spring BeanFactoryResolver 源码
spring BeanFactoryResolver 代码
文件路径：/spring-context/src/main/java/org/springframework/context/expression/BeanFactoryResolver.java
/*
* Copyright 2002-2018 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.expression;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.expression.AccessException;
import org.springframework.expression.BeanResolver;
import org.springframework.expression.EvaluationContext;
import org.springframework.util.Assert;
/**
* EL bean resolver that operates against a Spring
* {@link org.springframework.beans.factory.BeanFactory}.
*
* @author Juergen Hoeller
* @since 3.0.4
*/
public class BeanFactoryResolver implements BeanResolver {
private final BeanFactory beanFactory;
/**
* Create a new {@link BeanFactoryResolver} for the given factory.
* @param beanFactory the {@link BeanFactory} to resolve bean names against
*/
public BeanFactoryResolver(BeanFactory beanFactory) {
Assert.notNull(beanFactory, "BeanFactory must not be null");
this.beanFactory = beanFactory;
}
@Override
public Object resolve(EvaluationContext context, String beanName) throws AccessException {
try {
return this.beanFactory.getBean(beanName);
}
catch (BeansException ex) {
throw new AccessException("Could not resolve bean reference against BeanFactory", ex);
}
}
}
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