org.springframework.expression.BeanResolver Maven / Gradle / Ivy
/*
* Copyright 2002-2021 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.expression;
/**
* A bean resolver can be registered with the evaluation context and will kick in
* for bean references: {@code @myBeanName} and {@code &myBeanName} expressions.
* The {@code &} variant syntax allows access to the factory bean where relevant.
*
* @author Andy Clement
* @since 3.0.3
*/
public interface BeanResolver {
/**
* Look up a bean by the given name and return a corresponding instance for it.
* For attempting access to a factory bean, the name needs a {@code &} prefix.
* @param context the current evaluation context
* @param beanName the name of the bean to look up
* @return an object representing the bean
* @throws AccessException if there is an unexpected problem resolving the bean
*/
Object resolve(EvaluationContext context, String beanName) throws AccessException;
}