001
002package ca.uhn.fhir.jpa.util;
003
004/*-
005 * #%L
006 * HAPI FHIR JPA Server
007 * %%
008 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
009 * %%
010 * Licensed under the Apache License, Version 2.0 (the "License");
011 * you may not use this file except in compliance with the License.
012 * You may obtain a copy of the License at
013 *
014 *      http://www.apache.org/licenses/LICENSE-2.0
015 *
016 * Unless required by applicable law or agreed to in writing, software
017 * distributed under the License is distributed on an "AS IS" BASIS,
018 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
019 * See the License for the specific language governing permissions and
020 * limitations under the License.
021 * #L%
022 */
023
024import org.springframework.aop.framework.Advised;
025import org.springframework.aop.support.AopUtils;
026
027/**
028 * Utility to get the Spring proxy object's target object
029 */
030public class SpringObjectCaster {
031
032    /**
033     * Retrieve the Spring proxy object's target object
034     * @param proxy
035     * @param clazz
036     * @param <T>
037     * @return
038     * @throws Exception
039     */
040    public static <T> T getTargetObject(Object proxy, Class<T> clazz) throws Exception {
041        while( (AopUtils.isJdkDynamicProxy(proxy))) {
042            return clazz.cast(getTargetObject(((Advised)proxy).getTargetSource().getTarget(), clazz));
043        }
044
045        return clazz.cast(proxy);
046    }
047}