spring AliasDefinition 源码
spring AliasDefinition 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/factory/parsing/AliasDefinition.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.factory.parsing;
import org.springframework.beans.BeanMetadataElement;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Representation of an alias that has been registered during the parsing process.
*
* @author Juergen Hoeller
* @since 2.0
* @see ReaderEventListener#aliasRegistered(AliasDefinition)
*/
public class AliasDefinition implements BeanMetadataElement {
private final String beanName;
private final String alias;
@Nullable
private final Object source;
/**
* Create a new AliasDefinition.
* @param beanName the canonical name of the bean
* @param alias the alias registered for the bean
*/
public AliasDefinition(String beanName, String alias) {
this(beanName, alias, null);
}
/**
* Create a new AliasDefinition.
* @param beanName the canonical name of the bean
* @param alias the alias registered for the bean
* @param source the source object (may be {@code null})
*/
public AliasDefinition(String beanName, String alias, @Nullable Object source) {
Assert.notNull(beanName, "Bean name must not be null");
Assert.notNull(alias, "Alias must not be null");
this.beanName = beanName;
this.alias = alias;
this.source = source;
}
/**
* Return the canonical name of the bean.
*/
public final String getBeanName() {
return this.beanName;
}
/**
* Return the alias registered for the bean.
*/
public final String getAlias() {
return this.alias;
}
@Override
@Nullable
public final Object getSource() {
return this.source;
}
}
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