org.springframework.context.expression.BeanFactoryResolver.java Source code

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Here is the source code for org.springframework.context.expression.BeanFactoryResolver.java

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/*
 * 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);
        }
    }

}