute(String name) {
return (BeanMetadataAttribute) super.getAttribute(name);
}
@Override
public void setAttribute(String name, @Nullable Object value) {
super.setAttribute(name, new BeanMetadataAttribute(name, value));
}
@Override
@Nullable
public Object getAttribute(String name) {
BeanMetadataAttribute attribute = (BeanMetadataAttribute) super.getAttribute(name);
return (attribute != null ? attribute.getValue() : null);
}
@Override
@Nullable
public Object removeAttribute(String name) {
BeanMetadataAttribute attribute = (BeanMetadataAttribute) super.removeAttribute(name);
return (attribute != null ? attribute.getValue() : null);
}
}
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