001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spring.util;
018
019import org.apache.camel.NoSuchBeanException;
020import org.apache.camel.spi.Registry;
021import org.springframework.expression.AccessException;
022import org.springframework.expression.BeanResolver;
023import org.springframework.expression.EvaluationContext;
024
025/**
026 * EL bean resolver that operates against a Camel {@link Registry}.
027 */
028public final class RegistryBeanResolver implements BeanResolver {
029
030    private final Registry registry;
031
032    public RegistryBeanResolver(Registry registry) {
033        this.registry = registry;
034    }
035
036    @Override
037    public Object resolve(EvaluationContext context, String beanName) throws AccessException {
038        Object bean = null;
039        try {
040            bean = registry.lookupByName(beanName);
041        } catch (NoSuchBeanException e) {
042            // ignore
043        }
044        if (bean == null) {
045            throw new AccessException("Could not resolve bean reference against Registry");
046        }
047        return bean;
048    }
049
050}